Zoological Journal of the Linnean Society, 2009, 156, 785–800. With 9 figures The Iberian Peninsula: ancient history of a hot spot of mite harvestmen (Arachnida: Opiliones: Cyphophthalmi: Sironidae) diversity zoj_512 785..800 JÉRÔME MURIENNE1,2 and GONZALO GIRIBET1* 1 Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA 2 UMR 5202 CNRS, Département Systématique et Evolution, case 50, Muséum national d’Histoire naturelle, 45 rue Buffon, 75005 Paris, France Received 15 April 2008; accepted for publication 9 July 2008 The Iberian Peninsula represents a hot spot of cyphophthalmid (mite harvestman) disparity, with four of the eight genera currently recognized in the family Sironidae represented in the region – a generic diversity and morphological disparity not found in any other region of the World so far. From these, two genera (Iberosiro and Odontosiro) are monotypic, and are restricted to the western side of the peninsula. Parasiro is restricted to the north-east region, from the Catalonian Coastal Ranges and both sides of the Eastern Pyrenees, in areas where the annual rainfall surpasses 1000 mm, and mostly restricted to areas with Paleozoic and Variscan rocks, with other species of the genus extending to Corsica, Sardinia, and the Italian Peninsula. A second species of the genus Paramiopsalis, Paramiopsalis eduardoi sp. nov. from Fragas do Eume, is described here along with a re-diagnosis of the genus. Paramiopsalis species, together with Odontosiro, inhabit the north-west corner of the Iberian Peninsula, an area with some of the highest recorded annual rainfall, and with Paleozoic rocks from the Iberian Massif or Variscan granitoid rocks. A phylogenetic analysis of the members of the family Sironidae using four molecular markers, despite not including all of the Iberian genera, clearly shows the non-monophyly of the Iberian Cyphophthalmi, indicating that the Iberian Peninsula is home to multiple ancient lineages of mite harvestmen. The two Paramiopsalis species form a sister clade to the Balkan genus Cyphophthalmus, whereas Parasiro constitutes the first lineage of the sironids represented. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800. doi: 10.1111/j.1096-3642.2008.00512.x ADDITIONAL KEYWORDS: new species – Paramiopsalis – Portugal – Southern Europe – Spain . INTRODUCTION Cyphophthalmi are present in virtually all continental land masses or on islands of continental origin. Within these land masses, peaks of species diversity have been described or observed in such places as New Zealand, Sumatra, Borneo, or the Balkans. These radiations often account for single lineages, although in some cases up to three lineages of independent origin have been observed. Such is the case for New Zealand, which has perhaps the beststudied cyphophthalmid fauna, from a taxonomic *Corresponding author. E-mail: [email protected] and evolutionary point of view (Forster, 1948, 1952; Boyer & Giribet, 2003, 2007, 2009). Only two lineages occur in the much larger land mass of Australia (Boyer & Giribet, 2007), whereas places such as Sumatra and Borneo may host a single or at most two lineages each, despite the large number of species that inhabit those large islands (Clouse & Giribet, 2007). In this article we focus on a land mass that has been isolated from other terranes during a long period of history: the Iberian Peninsula (Fig. 1). This territory is home to just a few species of Cyphophthalmi, which nonetheless belong to four genera, exhibiting greater morphological disparity than any other land mass of equivalent size. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 785 786 J. MURIENNE and G. GIRIBET Paramiopsalis eduardoi* Paramiopsalis sp. O. lusitanicus Paramiopsalis sp. Paramiopsalis ramulosus* O. lusitanicus Paramiopsalis sp. Iberosiro sp. Odontosiro sp. Paramiopsalis sp. O. lusitanicus Parasiro coiffaiti O. lusitanicus Paramiopsalis ramulosus Parasiro coiffaiti* Parasiro coiffaiti ? Parasiro coiffaiti Parasiro coiffaiti* Parasiro coiffaiti Odontosiro lusitanicus Paramiopsalis ramulosus Iberosiro distylos Figure 1. Satellite view centered on the Iberian Peninsula showing the known localities for the Iberian species of Cyphophthalmi. Type localities are identified with the bold font. An asterisk denotes the localities of the specimens used in the molecular study. Localities identified as ‘Paramiopsalis sp.’ are based on specimens listed by Rambla & Fontarnau (1984) as Paramiopsalis ramulosus, but have not been examined by the authors. The type locality for Parasiro coiffaiti is indicated with a question mark because the locality listed for the type material is not from the Girona Province (see Results). Furthermore, a new species of Cyphophthalmi from Galicia is described and illustrated. HISTORY OF CYPHOPHTHALMID RESEARCH IN THE IBERIAN PENINSULA A recent catalogue of the Iberian Opiliones (Prieto, 2004)1 lists four species of Cyphophthalmi for this biogeographical area, namely Parasiro coiffaiti Juberthie, 1956, Odontosiro lusitanicus Juberthie, 1961, Paramiopsalis ramulosus Juberthie, 1962, and Iberosiro distylos de Bivort & Giribet, 2004. Detailed accounts for these species have been provided else1 Although the publication date of this issue of the Revista Ibérica de Aracnología indicates 31.xii.2003, it includes species published in 2004 such as Iberosiro distylos de Bivort & Giribet (2004), and therefore could have not appeared until 2004. where (Rambla & Fontarnau, 1984, 1985, 1986; de Bivort & Giribet, 2004). Older accounts also report the presence of Cyphophthalmus duricorius Joseph, 1868 (as Siro duricorius) as a result of an