4. Mycotretus apicalis + M. melanophthalmus

(Fig. 1B, L; character 13:1 and Fig. 5B, C) ‘flagellum head elongate, angulated anteriorly, and fusing’. The body shape slightly rounded and the penile flagellum with a triangular flagellum head suggest that these species are probably closely related. Mycotretus apicalis and M. melanophthalmus also resemble Mycotretus peruvianus (not included here) in the nearly rounded, convex body and the nearly circular plate-like mentum. According to Skelley & Powell (2018), these features are present in Mycomystes Gorham and its relationship with those Mycotretus must be checked in future works.