Fanshell

The fanshell (Cyprogenia stegaria) is a species of aquatic bivalve mollusk in the family Unionidae. This clam is native to the United States, where breeding populations remain in only three rivers. It is a federally listed endangered species of the United States.^[2][3]

This clam is known to be reproducing in the Clinch River in Tennessee and Virginia, and the Green and Licking Rivers in Kentucky. There may be a small reproducing population in the Tennessee River. There also may be some small populations remaining in several states, but these are not reproducing.^[5]

This species is threatened by the loss and degradation of its habitat.^[3]

Reproduction

All Unionidae are known to use the gills, fins, or skin of a host fish for nutrients during the larval glochidia stage. Cyprogenia stegaria release into the water a conglutinate mimicking an Oligochaeta worm which contains the mussel's young. When a fish bites into the conglutinate lure, the young glochida are released and latch onto the fish's gills for nutrients.^[5]

References

Cyprogenia stegaria es una especie de molusco bivalvo de la familia Unionidae.

Distribución geográfica

Es endémica de los Estados Unidos.

Referencias

• Bogan, A.E. 1996. Cyprogenia stegaria. 2006 IUCN Red List of Threatened Species.

Cyprogenia stegaria er en art av dammuslingfamilien innen klassen muslinger som lever i ferskvann.

Systematisk inndeling

Klassifikasjon etter WoRMS.^[3]

• Rekke: Bløtdyr (Mollusca) - 60 000 arter Cuvier, 1795
  • KLASSE Muslinger (Bivalvia) - ca. 15 000 arter Linnaeus, 1758
    • Underklasse Palaeoheterodonta Newell, 1965
      • Orden Unionida Stoliczka, 1871
        • Overfamilie Unionoidea Rafinesque, 1820
          • Familie Dammuslingfamilien (Unionidae) Fleming, 1828
            • Underfamilie Ambleminae
              • Slekt Cyprogenia Agassiz, 1852
                • Cyprogenia aberti Conrad, 1850
                  • Underart Cyprogenia aberti lamarckiana I. Lea, 1852 = Cyprogenia aberti Conrad, 1850
                • Cyprogenia stegaria Rafinesque, 1820
                  • Underart Cyprogenia stegaria pusilla Simpson, 1900 = Cyprogenia stegaria Rafinesque, 1820
                • Cyprogenia irrorata I. Lea, 1827 = Cyprogenia stegaria Rafinesque, 1820
                  • Underart Cyprogenia irrorata irrorata I. Lea, 1827 = Cyprogenia stegaria Rafinesque, 1820
                  • Underart Cyprogenia irrorata pusilla Simpson, 1900 = Cyprogenia stegaria Rafinesque, 1820

Referanser

Eksterne lenker

• (en) Cyprogenia stegaria – oversikt og omtale av artene i WORMS-databasen
• (en) Cyprogenia stegaria i Encyclopedia of Life
• (en) Cyprogenia stegaria i Global Biodiversity Information Facility
• (en) Cyprogenia stegaria hos NCBI
• (en) Cyprogenia stegaria hos ITIS

Cyprogenia stegaria é uma espécie de bivalve da família Unionidae.

É endémica dos Estados Unidos da América.

Referências

• (em inglês) Bogan, A.E. 1996. Cyprogenia stegaria. 2006 IUCN Red List of Threatened Species. Dados de 6 de Agosto de 2007.