error perpetuated in the literature (Kraus, 1961; Rambla, 1974), which was corrected later on by Rambla & Fontarnau (1984: 146–147; see also Prieto, 2004; de Bivort & Giribet, 2004). Our knowledge on the Iberian Cyphophthalmi is mostly derived from the work of two of the most prominent European opilionologists: the French Christian Juberthie and the Catalan Maria Rambla. The first three known species from the Iberian Peninsula were all described by C. Juberthie in three different genera, two of which were monotypic (Juberthie, 1956, 1961, 1962). The fourth species also belongs to a monotypic genus (de Bivort & Giribet, 2004). In this article we revise the Iberian cyphoph- © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 CYPHOPHTHALMI IN THE IBERIAN HOT SPOT thalmid fauna, adding a second species for the former monotypic genus Paramiopsalis Juberthie, 1962, and provide a phylogenetic analysis of selected species of the family Sironidae, using four molecular markers in order to test for monophyly of the Iberian lineages. MATERIAL AND METHODS MORPHO-ANATOMY The male holotype and a female paratype of the new species, and the male lectotype of Parasiro coiffaiti, were photographed in dorsal, ventral, and lateral positions using a JVC KY-F70B digital camera mounted on a Leica MZ 12.5 stereomicroscope. A series of images was taken at different focal planes and assembled with the dedicated software package Auto-Montage Pro v5.00.0271 (Syncroscopy). A male paratype was examined using an FEI Quanta 200 Scanning Electron Microscope (SEM), after sputter coating with gold/palladium. Observation and description of Opiliones genitalia are classically conducted using light microscopy. In this paper, we used a novel method of spermatopositor observation using confocal laser scanning microscopy (CLSM; Klaus & Schawaroch, 2006). This study presents the first use of CLSM to describe the structure of a new species. The method relies on the natural fluorescence property of the arthropod cuticle to obtain a stack of 2D sections that can be combined into a 3D object. Regarding the extremely small size and fragility of the structure, observation with light microscopy and preparation for electron microscopy was impossible. In addition, to be relatively fast and 787 easy (with the whole process taking approximately 1 h), this technique is also non-destructive, which is a great advantage when working with collection specimens. After dissection, the spermatopositor was mounted in glycerin between a glass slide and a cover slip, as for observation with light microscopy. Details of experimental protocols can be found in Klaus, Kulasekera & Schawaroch (2003) and Schawaroch, Grimaldi & Klaus (2005). The structure was imaged on a Zeiss LSM 510 meta confocal microscope. Threedimensional visualization was carried out using Maximum Intensity Projection in the Zeiss LSM Image Browser software. TAXON SELECTION In this study, we use 14 species represented by 16 specimens in the molecular data set, including all the available representatives of the Iberian Peninsula, as well as other selected Cyphophthalmi (see Table 1). All previous analyses of cyphophthalmid phylogeny show that Metasiro, once classified within Sironidae, belongs to the family Neogoveidae, and therefore it is used to root the trees. Furthermore, many of our analyses indicate that the genera Parasiro and Suzukielus do not form a clade with the other sironids, or that they are early offshoots of the sironid lineage (Boyer, Karaman & Giribet, 2005; Boyer et al., 2007b), thereby justifying our choice of outgroups. In addition to the phylogenetic analyses, we used three additional specimens of Paramiopsalis ramulosus collected in May 2008 for calculating within- and among-species molecular distances. Table 1. Museum of Comparative Zoology (MCZ) accession numbers and species for all represented taxa used in the molecular analyses, with GenBank accession numbers Family Species Neogoveidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae Sironidae DNA101532 DNA100487 DNA100499 DNA100494 DNA100493 DNA101878 DNA102080 DNA100459 DNA101383 DNA101877 DNA100488 DNA100489 DNA101611 DNA100457 DNA100461 DNA101543 Metasiro americanus Cyphophthalmus duricorius Cyphophthalmus ere Cyphophthalmus martensi Cyphophthalmus minutus Paramiopsalis eduardoi sp. nov. Paramiopsalis eduardoi sp. nov. Paramiopsalis ramulosus Parasiro coiffaiti Parasiro coiffaiti Siro acaroides Siro exilis Siro kamiakensis Siro rubens Siro valleorum Suzukielus sauteri 18S rRNA 28S rRNA 16S rRNA COI DQ825542 AY639461 AY639462 AY639470 AY639473 EU638284 EU638285 AY639489 AY918872 EU638283 AY639490 AY639491 DQ513147 U36998 AY639492 DQ513138 DQ825595 DQ513120 AY639499 AY639505 DQ825591 EU638287 – DQ513121 DQ513122 EU638286 DQ513128 AY639520 DQ513134 DQ825584 DQ513123 DQ513116 DQ825616 AY639526 AY639527 AY639535 AY639537 EU638281 EU638282 AY639550 AY918877 – AY639551 – – – AY639552 DQ518086 DQ825645 AY639556 AY639557 AY639562 AY639565 EU638288 EU638289 DQ825641 DQ825642 – DQ825643 AY639579 DQ513115 DQ513111 AY639580 DQ513108 © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 788 J. MURIENNE and G. GIRIBET MOLECULAR DATA Molecular markers included two nuclear ribosomal genes (complete 18S rRNA, 18S hereafter, and a 1-kb fragment of 28S rRNA, 28S hereafter), one mitochondrial protein-encoding gene, cytochrome c oxidase subunit I, and mitochondrial 16S rRNA (16S hereafter). These markers have proven to be informative in many studies on Opiliones systematics (e.g. Boyer et al., 2005, 2007b). The DNEasy® tissue kit was used for tissue lysis and DNA