Argyripnus
Argyripnus is an oceanic ray-finned fish genus in the marine hatchetfish family Sternoptychidae. They are commonly known as bristle-mouth fishes, but that may also refer to the related bristlemouth family. A. iridescens is called "pearlside", which usually refers to the closely related genus Maurolicus.
Species
There are currently seven recognized species in this genus:Argyripnus atlanticus Maul, 1952Argyripnus brocki Struhsaker, 1973 Argyripnus electronus Parin, 1992Argyripnus ephippiatus C. H. Gilbert & Cramer, 1897 Argyripnus hulleyi Quéro, Spitz & Vayne, 2009 Argyripnus iridescens McCulloch, 1926 Argyripnus pharos Harold & Lancaster, 2003Fossils of bristle-mouth fishes show that the genus was already distinct in the Late Oligocene, more than 23 million years ago.