Decamastus nudus Thomassin, 1970

Garcia-Garza, Maria Elena & Leon-Gonzalez, Jesus Angel De, 2011, Review of the Capitellidae (Annelida, Polychaeta) from the Eastern Tropical Pacific region, with notes on selected species, ZooKeys 151, pp. 17-52 : 22

Decamastus nudus Thomassin, 1970

Decamastus nudus Thomassin, 1970: 81; Hernández-Alcántara and Solís-Weiss 1993: 1033; Hernández-Alcántara and Solís-Weiss 1998: 709; Hernández-Alcántara and Solís-Weiss 1999: 27; Dean 2001: 73; 2004: 136.

Type locality.

S.W. of Madagascar, in Tuléar region.

Type material.

Not seen

Material examined.

(21 specimens) Baja California: Rocks Consag, Stn. 39 [30°59.4'N, 114°04.1'W] (1 specimen), 106.4 m, silty sand, March 16 1985; Sonora: North Tiburón Island, Sta. 26 [29°23.3'N, 112°30.7'W] (7 specimens), 71.9 m, fine sand, March 14 1985; Cabo San Miguel, Sta. 20 [28°08.0'N, 112°45.8'W] (10 specimens), 54.1 m, fine sand, March 13 1985; Santa María Bay,Stn. 3 [25°02.4'N, 108°31.7'W] (3specimens), 32 m, March 10 1985; Punta San Marcial, Sta. 10 [25°58.6'N, 111°06.9'W] (7 specimens), 39 m, March 11 1985, Coll. PH-A & VS-W

Records.

Madagascar ( Thomassin 1970), Costa Rica ( Dean 2001; 2004)

Remarks.

Decamastus nudus , described from Madagascar, was reported by Hernández-Alcánatra and Solís-Weiss (1993, 1998, 1999) for the Gulf of California, but these specimens differ from the original description of Thomassin (1970), in having prostomium with palpode, dark brown eyespots, epithelium smooth on first segments, and hooded hooks with a main fang with four rows of small teeth. Decamastus nudus lacks a palpode, has orange pigment spots, the first 3-4 segments are slightly tessellated, and hooded hooks with a main fang and 2-3 rows of small teeth. We consider that these specimens belong to a different species not previously described. For that the record of Decamastus nudus from Gulf of California is erroneous.