purification, following the manufacturer’s protocol (Qiagen). Total DNA was extracted by incubating the entire animal or appendage in lysis buffer overnight, as described in Boyer et al. (2005). The intact cuticle of the animal was then removed after the lysis step and kept in ethanol. Purified genomic DNA was used as a template for PCR amplification. The complete 18S (c. 1.8 kb) was amplified in three overlapping fragments of c. 900 bp each, using primers pairs 1F-5R, 3F-18Sbi, and 18Sa2.0-9R (Giribet et al., 1996; Whiting et al., 1997). The first c. 1000 bp of the 28S rRNA was amplified using the primer set 28SD1F/28SrD1a28Sb (Whiting et al., 1997; Park & Ó Foighil, 2000; Edgecombe & Giribet, 2006), or alternatively with the more internal forward primer 28Sa (Whiting et al., 1997). COI was amplified using the primer pair LCO1490/HCOoutout (Folmer et al., 1994; Schwendinger & Giribet, 2005), or alternatively with the more internal reverse primer HCO2198 (Folmer et al., 1994). 16S was amplified with the primer pair 16Sar-16Sb (Xiong & Kocher, 1991; Edgecombe, Giribet & Wheeler, 2002). Polymerase chain reactions (PCR; 50 mL) included 2 mL of template DNA, 1 mM of each primer, 200 mM of dinucleotidetriphosphates (Invitrogen), 1¥ PCR buffer, containing 1.5 mM MgCl2 (Applied Biosystems), and 1.25 units of AmpliTaq DNA polymerase (Applied Biosystems). The PCR reactions were carried out using a GeneAmp PCR System 9700 thermal cycler (Applied Biosystems), and involved an initial denaturation step (5 min at 95 °C), followed by 35 cycles including denaturation at 95 °C for 30 s, annealing (ranging from 44 to 49 °C) for 30 s, and an extension at 72 °C for 1 min, with a final extension step at 72 °C for 10 min. The double-stranded PCR products were verified by agarose gel electrophoresis (1% agarose), and were then purified with a Perfectprep PCR Cleanup 96 system (Eppendorf). The purified PCR products were sequenced directly with the same primer pairs used for amplification. Each sequence reaction contained a total volume of 10 mL, including 2 mL of PCR product, 1 mM of one of the PCR primer pairs, 2 mL ABI BigDye 5x sequencing buffer, and 2 mL ABI Big Dye Terminator v3.0 (Applied Biosystems). The sequencing reactions involved an initial denaturation step for 3 min at 95 °C, and 25 cycles (95 °C for 10 s, 50 °C for 5 s, and 60 °C for 4 min). The BigDye-labelled PCR products were then cleaned using Performa DTR Plates (Edge Biosystems). The sequence reaction products were then analysed using an ABI Prism 3730xl Genetic Analyzer. Chromatograms were edited, and overlapping sequence fragments for each individual were assembled using the software SEQUENCHER 4.7 (Gene Codes Corporation 1991–2007), after BLAST searches (Altschul et al., 1997), as implemented by the NCBI website (http://ncbi.nlm.nih.gov/), were conducted to check for putative contamination. The software package MACGDE: Genetic Data Environment for MacOSX (Linton, 2005) was used to determine fragments based on internal primers and secondary structure features (Giribet & Wheeler, 2001; Giribet, 2002). 18S, 28S, and 16S rRNAs were divided into 2, 9, and 5 fragments, respectively, according to internal primers and secondary structure features. The COI was divided in six fragments. All new sequences have been deposited in GenBank under accession codes EU638281–EU638289 (see Table 1). PHYLOGENETIC ANALYSES Phylogenetic analyses were conducted under Direct Optimization (Wheeler, 1996; Wheeler et al., 2006) with POY version 4.0 RC build 2615 (Varón, Vinh & Wheeler, 2008). Tree searches were conducted under parsimony with 20 random-addition sequences, followed by subtree pruning and regrafting (SPR) and tree bissection and reconnection (TBR), and one round of ratcheting (Nixon, 1999). A detailed description of the commands used to implement this search strategy with the new version of POY can be found in Murienne, Harvey & Giribet (2008). In order to assess nodal stability (Wheeler, 1995; Giribet, 2003a), different parameter sets were used for a range of indel-totranversion and transversion-to-transition ratios. We used ‘111’, ‘121’, ‘211’, and ‘3221’ transformation matrices. It has been argued that the parameter set ‘111’ (often called ‘equal weighting’ or ‘unweighted parsimony’) maximizes explanatory power (Frost et al., 2001), but it requires all indel events to be counted independently. Parameter set ‘3221’ was implemented using the commands transform(tcm:(2,1), gap_opening:3). Nodal support was estimated by jackknifing (Farris et al., 1996; Farris, 1997) with 100 replicates using the command transform (auto_sequence_partition:true), which increases the number of fragments – and thus the number of characters – used for jackknifing. The data for all genes were analysed simultaneously. