Family Radiicephalidae 205tapertails Marine central and eastern Atlantic and off New Guinea

Body elongate and laterally compressed, tapering to a thin caudal filament (caudal fin with small upper lobe of four rays and long, slender lower lobe of seven rays); dorsal fin with 152-159 rays; anal fin vestigial, with seven rays; pectorals and pelvics each with up to nine rays (pelvic rays tend to be lost with development); scales along lateral line but absent on rest of body; ribs present; swim bladder well developed; brown ink sac, which discharges into the cloaca (the ink, like that of Lophotus, may serve to blind would-be predators); cloaca about one-third along total length from snout; vertebrae 114-121 (36-39 + 77-82), of equal length. Maximum length about 70 cm.

One species, Radiicephalus elongatus, known from only a few specimens (e.g., Olney, 2003).

Was this article helpful?

0 0

Post a comment