J OURNAL OF C RUSTACEAN B IOLOGY, 34(6), 848-861, 2014 MOLECULAR AND MORPHOLOGICAL RESURRECTION OF CLIBANARIUS SYMMETRICUS (RANDALL, 1840), A CRYPTIC SPECIES HIDING UNDER THE NAME FOR THE “THINSTRIPE” HERMIT CRAB C. VITTATUS (BOSC, 1802) (DECAPODA: ANOMURA: DIOGENIDAE) Mariana Negri 1 , Rafael Lemaitre 2 , and Fernando L. Mantelatto 1,∗ 1 Laboratory of Bioecology and Crustacean Systematics, Post-graduate Program in Comparative Biology, Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto (FFCLRP), University of São Paulo (USP), Av. Bandeirantes 3900, CEP 14040-901, Ribeirão Preto (SP), Brazil 2 Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, 4210 Silver Hill Road, Suitland, MD 20746, USA ABSTRACT Analysis of the barcode region of the COI gene has unmasked a cryptic hermit crab species confounded under the name Clibanarius vittatus (Bosc, 1802), long applied to a common littoral, striped-colored species presumed to range broadly in the western Atlantic from the southeastern United States and Gulf of Mexico to Brazil. Molecular and morphological (color) data from recently collected specimens distinctly show that Bosc’ name should be restricted to populations in the southeastern coast of the United States and Gulf of Mexico, although the extent of its southern distribution remains uncertain. The two species have a genetic divergence ranging from 5.18 to 7.29% for the molecular marker analyzed. Based on a comparative study of syntypes of three taxa previously considered synonyms of C. vittatus, and examination of museum specimens, together with recent field observations, we conclude that the confounded species should be assigned the name C. symmetricus (Randall, 1840). A lectotype is selected for this resurrected name, with Suriname as type locality. The distribution of C. symmetricus has been found to include with certainty the western and southern Caribbean, and coast of Venezuela to Brazil, although it is possible that it may occur more broadly in the Caribbean, the Antilles, or southern Gulf of Mexico. Morphologically, the two species differ only in color pattern of the lateral surface of carpi of the second and third pereiopods. A redescription of C. symmetricus is presented, including illustrations, photographs, and discussion of taxonomy, coloration, and distribution. A phylogram is included showing relationships with selected species of Clibanarius. K EY W ORDS: Barcoding COI, Clibanarius, mitochondrial genes, taxonomy, western Atlantic DOI: 10.1163/1937240X-00002277 I NTRODUCTION The diogenid genus Clibanarius Dana, 1852 includes 59 species worldwide (McLaughlin et al., 2010), the majority of which are found in the intertidal to shallow waters of the littoral zone of tropical and subtropical regions, where they often occur abundantly and are ecologically important (Southward and Southward, 1977; Lowery and Nelson, 1988; Gherardi and Vannini, 1993; Kelly and Turner, 2011). Clibanarius was briefly diagnosed by Dana (1852), and even to this day species of this genus can be characterized by only a few shared characters, such as: presence of 13 pairs of biserial gills; elongate, subrectangular shield, and short rostrum; ocular acicles close together; antennal flagella usually but not always, with short setae; endopodite of first maxilliped with a well-developed recurved lobe; chelipeds equal or subequal, with fingers opening horizontally and ending in spoon-shaped corneous tips; and both sexes with four left biramous pleopods on each of pleonal somites 2-5 (Forest and de Saint Laurent, 1968; Rahayu and Forest, 1993). Many species of Clibanarius, however, are anatomically so similar ∗ Corresponding that they can only be separated by using their often subtle color differences while alive or freshly preserved, as all vestiges of coloration eventually disappear after preservation. In the western Atlantic, five species of Clibanarius are currently recognized: C. antillensis Stimpson, 1859, C. foresti Holthuis, 1959, C. sclopetarius (Herbst, 1796), C. tricolor (Gibbes, 1850) and C. vittatus (Bosc, 1802). One other western Atlantic species formerly assigned to Clibanarius, C. anomalus A. Milne-Edwards and Bouvier, 1893, was shown by Forest (1989) not to fit the diagnosis and typical shallow water distribution of species of this genus, and was placed in his new genus Bathynarius Forest, 1989 along with a closely related eastern Atlantic species, C. albicinctus Alcock, 1905. The five western Atlantic species that remained in Clibanarius have been considered valid at least since Forest and de Saint Laurent (1968) who synonymized a number of names with one or more of these five species. Most notably, they considered C. cubensis de Saussure, 1858, a name often still used in the literature of western Atlantic hermit crabs (e.g., Schmitt, 1935, 1936; Provenzano, 1959; Sánchez and Campos, 1978; author; e-mail: [email protected] © The Crustacean Society, 2014. Published by Brill NV, Leiden DOI:10.1163/1937240X-00002277 NEGRI ET AL.: RESURRECTION OF CLIBANARIUS SYMMETRICUS Rodríguez, 1980; Martínez Campos et al., 2012), as a junior synonym of C. sclopetarius. Of the five western Atlantic species of Clibanarius, C. vittatus or “thinstriped” hermit crab (Williams et al., 1989; McLaughlin et al., 2005), has been by far the most studied, and a large number of studies have focused on various biological aspects of this abundant species throughout its traditionally presumed broad geographic range from the southeastern coast of the United States to Brazil (e.g., Hazlett, 1966, 1981; Lowery and Nelson, 1988; Ruppert and Fox, 1988; Harvey, 1996; Turra and Leite, 2001, 2004, 2007; Hess and Bauer, 2002; Sant’Anna et al., 2006, 2009; Mantelatto et al., 2010; Kelly and Turner, 2011). The similarity in morphology between C. vittatus and C. sclopetarius was discussed by Holthuis (1959) who proposed that the two could be differentiated based on shape of rostrum, length of ocular peduncles relative to shield width, fifth antennal segment width, and differences in coloration of stripes of ambulatory legs. However, except for color differences, Forest and de Saint Laurent (1968) considered all these characters variable and useful only in distinguishing specimens of intermediate size. Recently, Negri et al. (2012) used molecular methods to test whether the subtle but clear