Cambarus tenebrosus (Crayfishes and Shrimp of the Green River, KY)

Cambarus tenebrosus

Diagnostic description ⁴

Hooks on male 3rd pereiopods only; chela with at least two rows of tuberlces alsong mesial margin of plam, mesialmost of 8; moderately wide areola; male 1st pleopod as described above.

Distribution ⁵

Global Range: (20,000-200,000 square km (about 8000-80,000 square miles)) Streams of the karst area east of the Mississippi River (Tennessee River drainages in northern Alabama north to Vermilion River drainage, a Wabash River tributary, in east-central Illinois, west to the Cache River drainage in extreme southwestern Illinois, and east to the Licking River drainage in northeastern Kentucky) from Alabama to Indiana and Illinois (Hobbs, 1989; Taylor, 1997); also found in caves.

Habitat and ecology ⁶

Habitat and Ecology

This species occurs in both subterranean environments and surface streams (Taylor et al. 2007, NatureServe 2009). Its occupation of subterranean environments is not recent, and is usually found under rocks with shallow excavations (Taylor et al. 2007, NatureServe 2009). On permanent surface streams, it prefers mud substrates (Taylor et al. 2007, NatureServe 2009).

Systems

Freshwater

Iucn red list assessment ⁷

Red List Category

Least Concern

Red List Criteria

Version

3.1

Year Assessed

2010

Assessor/s

Cordeiro, J., Jones, T. & Thoma, R.F.

Reviewer/s

Collen, B. & Richman, N.

Contributor/s

Livingston, F., Livingston, F., Soulsby, A.-M., Batchelor, A., Dyer, E., Whitton, F., Milligan, H.T., Smith, J., Lutz, M.L., De Silva, R., McGuinness, S., Kasthala, G., Jopling, B., Sullivan, K. & Cryer, G.

Justification

Cambarus tenebrosus has been assessed as Least Concern (LC). This species is located across five US States and has been recorded in 104 known sites in the Cumberland Plateau. The estimated EOO is greater than 254,000 km². There are no known major threats for this species and population numbers are believed to be stable.

Nature serve conservation status ⁸

Rounded Global Status Rank: G5 - Secure

Reasons: This species is located across five US States and has been recorded in 104 known sites in the Cumberland Plateau with a population of 233 individuals. The population abundance and site locality is unknown for the other areas of its range but it thought to be extensive. Due to this species ability to inhabit both subterranean and surface environments, C. tenebrosus this species can be considered a habitat generalist.

Range description ⁹

This species is known from Alabama, Indiana, Kentucky, Ohio and Tennessee, USA (Finlay et al. 2006). This species has an unusually large distribution encompassing the interior lowlands and Cumberland Plateau (Finlay et al. 2006). This species is the most widespread crayfish species in Kentucky and is only found in unglaciated sections of Ohio (Finaly et al. 2006). In 2006, 233 individuals were recorded from 84 caves and 20 surface locations in the Cumberland Plateau (Finlay et al. 2006).

Sources and Credits

(c) Andrew Hoffman, some rights reserved (CC BY-NC-ND), https://www.flickr.com/photos/71701055@N00/8514056459/
(c) Andrew Hoffman, some rights reserved (CC BY-NC-ND), https://www.flickr.com/photos/71701055@N00/8621125608/
(c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/28894536
(c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/28894531
(c) International Union for Conservation of Nature and Natural Resources, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/34353265
(c) International Union for Conservation of Nature and Natural Resources, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/34353262
(c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/28894524
(c) International Union for Conservation of Nature and Natural Resources, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/34353263

More Info

Range Map

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