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 CYPHOPHTHALMI IN THE IBERIAN HOT SPOT Molecular evolutionary analyses for estimating p-distances and the standard error associated for COI sequence data were conducted using MEGA v3.1 (Kumar, Tamura & Nei, 2004). For these analyses we used three additional specimens of Paramiopsalis ramulosus from northern Portugal. PARASIRO RESULTS COIFFAITI JUBERTHIE, 1956 (FIG. 2) Parasiro coiffaiti was described based on an unspecified series of specimens collected by M. H. Coiffait A B C in the Pyrénées-Orientales (France) and Girona Province (Spain) (Juberthie, 1956). The species is endemic to the north-east Iberian Peninsula (provinces of Girona and Barcelona) and south-east of France (Pyrénées-Orientales) (Juberthie, 1957, 1958; Rambla, 1974, 1986), with a relatively broad distribution. Parasiro coiffaiti is found on the slopes of the Eastern Pyrenees, Montnegre, Montseny (a mountain range west of the coastal hills north of Barcelona), and Collserola (the mountain that delimits the city of Barcelona in the west) (Rambla, 1974, 1986; Rambla & Fontarnau, 1985). It preferentially inhabits argillaceous soils or slate, and has also been found in two caves in Tavertet (Osona) and Parc Natural de Sant Llorenç del Munt i Serra de l’Obac (Rambla, 1986). The type material (five males and two females), deposited at the Muséum national d’Histoire naturelle, Paris (MNHN), is supposedly from the Girona Province (Catalonia, Spain), but we were unable to locate the labelled locality ‘Porto de Santigoso’ in Girona, and rather than Catalan, the locality name looks Galician or Portuguese. Santigoso is indeed a rural town in the Galician Province of Ourense, in north-western Spain. Interestingly, most of the remaining Iberian diversity of Cyphophthalmi is in Galicia, and we suspect that the type locality of ‘Porto de Santigoso’ may be a labelling error. Juberthie could not have mistaken Parasiro coiffaiti for any of the Galician or Portuguese species, and therefore we suspect that the labelling error did not affect the specimens contained in the vial. A male from this vial has been designated as the lectotype here, and is illustrated in Figure 2; the remaining four males and two females are designated as paralectotypes. Some of the historical collections that were examined by the authors include the following localities: Olot, Riells, Terrassa, Tavertet (Cova Vora Fosca), and Sant Feliu de Pallerols, all of which are in Catalonia. New collections: Font del Vidre (Berga, Berguedà, Barcelona, Catalonia, Spain), Vall de Fuirosos (Montnegre Massif, Girona, Catalonia, Spain). Parasiro coiffaiti is related to Parasiro corsicus (Simon, 1872) and Parasiro minor Juberthie, 1958, from Corsica, Sardinia, and the Italian Peninsula (Simon, 1872; Juberthie, 1958; Brignoli, 1968; de Bivort & Giribet, 2004). ODONTOSIRO Figure 2. Parasiro coiffaiti Juberthie, 1956, lectotype male. A, dorsal view. B, ventral view. C, lateral view. Scale bars: 0.5 mm. 789 LUSITANICUS JUBERTHIE, 1961 Odontosiro lusitanicus Juberthie, 1961 was originally described from four specimens (one male, two females, and one juvenille) collected by M. H. Coiffait © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 790 J. MURIENNE and G. GIRIBET in Guimarães,2 Portugal (Juberthie, 1961), and was given its own generic status because of the unique combination of type-1 ozophores (as in Parasiro) and the presence of a complete corona analis (as in Siro and Cyphophthalmus). Rambla & Fontarnau (1984) reported two new localities for O. lusitanicus, this time in Spain (in the provinces of Pontevedra and León), and more details on these plus three additional localities in Ourense, Lugo and Asturias were provided by Rambla & Fontarnau (1986). The species is therefore known from its type locality in northern Portugal, and from the notrthwestern Spanish autonomous regions of Galicia, Asturias and León. We have been unable to locate these specimens in the collection of Maria Rambla or at the MNHN. During G. Giribet’s recent collecting trips to Guimarães (Braga), little suitable habitat for Cyphophthalmi was identified, as most forested areas were Eucalyptus plantations. Nearby localities in the Costa Verde of Portugal and Galicia did not yield any specimens of this genus. Odontosiro remains a monotypic genus to date. This is also the only known genus of Sironidae for which no specimen has been examined by the authors. O. lusitanicus has often been collected with P. ramulosus, although the latter tends to be much more abundant (Rambla & Fontarnau, 1986). IBEROSIRO DISTYLOS DE BIVORT & GIRIBET, 2004 A single male specimen from Algarve (cave) da Terra da Rolha, Rocha Forte, Serra de Montejunto (Estremadura, Portugal), collected by A. de Barros Machado in April 1941, and deposited at the MNHN (Paris), was described as yet another monotypic Iberian genus (de Bivort & Giribet, 2004). This species constitutes the southernmost distribution of Iberian Cyphophthalmi. With a length of c. 1.4 mm, similar to that of O. lusitanicus, it combines character states observed in Paramiopsalis and Odontosiro. As in Paramiopsalis, I. distylos has the coxa of the second pair of legs fused to the third coxa, a unique trait within the Sironidae. However, it shares with Odontosiro the ozophore position (which is also similar to that of Parasiro), the type of leg ornamentation, and the anal plate that is devoid of modifications. So far the holotype remains the only known specimens for this species, despite a recent visit (May 2008) to the alleged type locality by G. Giribet. However, a male and a female of a congener have 2 Juberthie only mentioned that the specimens were collected in Guimaraes by Coiffat in the North of Portugal. There are two localities in the North of Portugal named Guimarães, one in the Province of Braga, and another in the Province of Viseu. been recently collected by pitfall trapping in Illano (Asturias), and the specimens were forwarded to the authors by C. Prieto after the first set of proofs of this article. These specimens will be described and discussed in a forthcoming paper. PARAMIOPSALIS JUBERTHIE, 1962 Emended diagnosis: Small sironids with free coxae I; coxae II fused to coxae III and IV. Eyes absent. Ozophores of type II. Sternum absent. Opisthosomal dorsal longitudinal sulcus absent. Posterior border of opisthosoma truncated in males and rounded in females. Opisthosomal tergite IX