Review of the Capitellidae (Annelida, Polychaeta) from the Eastern Tropical Pacific region, with notes on selected species Author Garcia-Garza, Maria Elena Author Leon-Gonzalez, Jesus Angel De text ZooKeys 2011 151 17 52 http://dx.doi.org/10.3897/zookeys.151.1964 journal article http://dx.doi.org/10.3897/zookeys.151.1964 1313-2970-151-17 Mediomastus californiensis Hartman, 1944 Mediomastus californiensis Hartman, 1944: 264 Pl. 26, fig. 64; Hartman 1947 : 408, Pl. 46, figs 3-4; 1963 : 63; 1969 : 387, figs 1-4; Day 1973 : 99; Hutchings and Rainer 1979 : 779; Ewing 1984a : 14.14, figs 14-10 a-c; Warren et al. 1994 : 239, figs 2b, 7 c-d , 9 a-d , 12; de Leon Gonzalez 1994 : 62; Hernandez-Alcantara and Solis-Weiss 1998 : 710; Blake 2000 : 78, fig. 4.12 a-d ; Dean 2001 : 78; 2004 : 136. Type locality. California, Tomales Bay, USA [ 28°25'N , 123°W], June 8 1941, intertidal. Type material. Holotype (LACM-AHF POLY 0428). Material examined. (408 specimens) Baja California Sur: La Paz Bay, Ensenada de La Paz, Stn. 1 [ 24°06'50.3"N , 110°25'12.0"W ] (10 specimens); Stn. 3 [ 24°07'09.9"N , 110°21'18.2"W ] (1 specimen); Stn. 4 [ 24°08'29.9"N , 110°21'08.7"W ] (20 specimens); Stn. 8 [ 24°09'50.7"N , 110°21'38.0"W ] (8 specimens); Stn. 10 [ 24°09'55.1"N , 110°25'26.2"W ] (42 specimens); Stn. 11 [ 24°08'28.9"N , 110°25'41.9"W ] (7 specimens); Stn. 12 [ 24°07'37.3"N , 110°25'10.6"W ] (4 specimens), 17 August 2005, 0.15 m; Stn. 1 (6 specimens); Stn. 2 [ 24°06'30.6"N , 110°24'05.1"W ] (23 specimens); Stn. 3 (16 specimens); Stn. 6 [ 24°09'59.8"N , 110°19'37.5"W ] (2 specimens); Stn. 8 (13 specimens); Stn. 11 (6 specimens) 5-7 m, 27 November 2005, Coll. DHV; Stn. 1 (17); Stn. 2 (59 specimens); Stn. 3 (51 specimens); Stn. 4 (2 specimens); Stn. 7 [ 24°09'00.0"N , 110°21'38.0"W ] (1 specimen); Stn. 8 (6 specimens); Stn. 9 [ 24°10'13.9"N , 110°24'26.2"W ] (3 specimens); Stn. 10 (9 specimens); Stn. 11 (1 specimen); Stn. 12 (1specimen) 30 m, 6 March 2006, Stn. 1 (5 specimens), Stn. 2 (17 specimens); Stn. 3 (3 specimens); Stn. 4 (4 specimens); Stn. 5 [ 24°08'53.4"N , 110°20'17.3"W ] (1 specimen); Stn. 8 (7 specimens), Stn. 9 (4 specimens), Stn. 10 (15 specimens); Stn. 11 (4 specimens); Stn. 12 (1 specimen) 0.15 m, June 1 2006, Coll. DHV; Manglar Zacatecas (UANL-6425) [ 24°9'56.2"N , 110°25'55.6"W ] ( 2 specimens), 24 June 2005; (UANL 6422) (15 specimens), 1 m, 1 August 2006; Enfermeria Beach (UANL-6424) [ 24°13'55.6"N , 110°18'23.7"W ] (2 specimens), 0.15 m, June 24 2005; El Conchalito Beach (UANL-6423) [24°08'23.4"N, 110°21'05.8"W] (20 specimens), 1 m, August 1 2006, Coll. JALG and MEGG. Records. USA: Oregon to California ( Hartman 1944 , 1947 , 1963 , 1969 , Blake 2000 ); North Carolina ( Day 1973 ); Florida ( Ewing 1984a ); Australia ( Hutchings and Rainer 1979 ), California, Florida, North Carolina and British Columbia (Warren 1994), Costa Rica ( Dean 2001 , 2004 ). Mexico : Baja California, Sonora ( Hernandez-Alcantara and Solis-Weiss 1993 , 1998 ), Baja California Sur ( de Leon-Gonzalez 1994 , present study).