Amphithyrus sculpturatus Claus, 1879

Gasca, Rebeca, Suárez-Morales, Eduardo & Hendrickx, Michel E., 2021, Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler, Zootaxa 5039 (4), pp. 479-494 : 483-484

Amphithyrus sculpturatus Claus, 1879

Amphithyrus sculpturatus Claus, 1879: 16 ; Siegel-Causey, 1982: 383; Vinogradov et al., 1996: 574, fig. 250; Brusca & Hendrickx, 2005: 153 (list); García Madrigal, 2007: 159 (list); Gasca, 2009: 90 (list); Lavaniegos & Hereu, 2009: 142 (tab. 1), 146 (tab. 2), 152 (Appendix); Gasca et al., 2012: 126 (tab. 1), 133 (tab. 4), 134; Lavaniegos, 2014: 5 (tab. 1), 8, 10 (tab. 4); Lavaniegos, 2017: 24; Valencia & Giraldo, 2012: 1493 (tab. 1); Valencia et al., 2013: 52 (tab. 1); Zeidler, 2016: 32, 33 (key).

Amphithyrus orientalis Stebbing, 1888: 1485‒1488 .

Material examined. 10M, 4F in 7 localities ( Fig. 2 ). TALUD III. St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991, 2M, 1F, I-K from surface to 600 m (TD, 1890 m) (ECO-CH-Z-10543); St. 25A1 (25°51’00”N, 109°57’00”W), August 21, 1991, 1M, I-K from surface to 200 m (TD, 1280‒1360m) (ICML-EMU-12880-A); St. 25A2 (25°50’54”N, 109°56’54”W), August 21, 1991, 1M, I-K from surface to 230 m (TD, 1250‒1328 m) (ICML-EMU-12880-B); St. 25B (25°43’18”N, 109°47’24”W), August 23, 1991, 1F, I-K from surface to 150 m (TD, ca. 1100 m) (ICML-EMU- 12880-C). TALUD V, St. 36 (25°54’30”N, 110°11’24”W), December 17, 2000, 1M, MN from surface to 1340 m (TD, 1990 m) (ICML-EMU-12881). TALUD VI, St. 36 (25°53’15”N, 110°10’06”W), March 17, 2001, 1F, MN from surface to 1360 m (TD, 2000 m) (ICML-EMU-12882). TALUD VII, St. 29 (25°17’31”N, 109°24’30”W), June 8, 2001, 5M, 1F, MN from surface to 1335 m (TD, 2080 m) (ICML-EMU-12883) .

Distribution. Atlantic (south of 40°N), Pacific (Kuroshio Current), and eastern Indian Oceans; Mediterranean and Red Seas; in the 0‒100 m layer ( Vinogradov et al. 1996). Off Australia ( Zeidler 1998). In the eastern Pacific from off the west coast of Baja California and the Gulf of California (north to 25°54’30”N) to off Gorgona Island, Colombia ( García Madrigal 2007, Valencia & Giraldo 2012, present study).

Remarks. The material of station 36 of the TALUD V cruise represents a slight extension of the northernmost distribution limit of A. sculpturatus in the Gulf of California. Zeidler (1998) considered this species as uncommon although widely distributed, mainly in tropical waters.

Siegel-Causey (1982) considered both A. orientalis Stebbing, 1888 , and A. glaber Spandl, 1924 , as junior synonyms of A. sculpturatus . However, A. glaber is currently recognized as a valid species ( Vinogradov et al. 1996), while A. orientalis has indeed been synonymized with A. sculpturatus by Spandl (1927: 250) (see Shih & Cheng 1995).

Figures

FIGURE 2. Localities where Amphithyrus muratus and A. sculpturatus were captured during this survey.