Hyperioides sibaginis (Stebbing, 1888) Hyperia sibaginis Stebbing, 1888: 1379, plate 165. Hyperioides sibaginis — 1379, plate 165; Siegel-Causey, 1982: 161 (key), 162; Vinogradov et al., 1996: 377 (key), 380, fig. 161; Zeidler, 2004: 32 (key), 34; Brusca & Hendrickx, 2005: 150 (list); García Madrigal, 2007: 149 (list); Valencia & Giraldo, 2009: 266–269 (passim), 268 (tab. 1), fig. 2; 2011: 1491‒1497 (passim), 1492 (tab. 1), 1496 (tab. 3), fig. 7c; Lavaniegos & Hereu, 2009: 142 (tab. 1), 143, 146 (tab. 2), 151 (Appendix 1); Gómez-Gutiérrez et al., 2014: 1019 (Table 3). Material examined. 154M, 182F in 24 localities (Fig. 3). TALUD I, St. 6 (23°15’54”N, 107°31’12”W), December 12, 1989, 2F, BO, from surface to ca. 200 m (TD, 1550 m) (ECO-CH-Z-10385). TALUD III. St. 3B (22°36’36”N, 106°35’54”W), August 17, 1991, 1M, 9F, I-K, from surface to 275 m (TD, 1585 m) (ICML-EMU-12779A); St. 6 (23º17’54”N, 107º30’18”W), August 18, 1991, 1M, AD from surface to 996‒1148 (ECO-CH-Z-10386); St. 10B (23°43’24”N, 107°39’06”W), August 18, 1991, 12M, 8F, I-K, from surface to 630 m (TD, ca. 900 m) (ICML-EMU- 12779B); St. 18 (ca. 25°N, 109°W), August 19, 1991, 1M, I-K (depth not registered) (ICML-EMU-12779C); St. 19 (25°12’00”N, 109°07’00”W), August 20, 1991, 28M, 48F, I-K, surface to 410 m (TD, 920 m) (ICML-EMU- 12779D); St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991, 2M, 2F, I-K, from surface to 600 m (TD, 1890 m) (ICML-EMU-12780A); St. 25A1 (25°51’00”N, 109°57’00”W), August 21, 1991, 27M, 18F, I-K, from surface to 200 m (TD, 1280‒1360 m) (ICML-EMU-12780B); St. 25A2 (25°50’54”N, 109°56’54”W), August 21, 1991, 43M, 69F, I-K, from surface to 230 m (TD, 1250‒1328 m) (ICML-EMU-12780C). TALUD IV. St. 15 (23°23’30”N, 107°47’48”W), August 24, 2000, 1F, MN, from surface to 1500 m (TD, 2350 m) (ICML-EMU-12781A); St. 25A2 (25°50’54”N, 109°56’54”W), August 21, 1991, 5M, 7F, I-K, from surface to 230 m (TD, not measured) (ICML-EMU-12781B). TALUD VI. St. 7 (22°21’39”N, 107°01’42”W), March 14, 2001, 5M, MN, from surface to 1305 m (TD, 2100 m) (ICML-EMU-12782A); St. 29 (25°16’24”N, 109°24’54”W), March 16, 2001, 6M, 17F, MN, from surface to 1440 m (TD, 2080 m) (ICML-EMU-12782B); St. 36(2) (25°53’15”N, 110°10’06”W), March 17, 2001, 2M, MN, from surface to 1360 m (TD, 2000 m) (ICML-EMU-12782C). TALUD VII, St. 15B (23°25’N, 107°49’W), June 7, 2001, 1M, 1F, MN, from surface to 1425 m (TD, 2320 m) (ICML-EMU-12783A); St. 29 (25°17’31”N, 109°24’30”W), June 8, 2001, 6M, MN, from surface to 1335 m (TD, 2080 m) (ICML-EMU-12783B). TALUD X. St. 7 (27°53’09”N, 112°16’42”W), February 10, 2007, 1M, MN, from surface to 900 m (TD, 1191 m) (ICML-EMU-12784A); St. 11 (27°34’16”N, 111°40’W), February 11, 2007, 3M, 1F, MN, from surface to 1215 m (TD, 1801 m) (ICML-EMU-12784B); St. 23 (27°00’30”N, 111°12’00”W), February 14, 2007, 1M, MN, from surface to ca. 1250 m (TD, 1770 m) (ICML-EMU-12784C). TALUD XI. St. 6A (16°58’00”N, 100°57’00”W), June 7, 2007, 6M, MN, from surface to 1400 m (TD, 1960 m) (ICML-EMU-12785A). TALUD XI. St. 19B (17°56’00”N, 103°10’00”W), June 9, 2007, 13M, MN, from surface to 1490 m (TD, 1750 m) (ECO-CH-Z-10383). TALUD XII. St. 4 (16°59’39”N, 100°58’07”W), March 28, 2008, 2M, MN, from surface to 1200 m (TD, 1995 m) (ICML-EMU- 12785B); St. 28B (18°56’00”N, 104°59’57”W), April 2, 2008, 1M, MN, from surface to 1425 m (TD, 2041 m) (ICML-EMU-12785C). Distribution. Pacific Ocean. In the eastern Pacific from California, USA, and the Gulf of California, Mexico, to Panama (Brusca & Hendrickx 2005, García Madrigal 2007). Remarks. Siegel-Causey (1992) reported H. sibaginis as an uncommon species in the southern Gulf of California, with a distribution pattern similar to H. longipes. According to García Madrigal (2007) this species occurs between 0‒ 200 m. It was one of the two most abundant species in this survey.

Published as part of Gasca, Rebeca & Hendrickx, Michel E., 2021, Pelagic amphipods (Crustacea: Amphipoda: Hyperiidea) in western Mexico. 3 Family Lestrigonidae, pp. 169-187 in Zootaxa 4974 (1) on pages 174-175, DOI: 10.11646/zootaxa.4974.1.8, http://zenodo.org/record/4772335