Abstract
ABSTRACT Three new amphipod species in the family Ampeliscidae, Ampelisca erythrorhabdota, Byblis robustus, and Byblis frigidis, are described from the shallow shelf waters of the northern Bering and southern Chukchi seas. Ampelisca erythrorhabdota is most closely related to Ampelisca macrocephala and differs mainly in the color patterns of unpreserved specimens and size at maturity. Byblis frigidis differs from its closest relative, Byblis breviramus, in having longer antennae, spines on both edges of article 6, pereiopod 7, and in lacking the enlarged lateral spine on the end of the peduncle of uropod 1. Byblis robustus differs from other Byblis in having antennae of almost equal length and a distinctly triangular shape of the posterior lobe of pereiopod 7.
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