Hooks: 8-9; anterior teeth: 4-5; posterior teeth: 8-15.
Maximum adult body length: 11 mm; tail: 33 %.
Body flaccid; transversal musculature absent; head wide; 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. Large eyes, with T-shaped pigment spot. Seminal vesicles narrow with head and trunk; position of seminal vesicles: touching posterior fins, separated from 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; West Atlantic.