Culex (Microculex) fuscatus Lane & Whitman, 1951 Culex (Microculex) fuscatus Lane & Whitman, 1951: 361 (as inimitabilis subspecies; Pe, Le). Holotype in USNM. Type locality: Rio Soberbo, Rio de Janeiro, Brazil. Lane 1953: 361 (♂, ♀, Pe, Le); (Belkin et al. 1971 (ty. info.); Xavier 1973: 159 (ty. info.); Harbach & Wilkerson 2023 (to species status). Male genitali a (Fig. 8): Tergum IX lobes developed, elongate; length 3x basal width; external margin slightly concave; internal margin slightly convex; apex with 4 or 5 simple, straight setae; setae can be distributed between apical, median and basal levels; distance between lobes 3x basal width. Gonocoxite oblong; subapical lobe with group of setae; 1 leaf-like with apical portion curved; 1 long seta on apical side. Columnar process medium-sized, with 2 apically curved setae at apex (a and b), inserted at same level; seta a shorter than seta b; ventromesal surface with group of simple, straight setae. Gonostylus narrow, elongate, curved; broad, leaf-like gonostylar claw with pointed apex.Aedeagus with lateral plate much longer than aedeagal sclerite; ventral process robust, sinuous; dorsal process less developed; dorsolateral process sinuous, pointed. Aedeagal sclerite hook-like, broad ventrally, curved at apex. Paraproct medium-sized, elongate; crown with 7 simple, curved blades. Distribution: Brazil. Material examined: 7 ♂ G. RJ-STA30; SP-BG55; SP-J/APA3; SP-EC111; SP-EC160; SP-PR24; FSP-E8779.

Published as part of Oliveira-Christe, Rafael & Marrelli, Mauro Toledo, 2025, Descriptions of the male genitalia of species of Culex (Microculex) (Diptera: Culicidae) from the Atlantic Forest, Brazil, and a dichotomous identification key for those species, pp. 517-543 in Zootaxa 5717 (4) on page 525, DOI: 10.11646/zootaxa.5717.4.3, http://zenodo.org/record/17890931