differences in striped coloration pattern of the ambulatory legs traditionally used to separate these two species, actually supported their separation into distinct species. While their genetic analysis confirmed conclusively that C. sclopetarius is a separate species, they also found that the specimens used of C. vittatus separated into two subgroups, one from Brazil and another from the Gulf of Mexico. Negri et al. (2012) found high molecular divergences for two mitochondrial genes (cytochrome oxidase I and 16S rDNA) between these two subgroups, suggesting the existence of a cryptic species confounded under the name C. vittatus. Negri et al. (2012) did not formally take taxonomic action to divide the latter species, and instead suggested that more specimens and samples from intermediate regions between the northwestern and southwestern Atlantic were needed in order to confirm the existence of a taxon confounded under the name C. vittatus. In this study, we now use a geographically expanded specimen and molecular database to retake the Negri et al. (2012) analysis of populations of C. vittatus traditionally considered under that name, and test further whether indeed those populations represent two species. Three names have so far been considered synonyms of Bosc’s (1802) C. vittatus, a species described based on specimens from the Carolinas (“côtes de la Caroline”) on the southeastern coast of the United States: Pagurus symmetricus, Randall, 1840 (transferred by Dana (1852) to Clibanarius), C. speciosus Miers, 1877, and C. cayennensis Miers, 1877 (Holthuis, 1959; Forest and de Saint Laurent, 1968; McLaughlin et al., 2010). Here we argue, based on molecular and morphological (coloration) evidence and using phylogenetic methods, that Bosc’ name should apply to northern populations of C. vittatus sensu lato from at least the southeastern coast of the United States and Gulf of Mexico, whereas Randall’s name, C. symmetricus, should be resurrected and applied to southern populations of C. vittatus sensu lato ranging from at least Belize in the southwestern Caribbean to Brazil. A redescription of C. symmetricus, 849 the sixth western Atlantic species in the genus, is provided even though its morphology is highly variable and similar to other congeners from the region, along with a taxonomic discussion, illustrations, and photographs to document color differences between this species, and C. vitattus sensu stricto. The distributions of C. symmetricus and C. vittatus sensu stricto are ascertained based on genetically sampled specimens, taxonomic reports that have included sufficient information on coloration, unreported specimens deposited in museums with color patterns still visible, and our own collections. M ATERIALS AND M ETHODS Specimens and Taxonomy In order to find stronger support for the molecular findings by Negri et al. (2012), we studied the morphology and molecular genetics of specimens recently collected by us or supplied by our colleagues from Venezuela to Brazil, and deposited in the Crustacean Collection, Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo, São Paulo, Brazil (CCDB). We compared the morphology of our recently collected specimens with those historically identified as C. vittatus from northern to southern localities, deposited in the National Museum of Natural History, Smithsonian Institution, Washington DC, USA (USNM), and examined photographic records of specimens in the holdings of the University of Louisiana at Lafayette Zoological Collection, Lafayette, LA, USA (ULLZ). We examined syntypes of C. symmetricus, deposited in the General Invertebrates Collection of the Academy of Natural Sciences, Drexel University, Philadelphia, PA, USA (ANSP); and also the syntypes of C. cayennensis Miers, 1877 and C. speciosus Miers, 1877, which remain deposited in the National History Museum, London, UK (NHM). Specimens listed in Table 1 have come from: CCDB; Natural History Museum and Institute, Chiba, Japan (CBM ZC); National Taiwan Ocean University, Keelung, Taiwan (NTOU); and Instituto de Ciencias del Mar, Universitad de Barcelona, Barcelona, Spain (ICM UB). We follow Schram and Koenemann (2004) in the use of “pleon” instead of “abdomen.” Shield length (sl) was measured from the tip of the rostrum to the midpoint of the posterior margin of the cephalothoracic shield. Other abbreviations used are: USFC, United States Fish Commission; sta, station. Photographs were taken using a stereomicroscope with a camera Leica® DFC295. In the synonymy of C. symmetricus, only taxonomic references are considered. No attempt has been made to elucidate the true identity of specimens used in the numerous studies that have been published on ecological or other biological aspects of C. vittatus sensu lato, in part because the deposition of specimens is unknown or not extant, or if extant, have lost their coloration and cannot be reliably identified, although identity assumptions can sometimes be made based on the geographical origin of the samples. Molecular Phylogenetic Analysis A phylogram based on the barcode region of the mitochondrial gene cytochrome oxidase subunit I (COI) was generated with 24 sequences of C. symmetricus and 13 of C. vittatus sensu stricto, from 9 and 4 different localities, respectively, and 14 sequences of 13 other species of Clibanarius. We used 10 sequences of individuals from one paguroid (Pagurus) and two lithodoid genera (Lithodes, Paralithodes) to serve as the outgroup (Table 1). DNA was extracted and the region of interest was amplified and sequenced following protocols of Schubart et al. (2000), with modifications according to Mantelatto et al. (2006, 2007, 2009), Pileggi and Mantelatto (2010) and Vergamini et al. (2011). Most of the sequences were generated by the Laboratory of Bioecology and Crustacean Systematics (LBSC), Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto (FFCLRP), University of São Paulo (USP), as part of a long-term study on the molecular taxonomy of hermit crabs. Additional sequences, including those of the outgroup, were retrieved from GenBank. First, DNA was extracted from muscle tissues extracted from cheliped articulations. Muscle was ground and incubated for 24 h in 600 μl of lysis buffer and 200 μl of proteinase K at 65°C; proteins were separated by the addition of 200 μl of 7.5 M