Himantolophus Reinhardt, 1837

Diagnosis. Himantolophus is the only genus in the family. In addition to the diagnostic features of the Himantolophidae, females and males are distinguished by the absence of the parietal bone throughout life (vs. parietal present or lost during metamorphosis in females of the gigantactinid genus Rhynchactis), and by the presence of a triradiate pelvic bone (sometimes also present in the oneirodid genus Chaenophryne) (Pietsch, 2009).