Hooks: 14; anterior teeth: 4-5; posterior teeth: 4.
Maximum adult body length: 7 mm; tail: 42 %.
Body firm and muscular, opaque; transversal musculature on trunk and tail; head wide; hooks not serrated. Fin bridge absent; one pair of medium-length lateral fins both on trunk and tail; lateral fins partially rayed, very few rays, rounded. Collarette short; gut diverticula absent; eyes absent. Seminal vesicles conical; position of seminal vesicles: touching both posterior fins and tail fin. Ovaries short; ova small. Adhesive papillae and adhesive organs absent. Vestibular organs bracket-shaped; apical gland cell complex present; neck canals absent.
Remarks: one immature specimen found from about 3400 m in the Eastern North Atlantic.
Type locality: 24°34.8'N, 19°40.7'W.