Cambarus gentryi

Cambarus gentryi, the linear cobalt crayfish,[2] is a small burrowing species of crayfish in the family Cambaridae, notable for its blue carapace.[3] It is endemic to Tennessee in the United States.[1][2]

Cambarus gentryi

Apparently Secure  (NatureServe)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Family: Cambaridae
Genus: Cambarus
Species:
C. gentryi
Binomial name
Cambarus gentryi
Hobbs, 1970

Geographic range

The linear cobalt crayfish has been found in the Cumberland and Duck river basins in Tennessee.[3]There are 37 reported sightings of C. gentryi on the Global Biodiversity Information Facility (GBIF) between 1962-2022.[4] They are all localized to the southern part of Tenessee in the USA, North America.[4]

Physical description

Cambarus gentryi has a shell length of around 3–5 cm (1.2–2.0 in) and pincers about 2 cm (0.79 in) long.[3] Its shell is cobalt blue in colour with orange or yellow to yellowish-green markings.[3] Like other decapods, C. gentryi has ten pairs of legs; the forward-most pair are modified into robust claws.[5]

Habitat

The linear cobalt crayfish inhabits damp areas along river banks. It forms complex burrows in damp soil, which often have two openings to the surface and have been found up to about 0.91 m (3 ft) in depth.[3][6]

Development and reproduction

Adults in family Cambaridae alternate molts between reproductive (form I) and non reproductive (Form II) forms.[5] Male form I has larger claws and altered sperm transfer gonopods; in some species, the female form I has a wider abdomen.[5]

Lifespan

The exact lifespan of C. gentryi is not known; however, other individuals in this family (Cambaridae) have been known to live 6-7 years.[5]

Conservation status

Cambarus gentryi is listed as least concern by the IUCN.[1]

Genomic information

Five publicly available gene fragment sequences exist for C. gentryi, availble through NCBI genbank with taxonomy ID NCBI:txid318489.[7] The following gene fragments are available:[7]

  1. Isolate JF2508 cytochrome c oxidase subunit I (COI) gene; Accession no. KX417101.1
  2. Histone H3 (H3) gene, partial cds; Accession no. DQ411804.1
  3. Cytochrome oxidase subunit I (CO1) gene, partial cds; mitochondrial; Accession no. DQ411785.1
  4. 12S ribosomal RNA gene, partial sequence; mitochondrial; Accession no. DQ411731.1
  5. 16S ribosomal RNA gene, partial sequence; mitochondrial; Accession no. AY853664.1

References
  1. Cordeiro, J.; Jones, T. & Thoma, R.F. (2010). "Cambarus gentryi". IUCN Red List of Threatened Species. 2010: e.T153803A4547037. doi:10.2305/IUCN.UK.2010-3.RLTS.T153803A4547037.en.
  2. "Cambarus gentryi". NatureServe Explorer An online encyclopedia of life. 7.1. NatureServe. Retrieved 1 March 2023.
  3. Biological Society of Washington; Washington, Biological Society of; Washington, Biological Society of; Washington, Biological Society of; Institution, Smithsonian; Institution, Smithsonian (1970). Proceedings of the Biological Society of Washington. Vol. 83. Washington: Biological Society of Washington.
  4. "Search". www.gbif.org. Retrieved 2023-10-02.
  5. Thorp, James H.; Rogers, D. Christopher (2011), "Crayfish, Crabs, and Shrimp", Field Guide to Freshwater Invertebrates of North America, Elsevier, pp. 157–168, doi:10.1016/b978-0-12-381426-5.00018-1, ISBN 978-0-12-381426-5, retrieved 2023-10-02
  6. Hobbs, Horton Holcombe Jr. (1989). "An Illustrated Checklist of the American Crayfishes (Decapoda, Astacidae, Cambaridae, Parastacidae)". Smithsonian Contributions to Zoology (480): 22. doi:10.5479/si.00810282.480.
  7. "Cambarus Gentryi". NCBI taxonomy browser. Retrieved October 1, 2023.


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