placiva Williston, 1888 [incertae sedis]

Figs 71, 75, 77.

Baccha placiva Williston, 1888: 269 . Type-locality: Brazil, Mato Grosso, Chapada [LT ♂ AMNH] . Lectotype ♂ here designated.

Ocyptamus placivus . Thompson et al. (1976: 25).

Hybobathus placivus . Miranda (2017: 55).

Comments. Baccha placiva Williston was described from a male and a female. A male deposited in the AMNH and labeled “Chapada” “ TYPE // No. // A.M.N.H.” [red] “S.W. Williston // Collection” “Am. Mus. Nat. Hist. // Dept. Invert. Zool. // No. 19166 ” “ Lectotype // Baccha placiva Williston // Des. G.F.G. Miranda, 2017 ” is here designated lectotype and has been so labeled. This lectotype designation is made in order to fix the concept of placiva and to ensure universal and consistent interpretation of the same.

Morphological evidence brings this species close to conjunctus Wiedemann and grata Curran. Besides the similar scutum and abdominal pattern, and the mostly hyaline wing with slightly sinuous veins R4+5 and M1, male genitalia have a more sclerotized phallus and have lateral lobes on the hypandrium, as in those two other species. The evidence is still weak to support a taxon comprising these three species; furthermore, placiva has a regular antenna when compared to the other two species.