Length to 7.5 mm. Very variable species (see Harbison and Madin, 1976; Vinogradov, 1990a). Body broadened, with narrower pleon, very massive eyes in female, slenderer in male. Male head with obtuse outgrowth. P I with strong subchela, posterodistal process of ART 5 rectangular with produced top, smooth margins. ART 6 of P I and II with apical projection below base of dactyl (Lycaea nasuta 1). Dactyls of P I-II extremely short to moderately long (short variant in the Atlantic Ocean). Dactyl of P II also long or short; ART 6 longer (in Atlantic specimens and some from the Indian Ocean) or shorter (in some specimens from Pacific and Indian Oceans) than posterodistal process of ART 5. P III and IV with extremely short dactyls (less than 0.2 length of ART 6). Distal ART of P VII combined more than twice as short as ART 2. Endopodite of uropod I may be fused with basipodite, or free; in UR II and III, endopodite always fused with basipodite.