ammonium acetate prior to centrifugation. DNA 850 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 34, NO. 6, 2014 Table 1. List of specimens used for molecular analysis, with date and collection site, voucher number and GenBank accession numbers. Superscript numbers refer to areas sampled along São Paulo coast, each indicating a locality (also indicated in Fig. 1A). JSDN is not an institute code. Superscript letters after GenBank acccession numbers indicate publications: a, Hirose et al. (2010); b, Hall et al. (unpublished); c, Yanagimoto, T. (unpublished); d, Ahyong and Chan (2010); e, Grant and Cheng (2012); f, García-Merchán et al. (2012); g, Kelly and Palumbi (2010); h, Young et al. (2002); i, Matzen da Silva et al. (2011). Country state abbreviations: BA, Bahia; FL, Florida; PA, Pará; PR, Paraná; RJ, Rio de Janeiro; SC, Santa Catarina; SP, São Paulo. Species Collection site, date Catalogue No. Clibanarius corallinus (H. Milne Edwards, 1848) Clibanarius demani Buitendijk, 1937 Clibanarius erythropus (Latreille, 1818) Clibanarius eurysternus (Hilgendorf, 1879) Clibanarius lineatus (H. Milne Edwards, 1848) Clibanarius longitarsus (De Haan, 1849) Clibanarius merguiensis De Man, 1888 Clibanarius symmetricus (Randall, 1840) Okinawa, Japan Okinawa, Japan Cadiz, Spain, Oct 2001 Okinawa, Japan Porosi, Nicaragua, Nov 2001 Okinawa, Japan Okinawa, Japan Isla Margarita, Venezuela, May 2006 Clibanarius symmetricus (Randall, 1840) Bragança, PA, Brazil, May 2010 Clibanarius symmetricus (Randall, 1840) Ilhéus, BA, Brazil, Mar 2009 Clibanarius symmetricus (Randall, 1840) Clibanarius symmetricus (Randall, 1840) Clibanarius symmetricus (Randall, 1840) Clibanarius symmetricus (Randall, 1840) Paraty, RJ, Brazil, Aug 2007 Ubatuba, SP, Brazil, Apr 20113 São Sebastião, SP, Brazil, Jun 20022 Ilha Comprida, SP, Brazil, Apr 20111 Clibanarius symmetricus (Randall, 1840) Guaratuba, PR, Brazil, Feb 2008 Clibanarius symmetricus (Randall, 1840) Florianópolis, SC, Brazil, Jul 2003 Clibanarius rhabdodactylus Forest, 1953 Clibanarius sclopetarius (Herbst, 1796) Clibanarius sclopetarius (Herbst, 1796) Clibanarius striolatus Dana, 1852 Clibanarius signatus Heller, 1861 Clibanarius tricolor (Gibbes, 1850) Clibanarius virescens (Krauss, 1843) Clibanarius vittatus sensu stricto (Bosc, 1802) Okinawa, Japan Bocas del Toro, Panama, Aug 2011 São Sebastião, SP, Brazil, May 2010 Okinawa, Japan Qeshm Island, Iran, Feb 2006 Cozumel, Mexico, Oct 2010 Okinawa, Japan Island Sanctuary, FL, USA, Sep 20114 Clibanarius vittatus sensu stricto (Bosc, 1802) Choctawhatchee Bay, FL, USA, Jul 20015 Clibanarius vittatus sensu stricto (Bosc, 1802) Clibanarius vittatus sensu stricto (Bosc, 1802) Texas, USA, Sep 2001 Mecoacan, TC, Mexico, Feb 2011 Lithodes confundens Macpherson, 1988 Lithodes longispina Sakai, 1971 Lithodes formosae (Ahyong and Chan, 2010) Paralithodes camtschaticus (Tilesius, 1815) Pagurus alatus Fabricius, 1775 Pagurus hirsutiusculus (Dana, 1851) Pagurus longicarpus Say, 1817 Pagurus pubescens Kröyer, 1838 Pagurus samuelis (Stimpson, 1857) Pagurus venturensis Coffin, 1957 Not available Not available Yilan County, Taiwan, Jun 1998 Not available Not available Alaska, USA, 2007 Mohane Bay, Nova Scotia, Canada Barents Sea, Norway, Oct 2004 Santa Barbara, USA, 2007 Santa Barbara, USA, 2008 AB507374a AB496940a JN671592 AB496942 JN671594 AB496944a AB496945a KM101462 KM101463 CCDB 2944 JN671540 JN671541 JN671542 JN671543 JN671544 CCDB 2907 JN671550 JN671545 JN671546 CCDB 2237 JN671548 CCDB 1651 JN671547 CCDB 2947 JN671549 CCDB 3363 JN671551 JN671552 JN671553 JN671554 JN671555 CCDB 2262 JN671556 JN671557 JX238505 CCDB 2946 JN671558 JN671559 JN671560 CBM ZC 9593 AB496946a CCDB 3563 JQ805895 CCDB 2961 JN671584 CBM ZC 9624 AB507376a CCDB 3694 JN671590 CCDB 504 JN671593 CBM ZC 9621 AB507377a CCDB 3783 JX238506 JX238507 JX238508 CCDB 1189 JN671530 JN671531 JN671532 CCDB 1185 JN671533 CCDB 3364 JN671534 JN671535 JN671536 JN671537 JN671538 JN671539 Not available HM020901b Not available AB476814c NTOU A01090 GU289678d Not available JF738248e ICM UB Pala01_01 JN564864f Not available GU442450g Not available AF483113h JSDN 22 JQ305956i Not available GU443074g Not available GU442190g was precipitated by the addition of 600 μl of cold absolute isopropanol, followed by centrifugation; the resulting pellet was washed with 70% ethanol, dried, and resuspended in 20 μl of TE buffer. The final DNA concentration was measured using NanoDrop® 2000 Spectrophotometer (Thermo Scientific). GenBank accession No. (COI) CBM ZC 9622 CBM ZC 9585 CCDB 488 CBM ZC 9588 CCDB 2444 CBM ZC 9583 CBM ZC 9592 CCDB 4531 Polymerase chain reaction (PCR) was used to amplify a fragment of approximately 700 base pairs of the COI in a PxE0.2 (Thermo Electron Corporation) or a Veriti 96-Well (Applied Biosystems) Thermal Cyclers (thermal cycles: initial denaturing for 2 min at 94°C; annealing for 35 cycles: 30 s at 94°C, 30 s at 46-50°C, 1 min at 72°C; final extension NEGRI ET AL.: RESURRECTION OF CLIBANARIUS SYMMETRICUS 2 min at 72°C). Two pairs of primers were used: COH6 (5 -TADACTTCD GGRTGDCCAARAYCA-3 ) and COL6b (5 -ACAAATCATAAAGATAT YGG-3 ) (Schubart and Hubert, 2006); LCO-1490 (5 -GGTCAACAAATC ATAAAGATATTG-3 ) and HCO-2198 (5 -TAAACTTCAGGGTGACCAA AAAATCA-3 ) (Folmer et al., 1994). PCR products were purified using the kit SureClean Plus® and then a second PCR using the same primer set was run with the ABI BigDye® Terminator Mix (Applied Biosystems, Carlsbad, CA, USA) and the products of this second PCR were sequenced (forward and reverse directions) in an ABI Prism 3100 Genetic Analyzer® (Applied Biosystems automated sequencer) following Applied Biosystems protocols. Sequences were assembled, cleaned and edited from two strands sequences to obtain a consensus sequence using the computational program BioEdit 7.0.5 (Hall, 2005). Multiple sequences aligning were performed with the aid of Clustal W (Thompson et al., 1994) with an interface to BioEdit (Hall, 2005) with default parameters. The molecular tree was constructed using a Maximum Likelihood (ML) analysis conducted in the RAxML v.7.0.4 program (Stamatakis, 2006) through the online version of the Cyber Infrastructure for Phylogenetic Research (CIPRES) website (Stamatakis et al., 2008; Miller et al., 2010). The default parameters of RAxML were used to perform the analysis for the GTR