free, and sternites 8 and 9 medially fused, for most of their length, not forming a corona analis. A single anal gland pore opening on tergite VIII. Basal cheliceral article without dorsal crest. Tarsus and metatarsus of legs I and II smooth; metatarsus of legs III and IV ornamented, but tarsus smooth. Claws of walking legs smooth, without any sort of ornamentation. Tarsus IV of males entire. Adenostyle large, lamelliform, or plumose. Spermatopositor short, with bifurcating dorsal microtrichia with thick bases, and shorter ventral microtrichia with thinner bases. Pars apicalis with hooked mobile digits. Ovipositor long, with a multibranched, sensitive process on each lobe. This diagnosis corresponds to the one provided for the genus by Juberthie (1962: 267), with the exception of the adenostyle type, which is plumose only in the type species of the genus. Included species: Paramiopsalis ramulosus and Paramiopsalis eduardoi sp. nov. Phylogenetic position: In recent molecular analyses (Boyer et al., 2007b; this analysis) the genus Paramiopsalis is currently seen as sister to the genus Cyphophthalmus, but its position has fluctuated within Sironidae in other molecular analyses (Boyer et al., 2005). These analyses did not include the genera Iberosiro or Odontosiro. Morphologically, Paramiopsalis is the closest relative of Iberosiro (de Bivort & Giribet, 2004), although with low support. Unfortunately, Iberosiro specimens are not available for molecular study. PARAMIOPSALIS RAMULOSUS JUBERTHIE, 1962 The third species described for the Iberian Peninsula was also described originally from Portugal, from Pessegueiro, in the Aveiro Province, based on specimens collected by M. H. Coiffait in April 1960. Later, its range was extended to the north-west Iberian Peninsula, with several localities in the provinces of A Coruña, Pontevedra, and León, in Spain (Rambla & © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 CYPHOPHTHALMI IN THE IBERIAN HOT SPOT Fontarnau, 1984). We have not been able to locate the type specimens of the species, and all illustrations appearing in the literature (Rambla & Fontarnau, 1984; de Bivort & Giribet, 2004) are from specimens collected in Moscoso. New collections (see below) from the Costa Verde, in northern Portugal, also belong to this species. With c. 1.8 mm in carapace length, this is the largest Iberian cyphophthalmid species. It was originally described as belonging to the subfamily Stylocellinae (sensu Hansen & Sørensen, 1904), for having the coxa of leg II fused to that of leg III, as do the members of the currently recognized families Stylocellidae, Ogoveidae, and Neogoveidae (Hansen & Sørensen, 1904; Shear, 1980). Its systematic position was later on emended by Shear (1980), who placed it within its current family, Sironidae. The unique plumose adenostyle (that gives origin to the specific epithet; see Rambla & Juberthie, 1994: plate I, figs 4–6; de Bivort & Giribet, 2004: fig. 32i), the typical Siro ozophores, anal plate, and anal gland, or the typical Parasiro–Odontosiro anal region (with sternites 8 and 9 fused, but not fused with tergite IX; see de Bivort & Giribet, 2004: fig. 38i), make an original combination of characters that legitimately deserve generic status. Although Paramiopsalis and Odontosiro overlap in their areas of distribution, they are clearly different morphologically. New collections: Ponte San Miguel, Parque Nacional da Peneda-Gerês, Serra do Gerês (Braga Province, Região Norte, Portugal), Ponte do Rio Omen, Parque Nacional da Peneda-Gerês, Serra do Gerês (Braga Province, Região Norte, Portugal), Bouza de Mo, Parque Nacional da Peneda-Gerês, Serra do Gerês (Braga Province, Região Norte, Portugal), near Celeiro (Braga Province, Região Norte, Portugal), Garfe, Póvoa de Lanhoso (Braga Province, Região Norte, Portugal). New Paramiopsalis species: Recent collections from Fragas do Eume, A Coruña (Galicia), by E. Mateos in April and November 2006 yielded seven male, five female, and three juvenile specimens of a new species of Paramiopsalis that we describe here, in his honour. Fragas do Eume is a unique ecosystem in Europe.3 Bordering the river of the same name (84 km long), the trees (black poplars, alders, and oaks) are the main elements of an ecological system (Atlantic Forest) that is very characteristic, thanks to the proximity of the sea and the deep riverbanks, which led to the creation of a nature reserve in 1997. 3 Information about Fragas do Eume comes from a website to promote tourism in the Park consulted in November 2006: http://www.eumeturismo.org/eng/portada.html 791 According to legend, when God created the three rivers that rise in the Xistral mountain range (Eume, Landro, and Masma), he promised a man every year to the river that reached the sea first. Betrayed by the other two, which left it sleeping, the Eume had to traverse valleys and mountains in order to win. That is why it ended up being rough and wild, and why it takes the life of a man every year, or used to, before the reservoirs were built. There are more than 9000 hectares of different kinds of woodland along the banks of five municipalities. Nearest to the river grow riverbank forests of black poplars and alders, with ferns and mosses, characteristic of the park, and also two rare species of daffodils. Oak forests appear further up the mountainous slopes. Although the flora is the best appreciated biota of Fragas, it also hosts some endemic and endangered animal species, including small amphibians, reptiles, numerous birds of prey, and large mammal species, such as the wolf. PARAMIOPSALIS EDUARDOI SP. NOV. (FIGS 