Amphithyrus bispinosus 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 : 481

Amphithyrus bispinosus Claus, 1879

Amphithyrus bispinosus Claus, 1879: 15 ; Siegel-Causey, 1982: 379; Vinogradov et al., 1996: 568, fig. 246; Brusca & Hendrickx, 2005: 153 (list); García Madrigal, 2007: 159 (list); Gasca 2009: 90 (list); Lavaniegos & Hereu, 2009: 152 (Appendix); Gasca et al., 2012: 126 (tab. 1); Valencia & Giraldo, 2012: 1493 (tab. 1); Valencia et al., 2013: 52 (tab. 1); Zeidler, 2016: 32, 33 (key), fig. 9.

Material examined. 19M, 51F from 17 stations ( Fig. 1 ). TALUD I. St. 5 (ca. 23°16’ N, 107°31’W), December 11, 1989, 3M, 1F, BO from surface to ca. 200 m (TD> 1500 m) (ICML-EMU-12869-A); St. 6 (23°15’54”N, 107°31’12”W), December 12, 1989, 1M, 9F, BO from surface to ca. 200 m (TD, 1550 m) (ICML-EMU-12869-B). TALUD III, St. 10B (23°43’24”N, 107°39’06”W), August 18, 1991, 1M, I-K from surface to 630 m (TD, ca. 900 m) (ICML-EMU-12870-A); St. 19 (25°12’00”N, 109°07’00”W), August 20, 1991, 1M, 2F, I-K, surface to 410 m (TD, 920 m) (ECO-CH-Z-10540); St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991, 2F, I-K from surface to 600 m (TD, 1890 m) (ICML-EMU-12870-B); St. 25A1 (25°51’00”N, 109°57’00”W), August 21, 1991, 1F, I-K from surface to 200 m (TD, 1280‒1360 m) (ICML-EMU-12870-C). TALUD IV, St. 7 (22°00’22”N, 106°49’18”W), August 23, 2000, 2M, 7F, MN from surface to 500 m (TD, 1970 m) (ICML-EMU-12871-A); 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-12871-B); St. 22 (24°17’20”N, 108°50’30”W), August 26, 2000, 1F, MN from surface to 1325 m (TD, ca. 1800 m) (ICML-EMU- 12871-C). TALUD V. St. 5 (22°00’57”N, 106°40’00”W), December 13, 2000, 1M, 15F, MN from surface to ca. 1400 m (TD> 1600 m) (ICML-EMU-12872); St. 29 (25°14’36”N, 109°24’15”W), December 17, 2000, 4M, 1F, MN from surface to 1290 m (TD, 2040 m) (ECO-CH-Z-10541). TALUD VI. St. 7 (22°21’39”N, 107°01’42”W), March 14, 2001, 1M, 5F, MN from surface to 1305 m (TD, 2100 m) (ICML-EMU-12873-A); St. 22 (24°17’34”N, 108°50’25”W), March 15, 2001, 1F, MN from surface to 1410 m (TD, 1760 m) (ICML-EMU-12871-B). TALUD XI. St. 6A (16°58’00”N, 100°57’00”W), June 7, 2007, 1M, 1F, MN from surface to 1400 m (TD, 1960 m) (ICML- EMU-12874-A); St. 19B (17°56’00”N, 103°10’00”W), June 9, 2007, 2M, 1F, MN from surface to 1490 m (TD, 1750 m) (ICML-EMU-12874-B). TALUD XII. St. 4 (16°59’39”N, 100°58’07”W), March 28, 2008, 1M, MN from surface to 1200 m (TD, 1995 m) (ICML-EMU-12875-A); St. 15C (17°27’51”N, 102°10’43”W), March 31, 2008, 1M, 2F, MN from surface to 1530 m (TD, 1880 m) (ICML-EMU-12875-B) .

Distribution. Circumoceanic, in warm waters of the Atlantic (south of 43°N), Pacific (South China Sea, Kuroshio Current, tropical eastern Pacific), and Indian (Bay of Bengal) Oceans; Mediterranean Sea; in the 200-300 m layer, often in surface layer (0-50 m) ( Siegel-Causey 1982, Vinogradov et al. 1996). Off Australia ( Zeidler 1998). In the eastern Pacific from off the west coast of Baja California, and from 28°30’N, in the Gulf of California, to off Gorgona Island, Colombia ( García Madrigal 2007, Lavaniegos & Hereu 2009, Valencia & Giraldo 2012).

Remarks. Siegel-Causey (1982) reported this species as relatively common in the Gulf of California. In the Mexican tropical Pacific it is relatively frequent and abundant ( Gasca et al., 2012). It has been reported in association with the siphonophore Agalma elegans (Sars, 1846) ( Harbison et al. 1977) .

Figures

FIGURE 1. Localities where Amphithyrus bispinosus was captured during this survey.