Black Sandshell - Ligumia recta
Federal Status: Not listed (Watters 1995)
Ohio Status: Threatened (Watters 1995)
Key characteristics: Elongate shell, pointed on the posterior end, smooth surface, usually dark brown to black, with a pinkish or purple nacre (Cummings, Mayer 1992).
Similar species: Spike, spectaclecase, yellow sandshell (Cummings, Mayer 1992).
Description: Shell elongate, solid, and moderately compressed. Anterior end rounded, posterior end pointed in males, saber-shaped in females. Dorsal margin straight, ventral margin straight to curved. Umbos low, only slightly elevated above the hinge line. Beak sculpture, if visible, of two or three indistinct, double-looped bars. Shell smooth and shiny, dark green, brown, or black, with green rays visible on some individuals. Length to 8 inches (20.3 cm) (Cummings, Mayer 1992).
Pseudocardinal teeth triangular, serrated, and divergent; two in the left valve, one in the right, occasionally with a small tooth anteriorly. Lateral teeth long, moderately thin, and straight. Beak cavity shallow. Nacre variable from white, pink, and salmon to deep purple, iridescent posteriorly (Cummings, Mayer 1992).
Hosts: Black and largemouth bass, bluegill, sauger, walleye, white crappie (Watters 1995).
Habitat: Medium to large rivers in riffles or raceways in gravel or firm sand (Cummings, Mayer 1992).
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