Pelagic Fishes of the Genus Eustomias (Melanostomiidae) Similar to Eustomias dendriticus Regan and Trewavas with the Description of Seven New Species

Eustomias dendriticus and E. monoclonus were each described based on single small North Atlantic specimens that differed from all other species of the subgenus Dinematochirus in that the terminal bulbs of the chin barbels possess only a single laterally based pair of terminal filaments. The latter species was subsequently placed in the synonymy of the former under the assumption that differences in other barbel features were sexual or ontogenetic. Reexamination of the types of both species and of similar, more recently collected specimens indicated that E. monoclonus is distinct from E. dendriticus and revealed seven other forms that are described as