model of evolution. To measure the consistency of the topology, we selected the option to automatically determine the number of bootstraps to be run in RAxML. Consequently, 950 bootstrap pseudo-replicates were run, and only values > 50% were reported. R ESULTS Molecular Analysis The final multiple sequence alignment included 595 bp. The nucleotide frequencies were: A = 0.291596, C = 0.194360, G = 0.174043, T = 0.340001; the substitution rates were: A-C = 4.029421, A-G = 31.580560, A-T = 13.918809, C-G = 2.225914, C-T = 89.881667, G-T = 1.000000; the proportion of invariable sites I = 0.565802; and alpha parameter α = 1.289298. When the genetic relationships of C. vittatus sensu lato with other congeners were analyzed in a phylogram (Fig. 1A), a clear separation was shown in the tree between specimens from the Gulf of Mexico (indicated as C. vittatus sensu stricto), and those from Venezuela to Brazil (indicated as C. symmetricus), with a genetic divergence ranging from 5.18 to 7.29%, and a strong bootstrap value of 91. Thus, based on this molecular data and phylogenetic analysis, it is clear that one species, C. vittatus sensu stricto, occurs in the northern portions of the western Atlantic, at least in the Gulf of Mexico, whereas another species previously confounded under the name C. vittatus sensu lato, herein assigned to C. symmetricus, occurs in the southern portions of the western Atlantic, at least from Venezuela to Brazil (Table 1, Fig. 1). Systematics Diogenidae Ortmann, 1892 Clibanarius symmetricus (Randall, 1840) Figs. 1A-C, 2B, C, 3-5 Pagurus symmetricus Randall, 1840: 133 (type locality: Suriname, restricted by lectotype selection). Clibanarius symmetricus – Dana, 1852: 464. Clibanarius vittatus – Smith, 1869: 18, 39; Rathbun, 1900: 144; Moreira, 1901: 28; Alcock, 1905: 160; Holthuis, 1959: 141, Figs. 26a, b, 27; Williams, 1965: 120 (in part), Fig. 97 (see Remarks); Forest and de Saint-Laurent, 1968: 104; Coelho and Ramos, 1972: 170; Sánchez and Campos, 1978: 32, Fig. 9; Williams, 1984: 195 (in part), Fig. 135 (see Remarks); Coelho and Ramos-Porto, 1986: 52; Abele and Kim, 1986: 339 (in part), unnumbered fig. e, d (see Remarks); Coelho-Santos and Coelho, 1995: 163, 169, Fig. 2b, 170; Rieger, 1997: 422; Melo, 1999: 56, 851 Fig. 14; Nucci, 2002: 29, Figs. 13, 14; Batista-Leite et al., 2003: 227; Almeida et al., 2006: 11; Coelho et al., 2007: 9; Martínez Campos et al., 2012: 248, tbl. 4; Negri et al., 2012: 563, Figs. 1, 2, tbls. 1-3 (in part), Fig. 4 (see Discussion). Clibanarius cayennensis Miers, 1877: 657, pl. 66, Fig. 1 (type locality by monotypy: Cayenne, French Guiana). Clibanarius speciosus Miers, 1877: 658, pl. 66, Fig. 3 (type locality by lectotype selection herein: Rio de Janeiro, Brazil). ?Clibanarius vittatus – Ives, 1891: 208, pl. 5, Fig. 3; Provenzano, 1959: 367, Fig. 5d; Rodríguez, 1980: 224; Voss, 1976: 92, 93 (unnumbered fig.); Gómez Hernández and Pérez P., 1984: 30; Gómez Hernández and Martínez-Iglesias, 1986: 26; Williams et al., 1989: 29; Markham et al., 1990: 425; Hernández Aguilera et al., 1996: 47; Strasser and Price, 1999: 37; Raz-Guzman et al., 2004: 628; Rodríguez-Almaraz and Zavala-Flores, 2005: 275, not Fig. 7, lam. 8B; McLaughlin et al., 2005: 241; Felder et al., 2009: 1068 (see Discussion). Type Material.—Lectotype herein selected (dry, sex undetermined due to damaged condition of ventral part of thorax and missing pleon) sl 11.2 mm, Suriname, no other data, coll. Dr. Herring (ANSP 3229); paralectotype, 1 dry specimen (sex undetermined) sl 9.5 mm, “East Indies,” [no other data], coll. J. Longstreth (ANSP 3229). Holotype of Clibanarius cayennensis Miers, 1877: 1 male (dry) sl 10.2 mm, Cayenne, French Guyana (NHM 1879.21.1). Lectotype herein selected of Clibanarius speciosus Miers, 1877: 1 male (dry) sl 9.5, mm, Rio de Janeiro, Brazil, no other data (NHM 1850.7). Additional Material Examined.—Caribbean. Belize: 3 males (sl 9.6-14.3 mm), near Belize City, USNM 21380. Panama: Smithsonian Biological Survey of Panama Canal: 1 male (sl 11.3 mm), Fox Bay, Canal Zone, Colón, 3 January 1911, coll. Meek & Hildebrand, USNM 44195; 1 male (sl 6.3 mm), [same locality as previous], 22 January 1912, USNM 1076269; 1 ovig. female (sl 4.5 mm), Canal Zone, Colon, 31 March 1911, coll. Meek & Hildebrand, USNM 44196; 1 male (sl 5.4 mm), Bahía de Portobelo, 24 April 1911, coll. Meek & Hilderbrand, USNM 44197; 2 males (sl 4.8, 5.6 mm), 2 females (sl 3.8, 4.1 mm), Gatún Locks, lower east chamber wall, sta. 177, 9°16 40 N, 79°55 30 W, 5 March 1974, coll. M. Jones, USNM 1249512; 2 males (sl 5.8, 5.9 mm), 2 females (sl 4.7, 4.9 mm), 5 ovig. females (sl 5.0-5.9 mm), [same sta and date as previous], USNM 1249513; 2 males (sl 4.2, 6.8 mm), 3 females (sl 4.14.3 mm), [same sta and date as previous], USNM 1249510; 6 males (sl 4.5-7.2 mm), 1 female (sl 5.2 mm), 3 ovig. females (sl 4.6-5.4 mm), Gatún Locks, lower W chamber outer sill, sta. 81-9 P, 20 March 1972, coll. M. Jones, USNM 1249511. Colombia: 1 ovig. female (sl 7.8 mm), Bahia Cispata, Gulf of Morrosquillo, 0.5 mile into channel to Ciénaga de Soledad, ∼3 m, 6 January 1995, coll. R. Lemaitre & D. L. Felder, USNM 1093268; 10 males (sl 5.711.7 mm), Sabanilla [Puerto Colombia], USFC Albatross, [shore collection], 16 March 1884, USNM 7572. Venezuela: 2 males (sl 8.9, 11.3 mm), Isla Margarita, Punta Pescadores, 09°53 N, 61°35 W, 18 May 2006, coll. Julian Mora-Day, CCDB 4531 (DNA voucher). Trinidad and Tobago: 16 males (sl 5.3-11.9 mm), 12 females (sl 5.2-6.9 mm), 2 ovig. females (sl 6.8, 6.9 mm), 7 in shells (not sexed or measured), Trinidad, USFC Albatross, [shore collection], [no day, 852 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 34, NO. 6, 2014 Fig. 1. A, Phylogram showing relationships among selected species of Clibanarius Dana, 1852, inferred from ML analysis of COI sequences. Numbers below branches are bootstrap values (950 replicates); only values higher than 50% are shown and only for largest clades (superscript indicates locality of specimen, see also Table 1; country state abbreviations: USA: FL, Florida; TX, Texas; Mexico: QR, Quintana Roo; Brazil: AL, Alagoas; BA, Bahia; CE, Ceará; ES, Espírito Santo; PA, Pará; PE, Pernambuco; PI, Piauí; PR, Paraná; RJ, Rio de Janeiro; RN, Rio Grande do Norte; SC, Santa Catarina; SP, São Paulo). B, C: Clibanarius symmetricus (Randall, 