Anonyx compactus Gurjanova, 1962

Antenna 1 shorter than antenna 2; flagellum article 1 distinctly elongate. Antenna 2 between 40 to 60% of body length; calceoli present. Eyes large, reniform. Lateral cephalic lobes subacute to acute. Maxilliped palp 4-articulate; inner plate poorly developed, not reaching half length of outer plate.

Gnathopod 1 subchelate; coxa large, about as long as coxa 2, subrectangular with concave anterior margin; ischium short; carpus long, of subequal length to propodus; propodus margins tapering, palm transverse to slightly acute. Gnathopod 2 subchelate; carpus longer than propodus; dactylus minute. Pereopods 3 and 4 propodus with blunt, locking robust setae at posterodistal corner. Pereopod 5 coxa equilobate; basis about as long as broad.

Epimeron 1 anterodistal corner producing small, up-turned spine; epimeron 3 posterodistal corner produced, forming a large upturned spine or forming 2 spines, the superior the largest (see remarks below). Urosomite 1 with dorsal depression. Uropods 1 and 2 rami subequal; uropod 2 inner ramus with marginal constriction; uropod 3 outer ramus 2-articulate, article 2 short, rami subequal with inner ramus extending past article 1 of outer ramus. Telson distinctly longer than broad, deeply cleft.

Female (sexually dimorphic characters): Antenna 2 less than 40% of body length. Calceoli absent. Epimeron 3 posterodistal corner forming a large upturned spine.