Cambarus eeseeohensis
Thoma, 2005
Grandfather Mountain Crayfish
G3VulnerableGlobal Rank
VulnerableIUCN
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.791631
Element CodeICMAL07A20
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
IUCNVulnerable
Endemicendemic to a single state or province
KingdomAnimalia
PhylumArthropoda
ClassMalacostraca
OrderDecapoda
FamilyCambaridae
GenusCambarus
Other Common NamesLinville River Crayfish (EN)
Concept ReferenceThoma, R.G. 2005. Cambarus (Cambarus) eeseeohensis (Decapoda: Cambaridae), a new species of crayfish from the Linville River of North Carolina and its bearing on understanding the evolution of the subgenus Cambarus. Poceedings of the Biological Society of Washington 118(4): 794-802.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-03-01
Change Date2024-03-01
Edition Date2024-03-01
Edition AuthorsCordeiro, J. (2010); rev T. Cornelisse (2024)
Threat ImpactMedium
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences21 - 80
Rank ReasonsThis species has a restricted range and a moderate number of occurrences and despite several potential threats, populations appear stable.
Range Extent CommentsThis species occurs in the Linville and Watauga Rivers in western North Carolina, USA (Ewing et al. 2016).
Occurrences CommentsThis species is known from approximately 25 occurrences using a 2 km separation distance and records from 2005-2024 (Ewing et al. 2016; InvertEBase 2024; SCAN 2024; GBIF 2024).
Threat Impact CommentsThis species is somewhat threatened by introductions of non-native and native crayfish, habitat and population fragmentation, and is likely to be impacted by changes in temperatures, precipitation, and storms due to its limited range and relatively segregated populations (Thoma 2005; Ewing et al. 2016).
Ecology & Habitat
Description
complete description in Thoma (2005)
Diagnostic Characteristics
Displays typical chelae characteristics of the subgenus Cambarus and belongs to the group of species in the subgenus having thickened, concave, rostral margins (C. sciotensis, C. angularus, C. carinirostris, in part). All other members of the subgenus lack such rostral characters. Cambarus sciotensis (New River basin), and Cambarus angularus lack strong development on the chelae of a lateral impression at the base of the propodus, dorsal ridges on the fingers, and enlarged tubercle development on the opposable margins of the propodus and dactyl. Populations of C. sciotensis associated with the Scioto (Ohio), Big Sandy (Kentucky and West Virginia), and Elk (West Virginia) river basins can display an enlarged tubercle on the opposable propodus and a slight lateral impression on the lateral chelae, but can be distinguished from Cambarus eeseeohensis by the presence of an upturned tubercle at the anterior end of the postorbital ridge (character state also found in New River populations). In some portions of its range, C. carinirostris can be similar to C. eeseeohensis in their rostral and chelae characters but in all instances C. eeseeohensis can be distinguished by a slightly narrower areola width, and width of gape between the chelae fingers, and a partial second row of mesial palmer tubercles (Thoma, 2005).
Habitat
This species occurs under rocks in riffle areas of small rivers (Thoma 2005).
Reproduction
Gravid females have been collected in August (Thoma 2005).
Other Nations (1)
United StatesN3
| Province | Rank | Native |
|---|
| North Carolina | S2 | Yes |
References (11)
- Cooper, J.E. 2010. Annotated checklist of the crayfishes of North Carolina, and correlations of distributions with hydrologic units and physiographic provinces. Journal of the North Carolina Academy of Science 126(3):69-76.
- Cooper, J. E., and W. T. Russ. 2013. Four crayfishes (Decapoda: Cambaridae) new to the North Carolina fauna, with notes on other species in the state. Journal of North Carolina Academy of Science 129(2):53-57.
- Crandall, K. A., and S. De Grave. 2017. An updated classification of the freshwater crayfishes (Decapoda: Astacidea) of the world, with a complete species list. Journal of Crustacean Biology 37(5):615-653.
- Ewing, T.D., Thoma, R.F., Fraley, S.J., Russ, W.T., and J. Pope. 2016. Distribution and conservation status of the Grandfather Mountain crayfish. Journal of the Southeastern Association of Fish and Wildlife Agencies 3: 64-70.
- Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
- InvertEBase. 2024. Online. Available: https://invertebase.org/portal/index.php.
- Simmons, J.W. and S.J. Fraley. 2010. Distribution, status, and life-history observations of crayfishes in western North Carolina. Southeastern Naturalist 9 (special issue 3):79-126.
- Symbiota Collections of Arthropods Network (SCAN). 2024. A data portal built to visualize, manipulate, and export species occurrences. Online: http://scan-bugs.org/portal/index.php. Accessed 2024
- Taylor, C. A., G. A. Schuster, J. E. Cooper, R. J. DiStefano, A. G. Eversole, P. Hamr, H. H. Hobbs III, H. W. Robison, C. E. Skelton, and R. F. Thoma. 2007. A reassessment of the conservation status of crayfishes of the United States and Canada after 10+ years of increased awareness. Fisheries 32(8):371-389.
- Thoma, R.G. 2005. <i>Cambarus </i>(<i>Cambarus</i>) <i>eeseeohensis </i>(Decapoda: Cambaridae), a new species of crayfish from the Linville River of North Carolina and its bearing on understanding the evolution of the subgenus Cambarus. Poceedings of the Biological Society of Washington 118(4): 794-802.
- Voshell, J.R. 2002. A guide to common freshwater invertebrates of North America. McDonald and Woodward Publishing Company, Granville, Ohio, USA: 442 pp.