New species of Eustomias (Teleostei: Stomiidae) from the western north Atlantic, with a review of the subgenus Neostomias

A new species of the deep-sea dragonfish genus Eustomias is described from 14
specimens from the western North Atlantic. This species belongs to the subgenus
Neostomias, which is defined principally by the presence of a single pectoral ray, plus
one small rudimentary ray. It is unique among members of the subgenus in having
a combination of characters that includes a short mental barbel, multiple proximal
bulbs on the barbel main stem, and a unique terminal bulb morphology. Analysis of
similar species warrants resurrection of Eustomias monodactylus, previously placed in
synonymy with Eustomias filifer. A revised key to the species of the subgenus Neostomias
is provided.