1840), male sl 8.0 mm, Trincheira Beach, Ilha Comprida, São Paulo, Brazil, CCDB 3363. D, E: Clibanarius vittatus sensu stricto (Bosc, 1802), male sl 16.0 mm, Barrier Island Sanctuary, Florida, USA, CCDB 3695. B, D: right chela, dorsal view; C, E: carpus of third pereiopod, lateral view. Scales: B, C, 2 mm; D, E, 5 mm. month] 1884, USNM 7644. Atlantic coast of South America. French Guyana: 3 males (sl 5.5-7.1 mm), Cayenne, Rémiré Beach, 04°53 S, 52°15 W, 25 September 2000, collector not informed, MZUSP 16171. Brazil: Pará State: 5 males NEGRI ET AL.: RESURRECTION OF CLIBANARIUS SYMMETRICUS Fig. 2. Right chela, dorsolateral view. A, Clibanarius vittatus sensu stricto (Bosc, 1802): male, sl 10.9 mm, Choctawhatchee Bay, Florida, USA, CCDB 1189. B, C, Clibanarius symmetricus (Randall, 1840): B, lectotype, sex undetermined, sl 11.2 mm, Suriname, ANSP 3229; C, male, sl 11.6 mm, Macapá Mangrove, Piauí, Brazil, CCDB 2905. Scale: 6 mm. (sl 6.1-8.5 mm), Urujuçuaba Beach, Bragança, 00°49 S, 46°36 W, 27 May 2010, coll. F. Abrunhosa, CCDB 2944 (DNA voucher); Piauí State: 1 male (sl 11.6 mm), Macapá Mangrove, Macapá, 02°54 S, 41°26 W, November 2004, coll. L. C. Fernandes-Góes and J. M. de Góes, CCDB 2905; Paraiba State: 1 male (sl 7.3 mm), Mamanguape stone reef, Branner-Agassiz Expedition, 23 June 1899, USNM 25771; 6 males (sl 3.1-5.2 mm), Rio Paraiba do Norte, Cabedelo, Branner-Agassiz Expedition, on mangroves, 20 June 1899, USNM 25773; Alagoas State: 1 male (sl 6.4 mm), Maceió, Branner-Agassiz Expedition, coral reef, [no date], USNM 25772; Bahia State: 3 males (sl 5.5-6.8 mm), Maramata Beach, Ilhéus, 14°48 S, 39°02 W, 31 March 2009, coll. A. O. Almeida and F. L. Mantelatto, CCDB 2907 (DNA voucher); Rio de Janeiro State: 1 male (sl 11.9 mm), Rio de Janeiro, [no other precise locality or date], USNM 48307; 1 male (sl 8.1 mm), Pontal Beach, Paraty, 23°12 S, 44°42 W, 17 August 2007, coll. F. L. Mantelatto, CCDB 2237 (DNA voucher); São Paulo State: 1 male (sl 8.6 mm), Itaguá Beach, Ubatuba, 26°27 S, 45°03 W, 04 April 2004, coll. R. Robles, CCDB 1651; 8 males (sl 6.8-9.2 mm), Araçá mangrove, São Sebastião, 23°48 S, 45°24 W, June 2002, coll. F. L. Mantelatto, CCDB 2947 (DNA voucher); 3 males (sl 9.0-10.0 mm), Araçá mangrove, São Sebastião, 23°48 S, 45°24 W, 17 December 2002, coll. F. L. Mantelatto, CCDB 1427; 6 males (sl 6.0-8.0 mm), Trincheira Beach, Ilha Comprida, 24°54 S, 47°45 W, 17 April 2011, coll. F. L. Mantelatto, M. Negri, N. Rossi, and R. Buranelli, CCDB 3363 (DNA voucher). Paraná State: 2 males (sl 8.1, 8.8 mm), Brava Beach, Guaratuba, 25°21 S, 48°34 W, 20 February 2008, coll. F. L. Mantelatto and E. C. Mossolin, CCDB 2277 (DNA voucher); Santa Catarina State: 1 male (sl 6.2 mm), Sambaqui Beach, 27°29 S, 48°32 W, 16 April 2007, coll. F. L. Mantelatto, E. C. Mossolin, L. A. G. Pileggi and L. S. Torati, CCDB 1889 (DNA voucher). Comparative Material of Clibanarius vittatus Sensu Stricto.—Southeastern United States. Delaware: 2 males (sl 13.0, 16.3 mm), coast of Delaware, [no date], USNM 56474; Virginia: 1 male (sl 5.3 mm), 1 female (sl 5.7 mm), Gunston, Potomac River, 24 June 1881, coll. M. Mcdonald, USNM 4138; 2 males (sl 10.9, 15.2 mm), R/V Fish Hawk, 853 Lynnhaven Inlet, Virginia Beach, 15 July 1916, USNM 56473; North Carolina: 5 males (sl 5.4-15.9 mm), 5 females (sl 5.5-10.4 mm), Carteret County, Beaufort, USNM 42547; South Carolina: 3 males (sl 7.9-11.8 mm), 6 females (5.211.6 mm), Charleston Harbor, 32°45 00 N, 79°52 59 W, coll. M. Mcdonald, USNM 4141; Georgia: 1 female (sl 6.0 mm), Black Beard Creek, Sapelo Island, [no month, day] 1962, coll. M. Gray, USNM 150237; Florida: 3 males (sl 13.2-15.9 mm), 1 female (sl 7.2 mm), Indian River Lagoon, Barrier Island Sanctuary, 27°54 N, 20°28 W, 20/21 September 2011, coll. B. O’Neill, CCDB 3783; 4 males (sl 8.812.3 mm); 1 male (sl 6.7 mm), Coral Gables, [no date], coll. J. Pearson, USNM 77413. Gulf of Mexico. Florida: Florida Keys: 2 males (sl 9.5, 9.8 mm), 1 female (sl 11.2 mm), Dry Tortugas, Bush Key Reef, Tortugas Expedition Carnegie Lab, sta 46-32, 15 July 1932, coll. R. Stone & W. Schmitt, USNM 265325; Choctawhatchee Bay, 30°27 N, 86°21 W, 20 July 2001, coll. F. L. Mantelatto and R. Robles, CCDB 1189; 3 males (sl 15.6-16.1 mm), Eagle Harbor, Cape Saint Joe, 29°46 N, 85°24 W, 01 April 2011, coll. D. Peiró and J. Rasch, CCDB 3695; Mississippi: 3 males (sl 10.4-11.8 mm), mouth of Mississippi River, [no day, month] 1891, coll. H. Ward, USNM 42546; Louisiana: 92 males (sl 3.5-10.3 mm), 54 females (sl 5.6-7.6 mm), Grand Terre Island, <1 m, 2 November 1999, coll. G. Hess, USNM 1009413; Texas: 2 males (sl 9.1, 9.8 mm), jetty rocks, Port Aransas, 25 November 1945, coll. J. Hedgpeth, USNM 1249514. Mexico: Tabasco State: 1 male (sl 7.7 mm), Puerto Cieba, intertidal, 5 July 2002, coll. D. L. Felder et al., ULLZ 10292 (photo voucher); 6 males (sl 10.3-16.0 mm), Mecoacan Lagoon, Mecoacan, 18°23 N, 93°08 W, 25 February 2011, coll. E. Barba, CCDB 3364. Redescription.—Gills biserial. Shield (Figs. 3A, 5) about as long as broad or slightly longer than broad (on average 1.1 as long as broad). Rostrum short, acutely or bluntly triangular, slightly exceeding lateral projections. Lateral projections broadly triangular, terminating in small blunt or sharp spine. Ocular peduncles (Figs. 3A, 5) length distinctly greater than shield width, corneas weakly dilated. Ocular acicles (Fig. 3A, B) subtriangular, nearly approximate at base, with corneous-tipped spines (1 terminal, 1-3 supplemental spines on lateral margin). Antennular peduncles (Fig. 3A) reaching or sometimes slightly exceeding distal margins of corneas when fully extended. Ultimate and penultimate segments unarmed. Basal segment with spine on inner ventrodistal margin, and row of 2-4 spines on laterodistal angle. Antennal peduncles (Fig. 3A, C) reaching or sometimes slightly exceeding distal margins of corneas. Fifth and fourth segments unarmed except for few tufts of setae. Third segment with simple or bifid ventrodistal spine. Second segment with strong spine on dorsodistal angle. First segment with strong ventrodistal spine. Antennal flagella short, reaching to about tips of dactyls of ambulatory legs, with minute, short setae. Antennal acicles (Fig. 3A, C) subtriangular, reaching or slightly overreaching distal margin of fourth segment; with 3-7 mesial spines, of which