Mussel of the

Page last updated
27 February 2008

Mussel of the Month

The March 2008 Mussel of the Month is Ensidens ingallsianus. Ensidens is a genus of only two species in the Indotropics.

Ensidens ingallsianus
USNM 84708. Siam [Thailand].
(type of U. pazii Lea, 1862).

We know very little about Ensidens ingallsianus except that it belongs to the family Unionidae; its affinities within that family have not been evaluated phylogenetically. The genus is generally distributed in SE Asia (Cambodia, Thailand, Vietnam, Laos, and Malayan Peninsula). E. ingallsianus has unhooked glochidia and broods its larvae in all four demibranchs ("gills").


Phylum Mollusca
Class Bivalvia
Subclass Palaeoheterodonta
Order Unionoida

Superfamily UNIONOIDEA Rafinesque, 1820

Family UNIONIDAE s.s.

Genus Ensidens Frierson, 1911

Species Ensidens ingallsianus (Lea, 1852)

For more information about Ensidens, check out:
  • Woodward, F.R. 1969. The morphology of Ensidens ingallsianus (Lea, 1852) and Scabies crispata (Gould, 1843). Vidensk Meddr dansk naturh. Foren 132: 49-62.
  • Brandt, R.A.M. 1974. The non-marine aquatic Mollusca of Thailand. Archiv für Molluskenkunde 105(1-4): 1-423.
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