| 词条 | Caecidotea nickajackensis |
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| status = EX | status_system = IUCN2.3 | status_ref = [1] | regnum = Animalia | phylum = Arthropoda | subphylum = Crustacea | classis = Malacostraca | ordo = Isopoda | familia = Asellidae | genus = Caecidotea | species = C. nickajackensis | binomial = Caecidotea nickajackensis | binomial_authority = Packard, 1881 }} Caecidotea nickajackensis is an extinct species of isopod crustacean in the family Asellidae. It was endemic to a single cave in Tennessee, and was thought to have been exterminated when that cave was flooded in 1967 by the building of the Nickajack Dam. DistributionCaecidotea nickajackensis was only known to have occurred in Nickajack Cave, Tennessee, before the building of the Nickajack Dam by the Tennessee Valley Authority in 1967.[1] Two other obligate stygobionts were exterminated in the same action – the pseudoscorpion Microcreagris nickajackensis and the ground beetle Pseudanophthalmus nickajackensis.[1]ConservationC. nickajackensis was listed as a vulnerable species on the IUCN Red List,[2] and as a "species of concern" under the Endangered Species Act.[3] It was extirpated from Nickajack Cave in 1967, and was now thought to be extinct.[1]TaxonomyCaecidotea nickajackensis was first described by Alpheus Spring Packard, in an 1881 publication by Edward Drinker Cope and himself, titled The Fauna of Nickajack Cave.[1][4] A second species, C. richardsonae, was described from the same cave by William Perry Hay in 1901, and was thought to be a junior synonym of C. nickajackensis for a long time.[1] It was now recognised as a separate species distributed from Alabama to Virginia.[1]References1. ^1 2 3 4 5 {{cite journal |author=Julian J. Lewis |year=2009 |title=On the identity of Caecidotea nickajackensis (Crustacea: Isopoda: Asellidae) |journal=Proceedings of the Biological Society of Washington |volume=122 |issue=2 |pages=215–224 |doi=10.2988/08-47.1}} {{Taxonbar|from=Q308284}}2. ^1 {{Cite journal | author = Inland Water Crustacean Specialist Group | title = Caecidotea nickajackensis | journal = The IUCN Red List of Threatened Species | volume = 1996 | page = e.T3448A9865322 | publisher = IUCN | date = 1996 | url = http://www.iucnredlist.org/details/3448/0 | doi = 10.2305/IUCN.UK.1996.RLTS.T3448A9865322.en | access-date = 6 January 2018}} 3. ^{{FWS profile |spcode=K02D |name=Nickajack Cave isopod |sci=Caecidotea nickajackensis |date=March 28, 2011}} 4. ^{{cite journal |author=E. D. Cope |author-link=Edward Drinker Cope |author2=A. S. Packard Jr. |author2-link=Alpheus Spring Packard |last-author-amp=yes |year=1881 |title=The fauna of the Nickajack Cave |journal=The American Naturalist |volume=15 |issue=11 |pages=877–882 |jstor=2448794 |doi=10.1086/272948}} 10 : Asellota|Freshwater crustaceans of North America|Fauna of the Southeastern United States|Endemic fauna of the United States|Marion County, Tennessee|Crustaceans described in 1881|Extinct invertebrates since 1500|Extinct crustaceans|Taxa named by Alpheus Spring Packard|Taxonomy articles created by Polbot |
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