usually 1-3 terminal and sometimes 1 or 2 on outer margin. Chelipeds equal or weakly subequal. Chelae (Figs. 1B, C, 3D, E, 5) each about 2 times longer than broad (on average 854 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 34, NO. 6, 2014 Fig. 3. Clibanarius symmetricus (Randall, 1840): male, sl 8.0 mm, Trincheira Beach, Ilha Comprida, São Paulo, Brazil, CCDB 3363. A, shield and cephalic appendages (ocular, antennal and antennular peduncles), dorsal view; B, distal half of right ocular acicle, dorsal view; C, right antennal peduncle, dorsal view; D, right cheliped, mesial view; E, right chela, dorsal view. Scales: A, D, E, 5 mm; B, 0.5 mm; C, 2 mm. NEGRI ET AL.: RESURRECTION OF CLIBANARIUS SYMMETRICUS 855 Fig. 4. Clibanarius symmetricus (Randall, 1840): male, sl 8.0 mm, Trincheira Beach, Ilha Comprida, São Paulo, Brazil, CCDB 3363. A, right third pereiopod, lateral view; B-E, merus (E), carpus (D), propodus (C), and dactyl (B) of same, lateral view; F, right fourth pereiopod, lateral view; G, right fifth pereiopod, lateral view; H, telson, dorsal view. Scales: A, 10 mm; B-E, G, 2 mm; F, 4 mm; H, 1 mm. 2.2 as long as broad), dorsal surfaces with numerous small spines and tubercles denser on fingers and distal portion of palm, and scattered tufts of short setae; ventral surface with few, well-spaced blunt spines or tubercles. Fingers terminating in spoon-shaped corneous tips. Carpus with dorsal and lateral surfaces armed similarly to chela but not as dense, dorsodistal margin with 1 or 2 strong, corneoustipped spines on mesial angle, and few tufts of short setae; 856 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 34, NO. 6, 2014 Fig. 5. Clibanarius symmetricus (Randall, 1840): male, sl 10.0 mm, Araçá mangrove, São Sebastião, São Paulo, Brazil, CCDB 4900. Photo by Buranelli, R. C. and L. G. Pileggi. Scale: 10 mm. ventral surface unarmed. Merus with small tubercles and few tufts of short setae on dorsal margin; ventrolateral and ventromesial margins with row of small blunt spines; ventral face unarmed. Ischium with ventromesial margin armed with row of tiny spines. Second and third pereiopods (ambulatory legs, Figs. 4AE, 5) subequal left from right; with tufts of short setae on dorsal, dorsolateral and dorsomesial surfaces. Dactyl (Figs. 4A, B, 5) about 1.1 (second pereiopod) or 1.3 (third pereiopod) as long as propodus, terminating in sharp, curved, corneous claw; with ventrodistal row of corneous spines. Propodus (Figs. 4A, C, 5) about 1.5 times (second pereiopod) or 1.6 times (third pereiopod) as long as carpus; with 2 or 3 blunt spines on ventrodistal margin. Carpus (Figs. 4A, D, 5) about 0.7 (second pereiopod) or 0.8 (third pereiopod) length of merus, with 1 or 2 corneoustipped dorsodistal spines. Merus (Fig. 4A, E) armed with row of small spines throughout ventral margin (second pereiopod), or with few spines distally on ventral margin (third pereiopod). Fourth pereiopod (Fig. 4F) semichelate, with numerous tufts of long setae. Dactyl terminating in corneous claw, with ventrolateral row of small corneous spinules. Propodal rasp well developed, with 10 or more rows of ovate scales. Carpus with strong, corneous-tipped dorsodistal spine. Fifth pereiopod (Fig. 4G) chelate; with numerous tufts of long setae; propodal rasp well developed (occupying about one-third to half of lateral surface of propodus). Uropods markedly asymmetrical, left distinctly larger than right; exopodal and endopodal rasps well developed. Telson (Fig. 4H) asymmetrical, left lobe distinctly larger than right; distal margins of posterior lobes strongly rounded, each with row of spines and long setae, lobes separated by distinct median cleft; lateral indentations distinct. Color (Fresh Specimens).—Shield (Fig. 5) olive-green mottled with lightly colored small spots, and with brownish areas on anterior and lateral regions. Ocular peduncles (Figs. 3A, 5) lightly colored except for darker, olive-green dorsomesial surfaces. Antennal (Figs. 3A, C, 5) peduncles olive green, with whitish longitudinal stripe on dorsal sur- NEGRI ET AL.: RESURRECTION OF CLIBANARIUS SYMMETRICUS faces of fourth and fifth segments; antennal flagella olive green, each with orange stripe. Chelipeds (Fig. 5) overall olive-green with lightly colored spines or tubercles; carpi and meri less darkly colored than chelae, carpi each with two whitish stripes dorsally. Second and third pereiopods (ambulatory legs, Figs. 4A, 5) with distinct, straight white stripes on olive-green background; dactyls, propodi and carpi (Figs. 1C, 4B-D, 5) each with three white stripes (one dorsolateral, and two on lateral surface, the latter two in propodi curving sharply at one or both ends and joining to form elongated rectangle), and lightly colored ventral margin; meri (Fig. 4E) each with white dorsomesial stripe extending throughout segment, and two (second pereiopod) or three (third pereiopod) more or less slightly oblique white stripes not covering entire segment. Distribution.—Western Atlantic, in the Caribbean from at least Belize, Panama, Colombia, Venezuela, Trinidad and Tobago, and northeastern coast of South America from French Guyana to Santa Catarina, Brazil. Usually intertidal or in shallow waters less the 1 m, infrequently ranging to 22 m. Most frequently found in estuarine and mangrove areas. D ISCUSSION Based on molecular and coloration data, C. vittatus sensu stricto can herein be applied with certainty to northern populations from the southeastern coast of the United States and Gulf of Mexico, whereas the species confounded under C. vittatus sensu lato occurs at least in the Caribbean (Belize, Panama, Colombia, Venezuela, Trinidad and Tobago), and northeastern coast of South America from French Guyana to Brazil. As previously mentioned, there are three names that were considered in the past to be synonyms of Bosc’ (1802) C. vittatus and that morphologically could apply to the confounded species: C. symmetricus, C. cayennensis and C. speciosus, all described based on specimens from Suriname, French Guiana and Brazil, respectively (see Holthuis, 1959; Forest and de Saint Laurent, 1968; McLaughlin et al., 2010). We have examined the types of these three taxa, studied the original albeit brief original descriptions, and conclude that, despite inconsistencies or incompleteness in color descriptions and