3–8) Type material: Male holotype (Museum of Comparative Zoology, Harvard University, MCZ, ex MCZ DNA101878; Fig. 3) from Fragas do Eume, A Coruña Province (Galicia, Spain), collected 12 April 2006 by E. Mateos. One male paratype (MCZ DNA101878; two legs used for DNA extraction), same collecting data as the holotype. One male, in SEM stubs, and one female (Fig. 4) paratypes (MCZ, ex MCZ DNA101878), same collecting data as the holotype. Four male and four female paratypes (MCZ DNA102080) from Fragas do Eume, A Coruña Province (Galicia, Spain), collected 10 November 2006 by E. Mateos. Additional material: Three juveniles (MCZ DNA102080; one specimen used for DNA extraction) from Fragas do Eume, A Coruña Province (Galicia, Spain), collected 10 November 2006 by E. Mateos. Diagnosis: As for the genus. Adenostyle lamelliform, as opposed to the plumose type found in Paramiopsalis ramulosus. Anal plate with a longitudinal ridge, thinner than that of Paramiopsalis ramulosus. Description: Total length of male holotype (in mm), 1.40; largest body width in prosoma behind ozophores, 0.72; width across ozophores, 0.67; body length/width ratio, 1.94. Body orange-brown when preserved in 96% ethanol. Anterior margin of dorsal scutum straight without lateral projections; prosomal region trapezoidal (Figs 3A, 4A). Eyes absent (Figs 3C, 4C). Ozophores conical (slightly round; Figs 3A, 4A, 5B), of type II (facing laterally slightly above edge of carapace; Figs 3C, 4C), with subtermi- © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 792 J. MURIENNE and G. GIRIBET nal ozopore (‘plugged’, as in de Bivort & Giribet, 2004); ornamentation uniform and non-directional (Fig. 5B). Transverse prosomal sulcus inconspicuous; transverse opisthosomal sulci inconspicuous (Figs 3A, 4A). Dorsal scutum convex; maximum width in prosomal area, behind ozophores (Figs 3A, 4A). Opisthosomal part of dorsal shield wider than ventral side (Figs 3B, 4B). Ventral prosomal complex of males with coxae I, II, and IV meeting in the midline, the latter for a distance longer than the gonostome length; coxae III not meeting in the midline (Fig. 5A, C). Coxae I, II, and IV with broad endites; coxal pore between coxae III and IV not observed (Fig. 5A, C). Coxae II and III with small processes running along their sutures; coxae III and IV with conspicuous processes running along their sutures (Fig. 5A, C). Small projections of coxae IV endite present in the anterior portion of the gonostome wall (Fig. 5C). Coxa I free, coxa II fused to coxae III and IV. Sternum absent (Fig. 5C). Male gonostome pentagonal, almost triangular, wider than long (99 ¥ 69 mm), with an almost straight (slightly concave) posterior margin, and delimited laterally and anterolaterally by the elevated endites of coxa IV (Fig. 5A, C). Spiracles oval in shape, closed, with a maximum diameter of 51 mm (Fig. 5E). Ventral opisthosomal region without conspicuous modifications or gland openings (Fig. 5A). Opisthosomal tergite IX free, and sternites 8 and 9 medially fused for most of their length, not forming a corona analis (Fig. 5A, D). Anal plate slightly oval (180 ¥ 144 mm), with a thin medial ridge; ridge with conspicuous setae (Fig. 5D). Anal glands not observed with SEM because of the putative secretion accumulated on the dorsal part of tergite VIII. Cuticle ornamented (with a tuberculatemicrogranular surface; Murphree, 1988) in all ventral areas, except on the spiracle and coxal endites; anal plate without tuberculate-microgranular ornamentation, but with a honeycomb pattern (Fig. 5A, C, D). A A B B C C Figure 3. Paramiopsalis eduardoi sp. nov., holotype male. A, dorsal view. B, ventral view. C, lateral view. Scale bars: 0.5 mm. Figure 4. Paramiopsalis eduardoi sp. nov., paratype female. A, dorsal view. B, ventral view. C, lateral view. Scale bars: 0.5 mm. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 CYPHOPHTHALMI IN THE IBERIAN HOT SPOT 793 A B D C E Figure 5. Paramiopsalis eduardoi sp. nov., scanning electron microgarphs of a male paratype. A, ventral view of whole body. B, ozophore. C, prosomal ventral complex. D, anal region. E, spiracle. Chelicerae (Fig. 6A, B) relatively short and robust; basal article 362-mm long, 157-mm wide, without conspicuous ventral processes, and without a dorsal crest; second article 379-mm long, 123-mm wide; movable finger 182-mm long; widest part of cheliceral distal article near articulation with mobile digit; all articles with few setae; proximal article almost entirely granulated. Second cheliceral segment only © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 794 J. MURIENNE and G. GIRIBET Table 2. Leg measurements (in mm) given as length/width and total length Leg Trochanter Femur Patella Tibia Metatarsus Tarsus Total I II III IV 101/115 103/103 114/99 174/105 422/126 304/113 293/119 357/115 181/112 153/124 165/113 166/120 249/116 231/123 203/120 224/132 145/92 130/91 101/83 108/96 383/130 370/126 323/105 372/120 1481 1291 1199 1401 A C B D Figure 6. Paramiopsalis eduardoi sp. nov., scanning electron microgarphs of a male paratype. A, right chelicera. B, cheliceral fingers. C, left pedipalp. D, pedipalpal claw. partly and slightly ornamented. Cheliceral denticles of the uniform type (Fig. 6B). Palp 1.026-mm long, smooth, slightly covered with scale-like processes on all articles (Fig. 6C). Measurements of palpal articles, length/width (L/W ratio) in mm: trochanter 123/65 (1.89), femur 284/70 (4.06), patella 173/67 (2.58), tibia 225/63 (3.57), tarsus 221/57 (3.88); claw 30-mm long (Fig. 6D). Palp trochanter with a conspicuous ventral process. Ornamentation present in