Platynectes nigerrimus (Aube, 1838)

Gustafson, Grey T., Short, Andrew E. Z. & Miller, Kelly B., 2016, New species of diving beetles in the subgenus Platynectes s. str. from the Guiana Shield (Coleoptera: Dytiscidae: Agabinae), Acta Entomologica Musei Nationalis Pragae 56 (1), pp. 79-102 : 101

Platynectes nigerrimus species group

This group is newly erected here for the Brazilian Platynectes species exhibiting a venter that is nearly entirely dark. While Brazilian specimens were not specifically examined for this study, the key and descriptions from GUÉORGUIEV (1972) allow these species to be separated from those of the P. submaculatus group and the P. agallithoplotes group by their distinctly dark venters. The species within this group are indicated in the checklist below.