Anonyx debruyni Hoek, 1882

Based on adult male

Head. Antenna 1 shorter than antenna 2; flagellum article 1 distinctly elongate. Antenna 2 approximately half of body length; calceoli present. Large, suboval or reniform. Lateral cephalic lobes acute (margins forming acute angle, apically pointed). Mouthparts forming a quadrate bundle. Maxilliped palp 4-articulate, article 4 well developed; inner plate poorly developed, not reaching half the length of the outer plate.

Pereon. Gnathopod 1 subchelate; coxa 1 large, about as long as coxa 2, coxa 1 subrectangular, with straight anterior margin; ischium short; carpus long (length 2 to 3.9 x breadth), carpus of subequal length to propodus; propodus margins tapering, palmar margin sparsely setose; dactylus well developed. Gnathopod 2 subchelate; carpus longer than propodus; dactylus well developed. Pereopod 3 propodus with blunt, locking robust seta(e) at posterodistal corner. Pereopod 4 propodus with blunt, locking robust seta(e) at posterodistal corner. Coxa 5 equilobate; pereopod 5 basis distinctly longer than broad.

Pleon. Epimeron 1 anterodistal corner acute; 3 posterodistal corner produced, 3 posterodistal corner forming a large upturned spine. Urosomite 1 with dorsal depression, not dorsally carinate. Uropod 1 rami subequal; 2 rami subequal, 2 inner ramus with marginal constriction(s); 3 outer ramus 2-articulate, 3 outer ramus article 2 short (less than 0.25 x length of article 1), 3 rami subequal. Telson distinctly longer than broad, deeply cleft.

Female (sexually dimorphic characters)

Antenna 2 less than 40% of body length.