Scina marginata ( Bovallius, 1885 )

Gasca, Rebeca & Hendrickx, Michel E., 2020, Species of Scina Prestandrea, 1833 (Amphipoda, Hyperiidea, Scinidae) from western Mexico with the description of a new species from the Gulf of California, Zootaxa 4803 (2), pp. 329-344 : 333

Scina marginata ( Bovallius, 1885)

Tyro marginata Bovallius, 1885: 15 .

Scina marginata .- Siegel-Causey, 1992: 85; Vinogradov et al., 1996: 164, fig. 60; Brusca & Hendrickx, 2005: 148 (list); García- Madrigal, 2007: 137 (list); Zeidler & de Broyer, 2009: 19 (list) (complete synonymy).

Material examined. 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-12460A) . TALUD IV, St. 15 (23°23’30”N, 107°47’48”W), August 24, 2000 , 2F, MN from surface to 1500 m ( TD, 2350 m) (ECO-CH-Z-10307) . TALUD V, St. 5 (22°00’57”N, 106°40’00”W), December 13, 2000 , 4M, 3F, MN from surface to ca. 1400 m ( TD > 1600 m) ( ICML-EMU12460 B); St. 29 (25°14’36”N, 109°24’15”W), December 17, 2000 , 1F, MN from surface to 1290 m ( TD, 2040 m) (ECO-CH-Z-10308) . TALUD XI, St. 6A (16°58’00”N, 100°57’00”W), June 7, 2007 , 1F, MN from surface to 1400 m ( TD, 1960 m) (ICML-EMU- 12461A) . TALUD XII, 28B (18°56’00”N, 104°59’57”W), April 2, 2008 , 1F, MN from surface to 1425 m ( TD, 2041 m) (ICML-EMU-12461B) .

Eastern Pacific and worldwide distribution. Known only from the southern Gulf of California, between the Bay of La Paz and 23°45’N, 107°35’W ( Brusca & Hendrickx 2005). From 25°14’36”N to 16°58’00”N in western Mexico (this study). Cosmopolitan in warm water in the Mediterranean Sea, the Atlantic, the Pacific and the Indian Oceans ( García-Madrigal 2007).

Remarks. Scina marginata appears to be much more abundant in the eastern tropical Pacific than previously thought, with several records in the southern Gulf of California, and off SW Mexico (present study) ( Fig. 3 ). This species is relatively easy to distinguish by features such as the distal extension of propodus of both pereopod 1 and pereopod 2, the wide pereopod 7 segments, and the falcate claws of pereopods 5–7 dactylus. The specimens show conspicuous setae on the anterodistal portion of pereopod 7.

Figures

FIGURE 3. Localities where Scina marginata (Bovallius, 1885) was captured during this survey.