REVIEW ARTICLE Caprellids (Crustacea: Amphipoda) from the Gulf of Mexico, with observations on Deutella mayeri, redescription of Metaprotella hummelincki, a taxonomic key and zoogeographical comments Author Paz-Ríos, Carlos E. Laboratorio de Bentos, Departamento de Recursos del Mar, Cinvestav, Merida, Mexico; Author Guerra-García, José M. Laboratorio de Biología Marina, Departamento de Zoología, Facultad de Biología, Universidad de Sevilla, Sevilla, España Author Ardisson, Pedro-Luis Laboratorio de Bentos, Departamento de Recursos del Mar, Cinvestav, Merida, Mexico; text Journal of Natural History 2014 2014-07-11 48 41 - 42 2517 2578 http://dx.doi.org/10.1080/00222933.2014.931481 journal article 10.1080/00222933.2014.931481 1464-5262 5194444 Caprella andreae Mayer, 1890 Caprella acutifrons f. Andreae Mayer, 1890: 51 , 55–56, pl. 2, fig. 38, pl. 4, figs 56, 70, 71. Chevreux and Fage, 1925: 452 , fig. 430a. Caprella andreae McCain, 1968: 19–22 , figs 8, 9. McCain and Steinberg, 1970 ; Cavedini, 1982 ; Krapp-Schickel, 1993: 777–778 , fig. 330. Aoki and Kikuchi, 1995: 54–58 , figs 1, 2. Ortiz et al., 2002 , fig. 18. Foster, Thomas, et al., 2004: 162, 171, fig. 9. Type locality Offshore New Jersey , Atlantic coast of USA ( 38°10′ N , 64°20′ W ) . Distribution Northeastern Atlantic; Mediterranean; Western Atlantic; Hawaii; Japan ( McCain 1968 ; Krapp-Schickel 1993 ; Minchin and Colmes 1993 ; Spivak and Bass 1999 ). Records in the Gulf of Mexico CUB: La Havana ( McCain 1968 ). USA : Key West ( McCain 1968 ); Padre Island ( Shirley 1974 ). Habitat Caprella andreae frequently occurs on floating objects (e.g. buoys, driftwoods) and on the carapace of the sea turtles Caretta caretta and Chelonia mydas ( Shirley 1974 ; Caine 1986 ; Aoki and Kikuchi 1995 ; Pfaller et al. 2008 ; Sezgin et al. 2009 ; Cabezas, Navarro-Barranco, et al. 2013), where it seems to be consumed incidentally by turtles ( Frick et al. 2009 ). The depth range reported is 0–2 m ( LeCroy et al. 2009 ). Remarks Caprella andreae is similar to Caprella penantis Leach, 1814 , but readily distinguished from the latter by the inflated peduncle of antenna 1 in males and the palm of pereopods 5–7 convex with medial grasping spines. Recently, Cabezas et al. (2010) have clearly separated C. andreae from the populations of C. penantis using molecular evidence, supporting the validity of these two species, which, along with Caprella dilatata Krøyer, 1843 were formerly considered as one under the ‘acutifrons’ complex. Although the review of Foster, Thomas, et al. (2004) suggests the presence of this species in the northern region of the Gulf of Mexico , those authors along with LeCroy et al. (2009) overlooked the Texas coast record of Shirley (1974) reporting C. andreae found on the carapace of the loggerhead sea turtle Caretta caretta . Thus, C. andreae has not been recorded in the Gulf of Mexico during the last 39 years.