The IUCN Red List of Threatened Species™
ISSN 2307-8235 (online)
IUCN 2008: T134955A4041666
Fredius estevisi
Assessment by: Cumberlidge, N.
View on www.iucnredlist.org
Citation: Cumberlidge, N. 2008. Fredius estevisi. The IUCN Red List of Threatened Species 2008:
e.T134955A4041666. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134955A4041666.en
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THE IUCN RED LIST OF THREATENED SPECIES™
Taxonomy
Kingdom
Phylum
Class
Order
Family
Animalia
Arthropoda
Malacostraca
Decapoda
Pseudothelphusidae
Taxon Name: Fredius estevisi (Rodriguez, 1966)
Taxonomic Notes:
Subfamily Pseudothelphusinae; tribe Kingsleyini.
There are two subspecies included in this sepcies: Fredius adpressus adpressus Rodriguez and Pereira,
1992; and Fredius adpressus piaroensis Rodriguez and Pereira, 1992.
Assessment Information
Red List Category & Criteria:
Least Concern ver 3.1
Year Published:
2008
Date Assessed:
January 1, 2008
Justification:
Listed as Least Concern in view of its wide distribution, presumed large population, and because it is
unlikely to be declining fast enough to qualify for listing in a more threatened category and there are no
known long-term threats.
Geographic Range
Range Description:
Venezuela: Bolivar State. Tributaries of the upper Caroni River (a tributary of the Orinoco River) which
drain the Gran Sabana plateau a highland savanna drained by the headwaters of the Caroni River and
and the southern slopes of Mount Roraima. Bolivar State. Brazil: Rio Uraricoera, state of Roraima [C.
Magalhaes, unpublished data]. The subspecies F. e. siapiensis is found in the Siapa river, Amazonas
State. The Siapa River is a small river that flows near the Orinoco River in Venezuela, 518 m, but drains
into the Amazon through Brazo Casiquiare and the Rio Negro; also from the Cunucunuma River, an
affluent of the Orinoco with its headwaters in the Cerro Duida.
Country Occurrence:
Native: Brazil (Amazonas); Venezuela, Bolivarian Republic of (Venezuela (mainland))
© The IUCN Red List of Threatened Species: Fredius estevisi – published in 2008.
http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134955A4041666.en
1
Distribution Map
© The IUCN Red List of Threatened Species: Fredius estevisi – published in 2008.
http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134955A4041666.en
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Population
This is a widespread and abundant species found in the major river systems of more than one country.
Current Population Trend: Stable
Habitat and Ecology (see Appendix for additional information)
This species is found in the Guyana Shield in Venezuela and Brazil in the Orinoco and Amazon river
basins. The Guyana Shield encompasses a large region of northern South America, broadly ranging from
eastern Colombia to the west, to the Caribbean Sea and the Atlantic Ocean to the north and east, and to
the Rio Negro and Rio Amazonas to the south. This species is also found in the Rio Negro river basin
draining the Guyana Shield which is a tributary of the Amazon river.
Systems: Freshwater
Conservation Actions (see Appendix for additional information)
This species is found in a protected area (Serra do Tumucumaque).
Credits
Assessor(s):
Cumberlidge, N.
Reviewer(s):
Magalhaes, C. and McIvor, A.
© The IUCN Red List of Threatened Species: Fredius estevisi – published in 2008.
http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134955A4041666.en
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Bibliography
Rodríguez, G. 1982. Les crabes d'eau douce d'Amerique - famille des Pseudothelphusidae. ORSTOM,
Paris.
Rodríguez, G. & Campos, M.R. 1998. A cladistic revision of the genus Fredius (Crustacea: Decapoda:
Pseudothelphusidae) and its significance to the biogeography of the Guianan lowlands of South
America. Journal of Natural History 32: 673 – 775.
Citation
Cumberlidge, N. 2008. Fredius estevisi. The IUCN Red List of Threatened Species 2008:
e.T134955A4041666. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134955A4041666.en
Disclaimer
To make use of this information, please check the Terms of Use.
External Resources
For Images and External Links to Additional Information, please see the Red List website.
© The IUCN Red List of Threatened Species: Fredius estevisi – published in 2008.
http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134955A4041666.en
4
Appendix
Habitats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Habitat
Season
Suitability
Major
Importance?
5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent
Rivers/Streams/Creeks (includes waterfalls)
-
Suitable
Yes
Conservation Actions in Place
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Conservation Actions in Place
In-Place Land/Water Protection and Management
Occur in at least one PA: Yes
Research Needed
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Research Needed
1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
Additional Data Fields
Distribution
Number of Locations: 10
Lower elevation limit (m): 518
Upper elevation limit (m): 1250
Population
Population severely fragmented: No
© The IUCN Red List of Threatened Species: Fredius estevisi – published in 2008.
http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134955A4041666.en
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The IUCN Red List Partnership
The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species
Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN
Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation
International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas
A&M University; Wildscreen; and Zoological Society of London.
THE IUCN RED LIST OF THREATENED SPECIES™