Thyone crassidisca Pawson and Miller 1981

Figure 20

Thyone crassidisca Pawson and Miller, 1981: 400, figs. 1, 2B, 4; Miller and Pawson, 1984: 37, figs.29, 30.

Material examined. USNM E21113, Florida, E of New Smyrna Beach, 30°00'N, 80°52'W, R/V Gosnold, Sta 621, Aug. 16, 1974, 27m. USNM E19453, off S.C., 32°05'N, 79°38'W, R/V Pierce, Sta 3D, Feb. 17, 1977, 33m. USNM E19533, off Georgia., 31°03'N, 80°26'W, R/V Pierce, Sta 5E, Feb. 26, 1977, 34m. USNM E19534, off Georgia., 31°01'N, 80°17'W, R/V Pierce, Sta 5F, Aug. 30, 1977, 40m, 2. USNM E19535, off Georgia., 31°01’N, 80°17'W, R/V Pierce, Sta 5F, Nov. 24, 1977, 40m. USNM E19573, off Georgia., 30°59'N, 80°08'W, R/V Pierce, Sta 5G, July 16, 1979, 20m. USNM E19704, off Florida, 29°28'N, 80°57'W, R/V Pierce, Sta 7B, July 16, 1979, 34m. USNM E19705, off Florida., 29°28'N, 80°57'W, R/V Pierce, Sta 7B, May 21, 1977, 20m. USNM E20287, off Florida., 29°34'N, 80°22'W, R/V Pierce, Sta 7D, Nov. 27, 1977, 44m. USNM E22484, N.C., 33°57’30”N, 77°01'W, R/V Silver Bay Sta 1695, Feb. 29, 1960, 35m. USNM E41653, S.C., 32°29’06”N, 78°49’06”W, R/V Oregon Sta OS06, August 6, 1981, 54m.

Diagnosis. Body fusiform, up to 60 mm long, tapering toward bluntly rounded ends. Color whitish to light brown, with darker patches. Feet numerous, scattered over entire body; strongly contracted in preserved specimens. Tentacles 10, ventral pair smaller. Body wall tables (70–110 μm) with 4 perforations and spire terminating in single blunt spine.

Distribution. NC to FL, Eastern Gulf of Mexico.

Habitat. Quartz sand and crushed shell. 6– 45 m.

Remarks. Nothing is known of the biology of this species.