On a new species of Amphilochus from deep and cold Atlanic waters, with a note on the genus Amphilochopsis (Amphipoda, Gammaridea, Amphilochidae)

Abstract

<i>Amphilochus manudens</i> and <i>Amphilochopsis hamatus</i> are redescribed based on specimens from the BioIce, Mareano, and IceAGE programmes. Te new species <i>Amphilochus anoculus</i> <b>sp. n.</b> is described based on material from the IceAGE programme and the preceding BioIce programme; it is separated from the closely related <i>Amphilochus manudens</i> 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. Tere are also clear diferences in depth and temperature ranges. <i>Amphilochopsis hamatus</i> is shown to be closely related to <i>Amphilochus manudens</i> and <i>A. anoculus</i> and transferred to <i>Amphilochus</i>s. str.