Mediomastus ambiseta (Hartman, 1947)

Capitita ambiseta Hartman, 1947: 409, Pl. 45, figs 1-4; 1969: 369, figs 1-4; Reish 1963: 428; 1968: 89.

Mediomastus ambiseta Warren et al., 1994: 234, figs 2a, 5 d–f, 6 a–f, 12; Blake 2000: 76, fig. 4.11; Dean 2001: 76; 2004: 136.

Type locality.

Newport Harbour Bay, Corona del Mar, Californa, USA [33°36'04"N, 117°52'48"W], June 2 1942, intertidal.

Type material.

Holotype (LACM-AHF POLY 1451-42, Poly 0449).

Material examined.

(41 specimens) Baja California: Todos Santos Bay, Stn. V-1 [116°39.4'N, 31°46"W] (5 specimens) 6 m, October 9 1979; [116°39.7'N, 31°45"W] (3 specimens), October 15 1989; San Quintín Bay, Stn. 13 [30°27'48"N, 115°57'46"W] (8 specimens), November 18 1982; Sinaloa: Off Ohuira Bay, Stn. B-2 [25°35'54"N, 109°20'12"W] (25 specimens), September 17 1989; Sinaloa: Topolobampo Bay (UANL-1613) [17°56'53"N, 102°5'9"W] (2 specimens), September 17 1989, Coll. JALG.

Records.

USA:California (Hartman 1947, Blake 2000; México: Baja California, San Quintín Bay (Reish 1963), Costa Rica (Dean 2001, 2004). México: Baja California, Sinaloa (present study).