{{Short description|Species of bivalve}} {{Speciesbox | image = Naturalis Biodiversity Center - ZMA.MOLL.419143 - Fusconaia cuneolus (Lea, 1840) - Unionidae - Mollusc shell.jpeg | status = EN | status_system = IUCN3.1 | status_ref = <ref name="iucn status 16 November 2021">{{cite iucn |author=Cummings, K. |author2=Cordeiro, J. |date=2012 |title=''Fusconaia cuneolus'' |volume=2012 |article-number=e.T8773A3146130 |doi=10.2305/IUCN.UK.2012-1.RLTS.T8773A3146130.en |access-date=16 November 2021}}</ref> | status2 = CITES_A1 | status2_system = CITES | status2_ref = <ref>{{Cite web|title=Appendices {{!}} CITES|url=https://cites.org/eng/app/appendices.php|access-date=2022-01-14|website=cites.org}}</ref> | genus = Fusconaia | species = cuneolus | authority = ([[Isaac Lea|Lea]], 1840) | synonyms = *''Unio cuneolus'' <small>Lea, 1840</small> *''Unio appressus'' <small>Lea, 1871</small> *''Unio tuscumbiensis'' <small>Lea, 1871</small> *''Unio flavidus'' <small>Lea, 1872</small> | synonyms_ref=<ref>{{ITIS|taxon=''Fusconaia cuneolus'' (Lea, 1840)|id=80045|access-date=22 April 2023}}</ref> }}
'''''Fusconaia cuneolus''''', the '''fine-rayed pigtoe pearly mussel''' or '''fine-rayed pigtoe''', is a species of [[bivalve]] in the family [[Unionidae]]. It is native to [[Tennessee]], [[Alabama]], and [[Virginia]] in the United States, in each of which its population has declined severely. It is a federally listed [[endangered species]] of the United States.<ref>{{cite web|url=https://ecos.fws.gov/ecp/species/3038|title=Finerayed pigtoe (''Fusconaia cuneolus'')|website=Environmental Conservation Online System|publisher=U.S. Fish & Wildlife Service|access-date=22 April 2023}}</ref><ref>{{Federal Register|41|24062}}</ref>{{rp|24064}}
Like other freshwater mussels, this species reproduces by releasing its larvae, or [[glochidium|glochidia]], into the water where they make their way into the bodies of fish. There they develop into juvenile mussels. Fish hosts for this mussel include [[Pimephales promelas|fathead minnow]] (''Pimephales promelas''); [[Nocomis micropogon|river chub]] (''Nocomis micropogon''); [[Campostoma anomalum|stoneroller]] (''Campostoma anomalum''); [[Notropis telescopus|telescope shiner]] (''Notropis telescopus''); [[Notropis leuciodus|Tennessee shiner]] (''Notropis leuciodus''); [[Luxilus albeolus|white shiner]] (''Luxilus albeolus''); [[Cyprinella galactura|whitetail shiner]] (''Cyprinella galactura''); and the [[Cottus bairdi|mottled sculpin]] (''Cottus bairdi'').<ref name=tnc>{{cite web|url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.118288/Fusconaia_cuneolus|title=''Fusconaia cuneolus''|website=NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer|publisher=NatureServe|location=Arlington, Virginia|author=NatureServe|access-date=22 April 2023|date=7 April 2023}}</ref>
There is only one large population which is located in the [[Clinch River]].<ref name=tnc/>
This species appears to be most closely related to ''[[Fusconaia cor]]''.<ref>{{cite journal |last1=Campbell |first1=David |last2=Lydeard |first2=Charles |date=2012 |title=Molecular Systematics of ''Fusconaia'' (Bivalvia: Unionidae: Ambleminae) |journal= American Malacological Bulletin |volume=30 |issue=1 |pages=1–17|doi=10.4003/006.030.0101|bibcode=2012AMalB..30....1C |s2cid=84552044 }}</ref>
==References== {{Reflist}}
{{Taxonbar|from=Q307791}}
[[Category:Molluscs of the United States]] [[Category:Fusconaia|cuneolus]] [[Category:Bivalves described in 1840]] [[Category:Taxonomy articles created by Polbot]] [[Category:ESA endangered species]]
{{Unionidae-stub}}