Isópodos litorales y de aguas someras de la bahía de Todos los Santos, Baja California, México

Abstract

Se presenta una lista de los isópodos de vida libre de la bahía de Todos los Santos con base en recolecciones alocrónicas realizadas entre 1988 y 2005 en el intermareal rocoso, arenoso y limo-arcilloso así como en el sublitoral arenoso hasta una profundidad de 256 m. Se recolectaron 26 especies de las 48 registradas para la Provincia Californiana: 2 Asellota; 7 Cymothoida; 1 Oniscoidea; 7 Sphaeromatidea; 9 Valvifera Las especies más abundantes fueron Excirolana linguifrons (Richardson, 1899), (mesolitoral arenoso), Idotea fewkesi Richardson, 1905 junto con Idotea resecata Stimpson, 1857, (mesolitoral rocoso), Haliophasma geminatum Menzies et Barnard, 1959 (mesolitoral e infralitoral arcilloso asociada al pasto marino Zostera marina Linnaeus) y Caecognathia crenulatifrons (Monod, 1926), (sublitoral). Las especies recolectadas se ha registrado en biotopos marinos similares de California, Estados Unidos de América. De las 26 especies encontradas 7 son primeros registros para México:

Review and guide to the isopods (Crustacea, Isopoda) of littoral and sublittoral marine habitats in the Southern California Bight

“…Of these, I. allelomorphus is the most common, occurring in soft-bottom continental shelf sediments at depths < 100 m from central California to Baja California Norte (see Menzies and Barnard 1959 ; Wetzer and Brusca 1997 ; Campos and Villarreal 2008 ). A second species, I.…”

“…Body length to ~ 8 mm. See Menzies and Barnard (1959 original description as Haliophasma geminata ; gender of specific name corrected to geminatum in Boyko et al 2008 onwards), Menzies (1962a) , Schultz (1964 , 1966 , 1969 ), Lie (1968) , Iverson (1974) , Poore (1975) , Gillard (1978) , Lissner et al (1986) , Poore and Lew Ton (1988a) , Wetzer et al (1991) , Cadien and Brusca (1993) , Thompson et al (1993) , SCAMIT (1994 – 2021 ), Wetzer and Brusca (1997) , Bergen et al (1998 , 2001 ), Smith et al (2001 , 2003 ), Ranasinghe et al (2003 , 2007 , 2012 ), McLaughlin et al (2005) , Espinosa-Pérez and Hendrickx (2006) , Campos and Villarreal (2008) , Macdonald et al (2010) , Puget Sound Institute (2012–2023) , Gillett et al (2017 , 2019 , 2022 ), and Henkel et al (2020) .…”

“…Body length to ~ 7 mm. See Menzies and Barnard (1959) , Schultz (1964 , 1969 ), Allen (1976) , Wägele (1984b) , Wetzer et al (1991) , Cadien and Brusca (1993) , Chess and Hobson (1997) , Espinosa-Pérez and Hendrickx (2001a) , McLaughlin et al (2005) , Campos and Villarreal (2008) , and SCAMIT (2012 – 2021 ).…”

“…There are a number of general monographs, natural history guides, taxonomic keys, and other works relevant to the coastal marine invertebrates of the northeastern Pacific Ocean that contain useful information on SCB isopods even though many are focused on regions further to the north or south and in the Gulf of California (e.g., Richardson 1905a ; Ricketts and Calvin 1952 , 1968 ; Menzies and Barnard 1959 ; Johnson and Snook 1967 ; Schultz 1969 ; Kozloff 1974 , 1983 , 1996 ; Miller 1975 ; Allen 1976 ; Brusca and Brusca 1978 ; Brusca 1980 ; Lee and Miller 1980 ; Ricketts et al 1985 ; Hinton 1987 ; Wetzer and Brusca 1997 ; Wilson 1997 ; O’Clair and O’Clair 1998 ; Sept 2002 , 2019 ; Brusca et al 2004 , 2007 ; Kerstitch and Bertsch 2007 ). Additional information is included in several species checklists (e.g., Leistikow and Wägele 1999 ; Espinosa-Pérez and Hendrickx 2001a , 2006 ; Schmalfuss 2003 ; Campos and Villarreal 2008 ). However, except for treatments of the southern California coastal shelf and submarine canyons from more than 50 years ago ( Menzies and Barnard 1959 ; Schultz 1966 ), a more recent survey of the offshore benthos of the Santa Maria Basin and Western Santa Barbara Channel in the northern SCB ( Wetzer and Brusca 1997 ; Wilson 1997 ), and a guide to the intertidal and supralittoral species of the California and Oregon coasts ( Brusca et al 2007 ), most information on the coastal isopods of the region remains scattered amongst various taxonomic or ecological contributions.…”

Six new species of Anthuridae (Peracarida: Isopoda) from the southern Mexican Pacific

“…The Anthuridae family have been poorly studied in the Mexican Pacific, and the few studies available are focused on the northern region of the Pacific of Mexico. Among them stand out the descriptions of two species from Gulf of California, Cortezura penascoensis and Mesanthura nubifera Wägele, 1984. Additionally, in the Western coast of Baja California, Menzies (1962) and Campos & Villarreal (2008) recorded to Haliophasma geminata Menzies & Barnard, 1959 and Mesanthura occidentalis Menzies & Barnard, 1959; in the Gulf of California, Brusca (1980) In this study, we describe six new species of Anthuridae from southern Mexican Pacific, belonging to five genera.…”