本属は大西洋から3種知られるが,本種は鰓弁に黒色色素があることにより他種と区別できる(Marshall and Iwamoto, 1973)。 (荒井)
Distinctive characters:
(Family): Urogenital opening immediately behind anus. Usually two dorsal fins. Caudal fin absent. Scales usually armed with spinules. (Genus): Interdorsal space narrow. Second dorsal fin much higher than anal. No elongate ray on each fin. Chin barbel very short or absent. Scales not armed with spinules. (Species): Pelvic fin rays 8. Orbit diameter about 25〜35% of HL. Gill filaments on 1st arch with melanophores. Chin barbel absent. Head covered with thin membrane.
Distribution:
Atlantic.
Remarks:
Three species of this genus are known from the Atlantic, the present species is distinguishable from others by having the melanophores on gill filaments (Marshall and Iwamoto, 1973). (Arai)