Genus Urobenus Benham, 1886

Urobenus Benham, 1886: 82; 1890: 255. — Beddard 1895: 661. — Righi 1985: 247.

Anteus – Rosa 1896: 90.

Rhinodrilus – Michaelsen 1900: 430, 1918: 165. — Stephenson 1930: 894. — Cordero 1945: 8. — Righi 1971: 10. — Jamieson 1971: 738.

Rhinodrilus (Rhinodrilus) – Cognetti de Martiis 1906: 174.

TYPE SPECIES. — Urobenus brasiliensis Benham, 1886 .

DIAGNOSIS. — Setae arranged in eight regular longitudinal lines. One pair of intra-clitellar male pores. Gizzard in VI. Three pairs of calciferous glands in VII-IX, those of VII and VIII wholly or mostly of tubular-paniculated structure, those of IX saccular, with thin wall and wide cavity endowed with irregular and sparse folds. Hearts in VII-XI. Genital apparatus holandric and metagynous. Seminal vesicles short. spermathecae in pre-testicular segments. Ovaries in XIII (Righi 1985).

DISTRIBUTION. — Urobenus comprises seven valid species (not including the new species described here) distributed in Brazil (6 species) and Venezuela (one species), with Urobenus brasiliensis (Benham, 1886) also reported from Paraguay (http://taxo.drilobase.org/; Righi 1985; Misirlioğlu et al. 2023; Brown et al. 2023).