Depth as a driver of evolution in the deep sea: Insights from grenadiers (Gadiformes: Macrouridae) of the genus Coryphaenoides.

•Phylogeny for the genus Coryphaenoides that represents breadth of habitat use and distribution.•Abyssal species form a monophyletic lineage that includes two non-abyssal species.•The genus may have originated in Southern/Pacific Ocean where contemporary diversity is highest.•The abyssal lineage likely arose secondarily in the S/P Ocean but diversified in the N. Atlantic.