Thyone deichmannae Madsen, 1941

Figure 21

Thyone fusus (O.F. Müller) ?.— Deichmann, 1930: 167, pl. 14 figs. 1–5.

Thyone deichmannae Madsen, 1941: 26; Hendler et al, 1995: 276, figs.153, 182H - J.

Thyone inermis .— Pawson and Miller, 1981: 394; Miller & Pawson, 1984: 40, figs 32, 33.

Not Thyone inermis Heller, 1868 .

Material examined. USNM E16416, N.C., R/V Eastward E-56-65, N.C., 34°31.1’N, 75°55’W, Oct 27, 1965, 80m, 4(as fusus). USNM E16417, N.C., R/V Eastward 1423, 1965, 60m, (as fusus). USNM E19681, off Florida., 30°23'N, 80°18'W, R/V Pierce, Sta 6F, Sept. 1, 1977, 48m, (as fusus). USNM E19754, off Florida., 29°34'N, 80°22'W, R/V Pierce, Sta 7D, Sept. 2, 1977, 44m, (as fusus). USNM E19755, off Florida., 29°34'N, 80°22'W, R/V Pierce, Sta 7D May 20, 1977, 44m, (as fusus). USNM E32246, off N.C., 33°32’12”N, 77°25’06”W, R/V Eastward, Sta MS04, Sept. 4, 1980, 29m, (as inermis). DML 1387, 33 º54.6'N, 76º23.2'W, R/V Eastward E-28-65, May 21, 1965, 64 m. DML 1401, 34 º26.5'N, 75º58.1'W, R/V Eastward E-28-65, May 21, 1965, 60 m. DML 1505, 34 º28.8'N, 76º13.4'W, R/V Eastward E-54-65, October 12, 1965, 28 m.

Diagnosis. Body cylindrical, up to 120 mm long, covered with numerous hair-like feet arranged in indistinct double rows along radii, scattered in interradii. Color grayish-brown. Tentacles 10, ventral pair smaller. Ossicles tables (65–135 μm) with more than 4 perforations; spire of supporting tables gently tapering.

Distribution. NC to FL, Gulf of Mexico.

Habitat. Soft sediment such as crushed shell, quartz sand, and calcareous silt. 6– 366 m.

Remarks. Pawson and Miller (1981: 395) tentatively accepted Madsen’s (1941) opinion that the western Atlantic specimens formerly referred to the European species Thyone inermis Heller, 1868 should be referred to another species, for which the name T. deichmannae Madsen was available, but it was not until the publication of Hendler et al. (1995) that this step was formally taken.