{{Short description|Species of bivalve}} {{Speciesbox | image = Fusconaia subrotunda.jpg | image_caption = | status = VU | 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 subrotunda'' |volume=2012 |article-number=e.T8775A3146358 |doi=10.2305/IUCN.UK.2012.RLTS.T8775A3146358.en |access-date=16 November 2021}}</ref> |status2=LT |status2_system=ESA |status2_ref=<ref name=ecos>{{cite web|url=https://ecos.fws.gov/ecp/species/9880|title=Longsolid (''Fusconaia subrotunda'')|website=Environmental Conservation Online System|publisher=U.S. Fish & Wildlife Service|access-date=27 November 2023}}</ref><ref name=fr88>{{Federal Register|88|14794}}</ref> | genus = Fusconaia | species = subrotunda | authority = ([[Isaac Lea|Lea]], 1831) | synonyms = {{collapsible list|bullets=yes|''Fusconaia subrotunda'' subsp. ''subrotunda'' <small>(Lea, 1831)</small>|''Fusconaia subrotunda'' subsp. ''pilaris'' <small>(Lea, 1840)</small>|''Fusconaia subrotunda'' subsp. ''kirtlandiana'' <small>(Lea, 1834)</small>|''Fusconaia subrotunda'' subsp. ''lesueuriana'' <small>(Lea, 1840)</small>|''Unio subrotundus'' <small>Lea, 1831</small>|''Unio kirtlandianus'' <small>Lea, 1834</small>|''Unio politus'' <small>Conrad, 1837</small>|''Unio pilaris'' <small>Lea, 1840</small>|''Unio lesueurianus'' <small>Lea, 1840</small>|''Unio globatus'' <small>Lea, 1871</small>|'' Unio bursapastoris'' <small>B.H. Wright, 1896</small>|''Quadrula flexuosa'' <small>Simpson, 1900</small>|''Quadrula andrewsii'' <small>Marsh, 1902</small>|'' Quadrula beauchampii'' <small>Marsh, 1902</small>|''Quadrula kirtlandiana'' subsp. ''minor'' <small>Simpson, 1900</small>|''Fusconaja subrotunda'' subsp. ''leucogona'' <small>Ortmann, 1913</small>}} |synonyms_ref=<ref>{{ITIS|taxon=''Fusconaia subrotunda'' (Lea, 1831)|id=80051|access-date=28 November 2023}}</ref> }}
'''''Fusconaia subrotunda''''', the '''longsolid''',<ref name=ecos/><ref name=fr88/> '''long solid mussel''' or '''long solid naiad''', is a [[species]] of [[freshwater mussel]], an [[Aquatic animal|aquatic]] [[bivalve]] [[mollusk]] in the family [[Unionidae]].
This mussel, sometimes called a pigtoe, is found in river gravel. Young mussels are light brown, but darken to nearly black with age.
This species is found in [[Canada]] and the [[United States]].
==Subspecies== * ''Fusconaia subrotunda kirklandiana'' * ''Fusconaia subrotunda lesueriana'' Lea * ''Fusconaia subrotunda pilaris'' Lea * ''Fusconaia subrotunda subrotunda''
==References== {{Reflist}} ==External links== * [http://www.inhs.uiuc.edu/cbd/musselmanual/page44_5.html long solid mussel]
{{Taxonbar|from=Q3013291}}
[[Category:Fusconaia|subrotunda]] [[Category:Bivalves described in 1831]] [[Category:Taxonomy articles created by Polbot]]
{{Unionidae-stub}}