trochanter; absent on second palp article. Legs relatively long and robust; see measurements in Table 2. Leg I longer than leg II. Solea in tarsus I absent (Fig. 7A). Tarsus and metatarsus smooth in legs I (Fig. 7A) and II (Fig. 7C); metatarsus almost completely ornamented in leg III (Fig. 7E), and entirely ornamented in leg IV (Fig. 7G); all other articles ornamented on legs I–IV. Tarsus IV of male entire (Fig. 7G); with a broad lamelliform adenostyle (102/93 mm), not plumose, subcylindrical at the base, with a lateral pore; distal margin at 44% of the tarsal length (not in the most basal region of the tarsus; Fig. 7G, H). Claws hooked, smooth, and without dentition or lateral pegs (Fig. 7B, D, F, I). Spermatopositor (Fig. 8) small (180-mm long), with 3/3 dorsal long bifurcating microtrichia with enlarged bases, and shorter ventral microtrichia without enlarged bases. Pars apicalis with hooked mobile digits. Ventral part with four pairs of shorter microtrichia; ventral plate clearly surpasses the pars distalis, only visible from the dorsal side. Ovipositor not studied. Etymology: The species is named after our colleague Eduardo Mateos from the Departament de Biologia Animal, Universitat de Barcelona, who collected the specimens of the new species. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 CYPHOPHTHALMI IN THE IBERIAN HOT SPOT 795 B A C D E G F H I Figure 7. Paramiopsalis eduardoi sp. nov., scanning electron microgarphs of the legs of a male paratype. A, metatarsus and tarsus I. B, tarsal claw I. C, metatarsus and tarsus II. D, tarsal claw II. E, metatarsus and tarsus III. F, tarsal claw III. G, metatarsus and tarsus IV. H, detail of the adenostyle. I, tarsal claw IV. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 796 J. MURIENNE and G. GIRIBET Figure 8. Paramiopsalis eduardoi sp. nov., confocal laser scanning micrograph of the spermatopositor of a male paratype, dorsal view. Total length is 180 mm. Phylogentics: Our molecular phylogenetic analysis resulted in a well-resolved and stable phylogeny. We show the single most parsimonious tree of 2914 steps obtained under equal weighting (Fig. 9), and represent the nodal stability using sensitivity plots. Except for Suzukielus sauteri (Roewer, 1916), which appears as sister to the genus Siro under alternative parameter sets, all nodes appear highly stable. The two specimens of Paramiopsalis eduardoi sp. nov. form a clade (100% jackknife proportion), and group with Paramiopsalis ramulosus (100% bootstrap). The genus Paramiopsalis appears as sister to the genus Cyphophthalmus with strong support (93% jackknife proportion), and under all of the parameter sets examined. DISCUSSION PHYLOGENETICS The different Iberian species of Cyphophthalmi have been included in several phylogenetic analyses, both using morphological (Giribet & Boyer, 2002; Giribet, 2003b; de Bivort & Giribet, 2004) and molecular (Giribet & Boyer, 2002; Boyer et al., 2005, 2007b) data. The first morphological analysis included Parasiro coiffaiti and Paramiopsalis ramulosus, along with representatives of most other cyphophthalmid genera (Giribet & Boyer, 2002), and placed them in two independent lineages. A subsequent morphological analysis including sironid species from all genera placed O. lusitanicus as sister to the genus Parasiro, whereas Iberosiro was placed as sister to Paramiopsalis. These two clades were not sisters to each other. Molecular data are available for only two of the four Iberian genera: Paramiopsalis and Parasiro. Whereas most analyses place Paramiopsalis with other sironids of the genera Siro and Cyphophthalmus (Giribet & Boyer, 2002; Boyer et al., 2005, 2007b; Schwendinger & Giribet, 2005), Parasiro tends to branch more basally, or even outside Sironidae (Boyer et al., 2007b). In our analysis, using only one nonsironid outgroup, Metasiro americanus (Davis, 1933), Parasiro branches out before the core sironid clade and its sister genus Suzukielus, which is also often found not to form a clade with the other sironids (Boyer et al., 2007b) (Fig. 9). Although the results from those analyses have increased the amounts of taxa and data, we are still far from having a comprehensive picture of the phylogeny of the family Sironidae. The resolution from morphological data is somewhat limited within Cyphophthalmi because of the low degree of morphological variation of the group (e.g. Giribet & Boyer, 2002; Giribet, 2003b; de Bivort & Giribet, 2004; Boyer & Giribet, 2007), and therefore molecular data have proven essential for reconstructing the phylogeny of the group (e.g. Boyer et al., 2005, 2007b; Schwendinger & Giribet, 2005; Boyer & Giribet, 2007; Clouse & Giribet, 2007). It is therefore imperative to add molecular data from Iberosiro and Odontosiro. The new data strongly suggest that Paramiopsalis eduardoi sp. nov. is sister to Paramiopsalis ramulosus, as expected by morphology, suggesting that the plumose adenostyle of Paramiopsalis ramulosus is apomorphic for the type species and not for the genus. All other relevant characters for distinguishing the genus from other sironid genera (e.g. ozophore position, fusion of coxae, leg ornamentation, and anal region) are identical for both species. At the molecular level, the two species differ in one nucleotide in the complete 18S rRNA (out of 1800 bp), a number identical to that found between two cryptic species of centipedes of the genus Craterostigmus in New Zealand and Tasmania (Edgecombe & Giribet, 2008). The average p-distances for COI within Paramiopsalis eduardoi sp. nov. (N = 2) and within Paramiopsalis © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 