the poor, dry and virtually colorless condition of these type specimens, the most senior name, Randall’s (1940) C. symmetricus, should be adopted for the species previously confounded under C. vittatus sensu lato. Randall (1940) mentioned the color of his species only as “yellowish” and did not indicate any stripes, although it is unclear if he observed fresh or faded, dry specimens. In other respects, Randall’s syntypes exhibit a large body size (sl 9.5, 11.5 mm) and cheliped spination pattern consistent with that observed by us in the genetically analyzed specimens from Venezuela to Brazil. Randall (1940) used two syntype specimens, one from Suriname and another smaller specimen (found severely damaged) from the “East Indies”; in order to fix the name, we herein choose the former syntype specimen as the lectotype for C. symmetricus. We have studied the literature and collections from numerous localities in Venezuela to Brazil, and have not found any specimens from this extense coastline that can be 857 identified genetically or using color patterns, as Clibanarius vittatus sensu stricto, and conclude that this species does not occur along the Atlantic coast of South America. Thus, we are confident that a number of taxonomic studies from that coast of South America that have previously reported C. vittatus sensu lato, are assignable to C. symmetricus (see synonymy entry: C. vittatus). Williams (1965, 1984) and Abele and Kim (1986) did focus on decapods from Florida and the southeastern coast of the United States, but reproduced or used a modified illustration from Holthuis’ (1959) report of C. vittatus from Suriname, which actually represents C. symmetricus. In their genetic analysis of C. vittatus sensu lato, Negri et al.’s (2012) used specimens from the Gulf of Mexico and Brazil, and the latter represent as well C. symmetricus. While it is clear from our genetic analysis that Clibanarius vittatus sensu lato contains two species, C. vittatus sensu stricto and C. symmetricus, it is difficult to determine precisely the extent of their distributions. Because many earlier reports of C. vittatus sensu lato lack information on coloration or the species name is only listed as part of faunistic inventories, and most collections upon which those reports were based are unavailable or if available the specimens have lost coloration, it is not possible to ascertain their true identity. Furthermore, the scarcity of reports or collections of Clibanarius from many areas in the Caribbean and the Antilles (except for Cuba), hinders understanding of the exact ranges of these two species, and whether their ranges overlap or not in those areas. Herein we can confirm, based on color data in USNM specimens, that C. symmetricus occurs at least as far north in the western Caribbean as the coast of Belize. Several studies that have reported C. vittatus sensu lato from the southern portions of the Gulf of Mexico to the Caribbean coast of Yucatán, or the Gulf and Atlantic coasts of southern Florida (Provenzano, 1959; Voss, 1976; Williams et al., 1989; Markham et al., 1990; Hernández Aguilera et al., 1996; Strasser and Price, 1999; Raz-Guzmán et al., 2004; McLaughlin et al., 2005; Felder et al., 2009), and Cuba (Gómez Hernández and Pérez P., 1984; Gómez Hernández and Martínez-Iglesias, 1986), could conceivably include C. symmetricus. Therefore, in our synonymy we consider as questionable (see entry: ?Clibanarius vittatus) a number of reports of C. vittatus sensu lato, as those reports could potentially represent in full or in part, C. symmetricus. However, Rodríguez-Almaraz and Zavala-Flores (2005: Fig. 7, lam. 8B) clearly illustrated a specimen of C. vittatus sensu stricto from Tamaulipas, although they listed numerous specimens from Tamaulipas to Campeche, and thus it is possible that some of their most southerly collected specimens could represent instead C. symmetricus. The study of morphology and molecular analyses using 16S rDNA and barcode COI (Negri et al., 2012 and present study) show that Clibanarius symmetricus and C. vittatus sensu stricto are different but closely related species. The morphology is so similar, however, that the only reliable morphological character that can be used to separate C. symmetricus from C. vittatus sensu stricto, is the coloration pattern on the lateral face of the carpi of the ambulatory legs, although unfortunately the coloration in specimens 858 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 34, NO. 6, 2014 disappears completely after some time in preservative. Holthuis (1959: 145) actually was the first to point out color differences between specimens of C. vittatus sensu lato from Suriname and those from Florida, when he briefly noted that the “bands” [stripes] on the legs in specimens from Suriname were narrower than in those from Florida, although he did not suggest that two species might be involved. We have found that the carpi of the ambulatory legs in C. symmetricus each have three straight, whitish longitudinal stripes, two on the lateral face and one on the dorsal or dorsolateral margin (Fig. 1C). In contrast, the carpi of the ambulatory legs in C. vittatus sensu stricto have four stripes on the lateral face: one straight lateroventral, two submedian and approximate of which the lower stripe is slightly curved proximally and together with the upper stripe form the top of a blunt, posteriorly schewed triangle, and one straight dorsolateral (Fig. 1E). When comparing the morphology of these two species, we observed in some specimens differences in density and sharpness of spines on the dorsal surfaces of the chelae. The spines and tubercles tend to be denser, larger, and usually blunt in C. symmetricus, whereas the spines are not as dense or as large, and are usually sharp, in C. vittatus sensu stricto (Figs. 1B, D, 2A, C). Unfortunately, the difference in spination is of limited value as a differentiating character because of the considerable interspecific overlap in spination of chelae between these two species depending on size of specimens and geographic area. Clibanarius symmetricus resembles C. sclopetarius, from which it differs in telson morphology, chela ornamentation, and color pattern of ambulatory legs. In C. symmetricus, the distal margins of the posterior lobes of the telson are distinctly rounded and