GUSANA E.M. FROEHLICH, 1978

Ty p e s p e c i e s: G e o p l a n a c r u c i a t a G r a f f, 1 8 9 9, designated by E. M. Froehlich (1978).

New diagnosis: Gusanini with body colour pattern with cross-banding; creeping sole broad, with more than half the body width. Sensory border wide, around the anterior tip. Cutaneous musculature thickness relative to body height at the pre-pharyngeal region ranges between 16 and 24%. Testes dorsally located. Male atrium large. Penis papilla of small intra-antral type. Female canal enters ventrally. Without adhesive musculoglandular organs and sensory papillae. Copulatory apparatus without adenodactyls.

Distribution: As for that of the tribe.

Remarks on Gusanini: This monogeneric tribe includes six species of Gusana (Almeida et al., 2022) . This genus was recovered as a clade in Geoplaninae by Almeida et al. (2022), and also in this paper. Gusana was erected by E. M. Froehlich (1978) and re-diagnosed by Ogren & Kawakatusu (1990) and Almeida et al. (2022). The tribe is diagnosed herein by a set of diagnostic features of Gusana herein elevated to the tribe level. Therefore, the diagnosis of Gusana is shortened.