Pelagic amphipods (Crustacea: Amphipoda: Hyperiidea) in western Mexico. 6. Superfamily Vibilioidea. Families Paraphronimidae and Vibiliidae 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. rgasca @ ecosur. mx; https: // orcid. org / 0000 - 0002 - 9716 - 1964 rgasca@ecosur.mx 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 2021 2021-11-25 5071 4 563 578 journal article 3300 10.11646/zootaxa.5071.4.5 084d8de1-dab3-4d6e-9db0-69e853c39709 1175-5326 5726520 B81C6E57-229D-4AA4-BA87-8EF6BD135F2B Paraphronima gracilis Claus, 1879 Paraphronima gracilis Claus, 1879: 7 (65)‒8 (66), pl. 1, figs. 4‒5; Siegel-Causey, 1982: 139 (key), 143; Vinogradov et al ., 1996: 314‒316 , fig. 126; Zeidler, 2003: 89 (key), 89‒91, fig. 37A; Brusca & Hendrickx 2005: 149 (list); García Madrigal, 2007: 143 (list); Guillén Pozo, 2007: 20 (key), 39, fig. 9, 149 (tab. 40), 178‒179 (passim); Lavaniegos & Hereu, 2009: 142 (tab. 1), 146 (tab. 2), 151 (appendix 1); Gasca et al ., 2012: 126 (tab. 1); Valencia et al . 2013: 51 (tab. 1); Lavaniegos, 2014: 3‒7 (passim), 4 (tab. 1), 10 (tab. 4); 2017: 18‒24 (passim), 18 (tab. 2); 2021: 9. Paraphronima edwardsi Bovallius, 1885: 12 . Material examined . 9M, 10F from six localities ( Fig. 1 ). TALUD III . St. 3B ( 22°36’36”N , 106°35’54”W ), August 17, 1991 , 1F, IK from surface to 275 m ( TD , 1585 m ) (ICML-EMU-12833-A); St. 19 ( 25°12’00”N , 109°07’00”W ), August 20, 1991 , 2F, I-K, surface to 410 m ( TD , 920 m ) (ICML-EMU-12833-B); St. 25A1 ( 25°51’00”N , 109°57’00”W ), August 21, 1991 , 1M, IK from surface to 200 m ( TD , ca. 1320 m ) (ICML-EMU-12833-C); St. 19B ( 25°18’24”N , 109°18’36”W ), August 20, 1991 , 1M, 2F, IK from surface to 600 m ( TD , 1890 m ) (ICML-EMU- 12833-D). TALUD IV , St. 7 ( 22°00’22”N , 106°49’18”W ), August 23, 2000 , 6M, MN from surface to 500 m ( TD , 1970 m ) (ICML-EMU-12834-A); St. 15 ( 23°23’30”N , 107°47’48”W ), August 24, 2000 , 2F, MN from surface to 1500 m ( TD , 2350 m ) (ICML-EMU-12834-B). TALUD V . St. 5 ( 22°00’57”N , 106°40’00”W ), December 13, 2000 , 2M, 3F, MN from surface to ca 1400 m ( TD > 1600 m ) (ECO-CH-Z-10548) . Distribution . Cosmopolitan in tropical and subtropical water, including the Mediterranean Sea ( Vinogradov et al . 1996 ). In the eastern Pacific it ranges from the west coast of the Baja California Peninsula (north to 27°38’14”N ) to Michoacán , including the Gulf of California, Mexico , and off Panama and Ecuador (García Madrigal 2007, Guillén Pozo, 2007 , Valencia et al . 2013 ). Remarks . Found mostly to 500 m depth ( Vinogradov et al . 1996 ), but García Madrigal (2007) recorded it from 1230‒1800 m .