Subgenus Triamyia Dyar, 1919
Wyeomyia aporonoma Dyar & Knab, 1906.
Subfamily Culicinae, genus Wyeomyia. Subgenus Triamyia includes two species. Subgenus abbreviation – Tra.
ADULTS ‒ Proboscis short, expanded distally; mesopostnotal setae present, scales absent; paratergite without scales; lower mesokatepisternal setae extending above dorsal margin of mesomeron; upper calypter of wing without marginal setae. MALE GENITALIA ‒ Tergum VIII without posterolateral lobes; tergum IX lobes weakly developed, with strongly developed setae; gonocoxite long, tapered and curved distally, with tergal triad; gonostylus long, slender, curved, lobes not well developed; aedeagus longer than wide, apical tergal arms fused (forming an apical tergal bridge); proctiger normal, apex with 4 or 5 teeth, cercal setae present. LARVAE ‒ Setae 4‒6-C single, widely separated, 5-C inserted posterior to seta 7-C, 6-C inserted anterior to seta 7-C; seta 1-A single, hair-like, inserted on distal half of antenna; seta 3-Mx of maxilla not borne in lateral cup-like notch, seta 4-Mx single, truncate, seta 6-Mx branched; seta 14-C strongly developed, significantly longer than seta 15-C, inserted anterior to seta 15-C; seta 1-P with few branches, inserted mesal to and shorter than setae 2,3-P; seta 4-P long, multi-branched; seta 11-P,M,T single, short, hair-like; seta 7-M weakly developed, branched, similar to seta 1-M; seta 13-T strongly developed, multi-branched, about as long as thorax; seta 1-I,II relatively large, much longer than seta 2-I,II, seta 1-III‒VI usually double or triple, longer than segment; seta 2-I‒VII short, usually single, 2-II‒VII inserted anteromesal to seta 1; seta 9-I‒VI short, single or double; seta 13-I‒VI branched, 13-I inserted anterior to other ventral setae, 13-II‒VI inserted mesad to seta 12; comb plate absent, comb scales in single or partially double row, dorsal scales spine-like, ventral scales short, broad, fringed distally; siphon without pecten, seta 1-S inserted on proximal third of siphon, setae la,2a-S each in more or less straight row, each with 3 setae, 1a-S single or branched, 2a-S single; saddle without posterolateral spicules; seta 4-X branched, very short, about as long as saddle. PUPAE ‒ Cephalothorax and abdomen without spots; seta 1-I well developed, dendritic; seta 2-II inserted lateral to seta 1, 2-III‒VII inserted mesal to seta 1; seta 3-II,III,VII inserted lateral to seta 1, 3-IV inserted anterolateral to seta 1, 3-V,VI inserted anteromesal to seta 1; seta 6-II single, about as long as tergum III, 6-VII inserted on tergum posterior to seta 9-VII; paddle large, broad, about twice as long as tergum VIII, apex with minute spicules. See genus Wyeomyia.
Triamyia was recovered as a monophyletic clade in the phylogenetic study of Motta et al. (2007) based on morphological data. Although the analysis of morphological data alone did not reveal close affinities with other subgenera, Wy. aporonoma, in the absence of Wy. staminifera, was recovered in a sister relationship with Wy. melanocephala (subgenus uncertain) + Onirion personatum when the morphological data were combined with available allozyme data.
The immature stages of species of Triamyia are most often found in bamboo and tree-hole habitats. Larvae of Wy aporonoma have also been found in a hole in a fence post, a hollow in a banana stump, and in coconut and cacao shells (Dyar & Knab, 1906; Belkin & Heinemann, 1976; Heinemann & Belkin, 1977; Lourenço-de-Oliveira et al., 1992). Females of Wy. aporonoma are known to land on and bite humans during the daytime (Belkin & Heinemann, 1976; Heinemann & Belkin, 1977).
Wyeomyia aporonoma is widely distributed from Argentina northward into Central America as far as Mexico. It is recorded from the following countries: Argentina, Belize, Bolivia, Brazil, Colombia, Costa Rica, El Salvador, French Guiana, Grenada, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Suriname, Trinidad and Tobago, and Venezuela. Wyeomyia staminifera is only know from Brazil.
Motta et al., 2007 (subgeneric status, morphology, phylogenetic relationships).
aporonoma Dyar & Knab, 1906
staminifera Lourenço-de-Oliveira, Motta & de Castro, 1992
