Hooks: 9-12; anterior teeth: 2-3; posterior teeth: 1-3.
Maximum adult body length: 4 mm; tail: 34-38 %.
Body firm, opaque; 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 long; gut diverticula present. Small eyes with round pigment spot. Seminal vesicles with knob and trunk; position of seminal vesicles: touching tail fin, well separated posterior fins. Ovaries of medium length, to region of ventral ganglion; ova large and few. Adhesive papillae and adhesive organs absent; apical glands absent.
Distribution: neritic; S and E Pacific.
Remarks: found in small numbers in the South Pacific, Palao and Singapore.
Type locality: off Singapore.