Hyperioides longipes Chevreux 1900

Hyperioides longipes Chevreux, 1900

Hyperioides longipes Chevreux, 1900: 143, plate 17; Hurley, 1956: 15; Bowman, 1973: 33; Siegel-Causey, 1982: 161 (key), 162; Vinogradov et al., 1996: 377 (key), 378, fig. 160; Zeidler, 2004: 32 (key), 34; Brusca & Hendrickx, 2005: 150 (list); García Madrigal, 2007: 149 (list); 2011: 1492 (tab. 1), 1497; Gasca et al., 2010: 933; Lavaniegos & Hereu, 2009: 142 (tab. 1), 143, 146 (tab. 2), 151 (Appendix 1); Lavaniegos, 2014: 4 (tab. 2).

Material examined. 2 M, in one locality (Fig. 2). TALUD V. St. 5 (22°00’57”N, 106°40’00”W), December 13, 2000, 2M, MN, from surface to ca 1400 m (TD> 1600 m) (ICML-EMU-12778).

Distribution. Atlantic, Pacific, Indian Oceans, and Mediterranean Sea (Vinogradov et al. 1996). In the eastern Pacific from the Columbia River, USA, to Baja California and off Cabo San Lucas, in the southern Gulf of California, Mexico (Brusca & Hendrickx 2005, García Madrigal 2007).

Remarks. Commonly found in the Gulf of California, particularly in the southern part (Siegel-Causey 1982). Other records in the Gulf of California are from 23°54’27”N, 111°20’21”W and 23°50’30”N, 111°15’45”W (García Madrigal, 2007). Mostly epipelagic and partly mesopelagic (surface to 200‒300 m), occasionally deeper (500‒600 m) (Vinogradov et al. 1996). According to García Madrigal (2007) this species occurs between surface and 680 m depth.

The specimens examined are partially damaged and somewhat transparent, but shows the main distinctive characteristic of the species, i.e., eyes limited to the upper part of the head, and dactyls of PV to PVII shorter than in H. sibaginis, its only known congener. Also, the 3-segmented peduncle of antennae 1 and 2 is characteristic of this species and observable in our specimen.