Abstract
Amphilochus manudens and Amphilochopsis hamatus are redescribed based on specimens from the BioIce, Mareano, and IceAGE programmes. The new species Amphilochus anoculus sp. n. is described based on material from the IceAGE programme and the preceding BioIce programme; it is separated from the closely related Amphilochus manudens by the absence of eyes, a symmetrically bilobed labrum, four setae on the maxilla 2 outer plate, a rounded corner of epimeral plate 3, and a robust seta at the tip of the telson. There are also clear differences in depth and temperature ranges. Amphilochopsis hamatus is shown to be closely related to Amphilochus manudens and A. anoculus and transferred to Amphilochus s. str.
Highlights
The amphipod family Amphilochidae consists today of 15 genera, of which several are monotypic
This species is known from BioIce/IceAGE stations in deep and cold waters north and east of Iceland, from deep stations in the Faroe-Shetland Channel, several deep stations north in the Norwegian Sea and from one deep station in the polar basin
We have examined all Amphilochidae from the BioFar program, and only Amphilochus manudens was found
Summary
The amphipod family Amphilochidae consists today of 15 genera, of which several are monotypic. The family is cosmopolitan with the small genera seemingly restricted to specific geographic areas. The definition of Amphilochidae has been much like what Barnard and Karaman (1991) use as their diagnosis: ”Coxa 4 immensely broadened, coxae 2-4 with contiguous overlapping, not rabbeted, coxa 2 not hidden; coxa 1 very small and hidden by coxa 2.
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