Hooks: 6-7; anterior teeth: 5-8; posterior teeth: 15-20.
Maximum adult body length: 8 mm; tail: 25-29 %.
Body firmr; transversal musculature absent; head narrow; hooks not serrated. Fin bridge absent. Anterior fins of medium length, fully rayed, rounded; posterior fins of medium length, fully rayed, rounded. Collarette short narrow; gut diverticula present. Small eyes with star-shaped pigment spot. Seminal vesicles with narrow knob and trunk; position of seminal vesicles: touching both posterior fins and tail fin. Ovaries of medium length, reaching to region of ventral ganglion; ova fairly large. Adhesive papillae and adhesive organs absent. Apical glands absent.
Distribution: neritic; Pacific, between 30° and 30°N.
Type locality: Society Islands.