CYPHOPHTHALMI IN THE IBERIAN HOT SPOT 797 DNA101532 Metasiro americanus 100 DNA101877 Parasiro coiffaiti DNA101383 Parasiro coiffaiti DNA101543 Suzukielus sauteri 100 74 DNA100489 Siro exilis 56 89 DNA101611 Siro kamiakensis DNA100488 Siro acaroides 63 95 DNA100461 Siro valleorum DNA100457 Siro rubens 41 DNA100459 Paramiopsalis ramulosus 100 100 DNA102080 Paramiopsalis eduardoi sp. nov. DNA101878 Paramiopsalis eduardoi sp. nov. 93 DNA100499 Cyphophthalmus ere 99 111 121 211 3221 DNA100487 Cyphophthalmus duricorius 90 55 DNA100494 Cyphophthalmus martensi DNA100493 Cyphophthalmus minutus Figure 9. Phylogeny of selected members of the family Sironidae, based on the combined analysis of 18S, 28S, cytochrome c oxidase subunit I (COI), and 16S under direct optimization and equal weighting. The support values on branches indicate the jackknife frequencies. Each weighting scheme is assigned a code corresponding to the ratio of indel/transversion, transversion/transition, and transition values. Tree lengths for the different parameter sets are as follows: 111, 2914; 121, 4585; 211, 3228; 3221, 6168. Black squares indicate monophyly; grey squares indicate that either the group is paraphyletic or the internal relationships are different. ramulosus (N = 4) are 0.000 (±0.000 SE) and 0.049 (±0.006 SE), respectively, whereas average p-distance between the two species is 0.145 (±0.013 SE). For pairs of Paramiopsalis ramulosus, the p-distances range between 0.014 and 0.076. This level of withinspecies genetic divergence in COI is much lower than the average genetic divergences for the pettalid species Aoraki denticulata (Forster, 1948) reported by Boyer, Baker & Giribet. (2007a). Paramiopsalis ramulosus was originally described from the Aveiro Province in Região Norte of Portugal, and had been cited from Galicia and León, in northwestern Spain. Recent collections in several localities across north-western Portugal, in the Braga Province, by G. Giribet shows that the River Miño/Minho has not acted as a barrier for this species. Although some of the citations for Galicia and León could belong to cryptic species, we have not been able to examine these specimens (indicated as Paramiopsalis sp. in Fig. 1). It is clear that the specimens from southern Galicia and northern Portugal belong to the same morphospecies, and form a clade (G. Giribet, unpubl. data), although they exhibit p-distances of up to 0.076 for COI. As suggested by previous phylogenetic analyses, the genus Paramiopsalis is sister to Cyphophthalmus, distributed in the eastern part of Southern Europe and Turkey, instead of being sister to the Western Europe/North American genus Siro. This relationship is supported in 93% of the jackknife replicates, and is recovered with all of the analytical parameters examined. As seen in previous analyses, our data strongly suggest that the genus Parasiro represents yet another lineage of sironids, not directly related to the Siro clade or to the Cyphophthalmus/Paramiopsalis group. PHYSICAL SETTING Cyphophthalmi are found in most land masses that have suitable habitat, generally in temperate to tropical rain forests. Temperate rain forests are most common in the north-western and northern Iberian Peninsula, where the annual rainfall is greater than 1000 mm (Ninyerola, Pons & Roure, 2005). However, cyphophthalmid populations are not distributed evenly along the northern edge of the Iberian Peninsula. Instead, there is a bimodal distribution: with © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 156, 785–800 798 J. MURIENNE and G. GIRIBET Parasiro found exclusively in the easternmost Pyrenees and the Catalonian Coastal Ranges, and with Paramiopsalis and Odontosiro concentrated on the north-western Iberian Peninsula (northern Portugal, Galicia and León). However, another important requirement of Cyphophthalmi is the age of the land mass where they reside (or its immediate adjacency), as they are extremely poor dispersers (Boyer et al., 2007a). Not surprisingly, the two areas where cyphophthalmids are found correspond to regions with Variscan granitoid rocks and Paleozoic (and Precambrian) rocks of the Iberian Massif of Galicia/ northern Portugal, and in the Variscan granitoid rocks and Paleozoic inliers of the Eastern Pyrenees and the Catalonian Coastal Ranges (CCR) (Gibbons & Moreno, 2002). As Iberosiro distylos has only been found in one cave in Montejunto, near Lisbon, rainfall does not seem to be determinant. Given the geology and rainfall, one could expect Cyphophthalmi in the Pyrenees, directly north of Pamplona, or in the Internal Betics (see Gibbons & Moreno, 2002), two areas for which no species has been reported so far. ACKNOWLEDGEMENTS We are indebted to Eduardo Mateos for providing the specimens for the description of the new species and to Carlos Prieto for providing specimens of a new Iberosiro from Asturias. Dave Smith assisted with the CLSM, and the Center for Nanoscale Systems (CNS) at Harvard provided SEM support. Ligia Benavides kindly generated the Automontage photographs. Arturo Muñoz-Cuevas (Paris) kindly lent the type specimens of Parasiro coiffaiti and Iberosiro distylos. M. A. Arnedo helped with the evolutionary analyses in MEGA. M. A. Arnedo and an anonymous reviewer provided comments that helped to improve this manuscript. This material is based upon work supported by the National Science Foundation under Grant no. 0236871. GG was supported in part by a sabbatical grant to the Centre d’Estudis Avançats de Blanes, CSIC, from the Ministerio de Educación y Ciencia (Spain). 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