Family Margaritiferidae, seven genera listed by Banarescu.
Genus Margaritifera,
eight species;
M. margaritifera
(L., 1758) Eastern Canada
and New England, northern Europe, Asia.
M. falcata (Gould,
1850) Northwestern North
America.
M. dahurica
(Middendorff, 1850) Anur
basin and Russian Maritime Territory.
M. middendorffi
Rosen, 1926 Kamchatka.
M. sachalinensis
Shadin, 1938 Sakhalin
rivers.
M. hembeli
(Conrad 1838) Endemic to
streams in Louisiana, USA.
M. marrianae R.
I. Johnson, 1983 Alabama
streams. Until recently this was considered
conspecific with M. hembeli, above.
M. auricularia
(Spengler, 1793) Iberian
peninsula. Recently thought to have been extinct,
until a surviving population was discovered in a
river in Spain.
Cumberlandia
monodonta (Say, 1829) One species. Tennessee tributaries, and central United
States.
Ptychorhynchus Eastern
China and Yangtse.
Heudeana Eastern China and
Yangtse.
Margaritanopsis Southeast
Asia.
Shepmania Borneo.
Ctenodesma Borneo.
Cumberlandia monodonta (Say, 1829) Spectacle Case. Tennessee tributaries, and
central United States unpolluted rivers.
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Margaritifera falcata (Gould,
1850)
Photo courtesy Dr. D. L. Gustafson.
Populations in the upper tributaries of the
Missouri in Montana are included with the
eastern M. margaritifera by some
authors,
although they share the trait of purple nacre
with M. falcata of the nearby
Pacific
drainages.
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