Pelagic amphipods (Crustacea: Amphipoda: Hyperiidea) in western Mexico. 7 Superfamily Platysceloidea. Family Oxycephalidae Author Gasca, Rebeca 0000-0002-9716-1964 El Colegio de la Frontera Sur, Unidad Chetumal, Av. del Centenario km 5.5, Chetumal, Quintana Roo, 77014, Mexico. rebegasca @ gmail. com; https: // orcid. org / 0000 - 0002 - 9716 - 1964 & Currently retired. rebegasca@gmail.com Author Hendrickx, Michel E. Laboratorio de Invertebrados Bentónicos, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, PO Box 811, Mazatlán, 82000 Sinaloa, Mexico. text Zootaxa 2022 2022-03-03 5105 2 219 236 journal article 20349 10.11646/zootaxa.5105.2.3 d9ad8d5b-dd70-4efe-8a01-76ea5babc6b8 1175-5326 6332529 2B46C765-C80B-437B-B8C2-95335D589E9F Streetsia steenstrupi ( Bovallius, 1887 ) Oxycephalus Steenstrupi Bovallius, 1887: 37 . Streetsia steenstrupi .— Brusca, 1981: 13 (list), 33 (key), fig. 23c, j; Stebbing, 1888: 365 (key), 371; Vinogradov et al ., 1996: 511 (key), 514‒516, fig. 223; García Madrigal, 2007: 158 (list); Gasca, 2009: 89 (tab. 1); Lavaniegos & Hereu, 2009: 142 (tab. 1), 152 (appendix); Lavaniegos, 2014: 5 (tab. 1); Valencia et al ., 2013: 52 (tab. 1); Zeidler, 2016: 93‒96 (passim), 96 (key). Material examined . 2M in one locality ( Fig. 5 ). TALUD IV . St. 15 ( 23°23’30”N , 107°47’48”W ), August 24, 2000 , 2M , MN from surface to 1500 m (TD, 2350 m ) (ICML-EMU-12981) . Distribution . Tropical and subtropical oceans. In the eastern Pacific from California to Panama ( Vinogradov et al . 1996 , García Madrigal 2007, Valencia et al . 2013 ). Present in the SE Gulf of California (this study). Remarks . The two males examined were young specimens (about 7 mm long). Both feature the characteristics of S. steenstrupi . Not recorded previously by Siegel-Causey (1982) in the Gulf of California , Streetsia steenstrupi has been previously reported from the Mexican portion of the California Current ( Lavaniegos & Hereu 2009 , Lavaniegos 2014 ). During our survey it was recorded only in one locality in the Gulf of California ( Fig. 5 ).