Page 234 - The Freshwater Mussels of Oklahoma

Partial Synonymy:
Lampsilis corvunculus (Lea), Isely 1925
Carunculina parva, Isely 1925
Carunculina glans (Lea 1831), Branson 1984
Description:
“Quadrate, stout; dorsal line nearly straight, ventral margin straight, often
concave; anterior end uniformly rounded, posterior end sharply angled above and broadly
rounded below. Among the few specimens collected in Missouri, size does not exceed 3
cm; moderately inflated; posterior ridge broadly rounded. Beaks broad, low,
inequipartite; beak sculpture consists of three or four concentric bars, often incomplete.
Growth-rest lines concentric, not prominent, often marked by color changes. Epidermis
dark brown, sometimes faint hints of green on newest parts of shell, only a suggestion of
rays which are usually confined to the anterior half.
Left valve has two erect, triangular, flattened pseudocardinal teeth, the anterior
one elongate; there are two long, nearly straight, striated lateral teeth. Right valve has a
large elongate, roughened pseudocardinal tooth; there is a low, lamellar tooth anteriorly;
lateral tooth long; a small shelflike accessory tooth usually can be seen ventral to the
main tooth. Interdentum absent; beak cavity moderately deep; nacre, in the center to the
pallial line, is a rusty purple; beyond the pallial line the nacre is a lighter purple or white;
iridescent posteriorly” (Oesch, 1984).
Comments:
Currently no specimens of this species have been located. Isely (1925) reported
the species from Fourteenmile Creek and the Illinois River. This species occurs in the
Spring and Elk Rivers just across the state line from Oklahoma in Missouri. This species
almost certainly occurs in the state.

233