divided (Fig. 4H); the dorsal surface of the chelae have dense spines and tubercles (Fig. 1B, 2B, C, 5); and the white stripes on the lateral face of the ambulatory legs are thin, with one median stripe on propodus and two on the dactyl (Fig. 1C, 4A-C) (see Negri et al., 2012: Fig. 4A, C, D as C. vittatus). In C. sclopetarius, the distal margins of the posterior lobes of the telson are broadly rounded or nearly straight, and weakly divided, the chela tubercles and spines are not dense, well spaced, and the white stripes on the lateral face of the ambulatory legs are wide, with one broad, median dark stripe on the propodus continued on the dactyl (see Negri et al., 2012, Fig. 3A, C, D). Clibanarius symmetricus, C. vittatus sensu stricto, C. sclopetarius, and C. foresti, are similar in relative length proportion of propodi and dactyls of ambulatory legs, with dactyls being distinctly longer than propodi, as well as in the striped pattern of coloration on the ambulatory legs. As discussed above, C. symmetricus, C. vittatus sensu stricto and C. sclopetarius are morphologically nearly identical except for subtle differences in color, whereas C. foresti is easily distinguishable from the other three species by its slender ocular peduncles, slender, long antennules that exceed the corneas by more than half the length of the ultimate antennular segments, small size of individuals, and deeper habitat ranging from 7 to 75 m. The remaining western Atlantic species of Clibanarius, C. antillensis and C. tricolor, are morphologically clearly separated by having the dactyls of the ambulatory legs distinctly shorter than the propodi, as well as their significantly different coloration patterns. In conclusion, the use of molecular and morphological data (primarily color) has made possible the resurrection and definition of Clibanarius symmetricus, a species briefly described 174 years ago but considered a junior synonym of C. vittatus sensu lato since Holthuis (1959). The genetic divergences found herein between C. symmetricus and C. vittatus sensu stricto, 5.18-7.29% and 1.4%, for the COI gene and 16S rDNA, respectively, are comparable to interspecific genetic divergences known for other Paguroidea (Mantelatto et al., 2006) and anomurans (Knowlton, 2000; Macpherson and Machordom, 2001, 2005; Mantelatto et al., 2009), or other decapods (Tam et al., 1996; Tam and Kornfield, 1998; Macpherson and Machordom, 2004, 2005). Although coloration is known to vary intraspecifically in some decapod crustaceans (Bauer, 1981; Wilson, 1987; Schubart et al., 2001; Reuschel and Schubart, 2007), we have demonstrated that at least in C. symmetricus and C. vittatus sensu stricto, the relatively minor differences in the patterns of stripes on the ambulatory legs do reflect species distinctness. As result of our study, we recognize six valid western Atlantic species of Clibanarius, three of which (C. antillensis, C. tricolor and C. sclopetarius) are considered to range broadly in the western Atlantic, albeit not always continuously, from the southeastern coast of the United States, and Bermuda, to Brazil (e.g., Felder et al., 2009). The range of C. symmetricus can at present only be confirmed to include the western and southern Caribbean (Panama, Colombia, Venezuela), Trinidad and Tobago, and French Guyana to Brazil, and the range of C. vittatus sensu stricto only the eastern coast of the United States and northern Gulf of Mexico. In contrast, C. foresti seems to have a relatively narrow range, and is so far known only from Suriname to northern Brazil. However, many areas of the Caribbean-Antillean region remain to be sampled for fresh specimens that could be useful for molecular and morphological analyses in order to fully elucidate the distributional picture of the species of Clibanarius. ACKNOWLEDGEMENTS This paper is part of a multidisciplinary research project Temático BIOTAFAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo), which aims to produce a fine-scale assessment of the marine decapod biodiversity of the State of São Paulo. The study was partly supported by scientific fellowships from the Pró-Reitoria de Pesquisa da Universidade de São Paulo (Proc. 2009.1.1233.59.5) and from the Conselho Nacional de Desenvolvimento Científico e Técnológico-CNPq (Proc. 123990/20106, 160133/2011-4) to MN. Additional support for this project was provided by the ongoing PhD fellowship awarded by FAPESP to MN (Proc. 2012/06300-3) and research grants (Temático Biota 2010/50188-8; Coleções Científicas 2009/54931-0) CNPq (Proc. 301359/2007-5; 473050/ 2007-2; 302748/2010-5) to FLM. We are extremely grateful to the Department of Biology and Postgraduate Program in Comparative Biology of the FFCLRP/USP for partial financial support, and to many colleagues and friends (A. Almeida, Á. Costa, B. O’Neill, C. Magalhães, D. Castiglioni, D. L. Felder, D. Peiró, C. Schubart, E. Mossolin, E. Barba, F. Abrunhosa, F. Alvarez, J. Marcos de Góes, J. Cuesta, J. L. Vilallobos, L. Pileggi, L. Góes, M. Tavares, M. H. Goldman, M. Terossi, R. Robles and R. Turner), for their help in collections, making available some essential fresh specimens, lending material from collections used in our research, critical discussion during the preparation of this manuscript, and help in sequencing. Special thanks to D. L. Felder for sharing with us his extensive photographic color files and allowing use of specimen vouchers in ULLZ; A. Asakura for critical NEGRI ET AL.: RESURRECTION OF CLIBANARIUS SYMMETRICUS revisions and advice; P. Callomon and R. Bauer for making possible the examination by us of C. symmetricus syntypes; M. Terossi for the photographs of the types of C. cayennensis and C. speciosus, and all members of LBSC for their assistance during the development of this study. The collections of species conducted in this study complied with current applicable state and federal laws of Brazil (DIFAP/IBAMA/126/05; permanent license to FLM. for collection of Zoological Material No. 11777-1 MMA/IBAMA/SISBIO). R EFERENCES Abele, L. G., and W. Kim. 1986. An Illustrated Guide to the Marine Decapod Crustaceans of Florida. Vol. 8. Florida State University, Department of Environmental Regulation, Technical Series, Tallahassee, FL, 760 pp. Ahyong, S. T., and T. V. Chan. 2010. 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