Subgenus Ctenogoeldia Edwards, 1930
Runchomyia magna (Theobald, 1905), original combination: Phoniomyia magna.
Subfamily Culicinae, genus Runchomyia. Subgenus Ctenogoeldia includes two species. Subgenus abbreviation – Cte.
Immature stages and male known only for the type species; distinguished from other members of New World Sabethini by the following combinations of characters. Characters that distinguish Ctenogoeldia from Runchomyia are indicated by an asterisk (*).
ADULTS ‒ Scales of vertex with brilliant silver and azure blue reflections; proboscis 1.20‒l .40 length of forefemur; scutal scales narrow and curved; *scutellum with scales on base of midlobe with brilliant silver reflections; postpronotum with 1 or more posterior setae; row of lower mesokatepisternal setae usually not extending dorsad to level of lower edge of mesepimeron; mid- and hindtarsi dark-scaled. MALE GENITALIA ‒ *Gonocoxite without distinctly separated basal mesa1 lobe. LARVAE ‒ Head capsule with short to long transverse slit-like occipital foramen, not bounded by distinct collar; *anterior margin of median labral plate between bases of seta 1-C concave; *mandibular spiculose area present; *maxilla with rigid apical spine shorter than articulated maxillary bundle; *anterior edge prementoligular teeth level with base of seta 1-Lh, *teeth not extending posteriorly beyond labial palpus; *seta 5-T strongly developed, moderately long; *most or all comb scales arising from single large plate; siphon with filamentous pecten; seta 3-X single; seta 6-S weakly developed, flexible, not hooked. PUPAE ‒ *Trumpet elongate, more or less cylindrical, not noticeably wider apically, apical width at least twice length of internal section; *seta 5-C much longer and stronger than seta 7-C, with 3‒10 branches; puncture present on terga III‒V; seta 5-V,VI well developed, long; *seta 6-I more or less strongly developed but weaker than seta 3-I and/or seta 6-II, seta 6-VII single or double, inserted caudomesad of seta 9-VII; caudolateral angle of tergum VIII not produced or only slightly produced, not extending more than 0.25 distance to apex of segment IX; paddle oval to triangular, inner part glabrous. See genus Runchomyia.
The phylogenetic analyses of morphological data conducted by Judd (1996) indicated that Ctenogoeldia is more closely related to genus Isostomyia than to subgenus Runchomyia ‒ the relationship supported by two unambiguous synapomorphies, both features of the larval labiohypopharynx: (1) anterior edge of the prementoligular teeth level with the bases of seta 1-Lh and (2) the teeth not extending posteriorly beyond the labial palpus.
Females of Ru. magna have been collected while biting-landing on humans between 17:00 and 18:00 in forest (Heinemann & Belkin, 1977, as Trichoprosopon magnum). Larvae have been found in the leaf axils and flower bracts of the plant genera Calathea (Marantaceae) and Heliconia (Heliconiaceae), and the leaf axils of Xanthosoma (aroids, Araceae) (Heinemann & Belkin, 1978, as Tr. magnum). Linton et al. (2013) reported the rearing of a female from a pupa collected in turbid ground seepage water in open sunlight. Circumstantial evidence suggests that the larvae may be predatory.
Species of subgenus Ctenogoeldia are not known to be of medical or economic importance.
The type species is known to occur in countries from Belize and Guatemala in Central America southward into Bolivia, with records of its occurrence in Brazil, Colombia, Costa Rica, Ecuador, Honduras, Nicaragua, Panama, Suriname and Venezuela. Runchomyia walcotti is only recorded from Brazil.
Lane, 1953 (as subgenus of Trichoprosopon); Zavortink, 1979 (subgenus as currently defined, keys to genus groups); Harbach & Peyton, 1993 (comparative morphology of larval maxillae); Judd, 1996 (morphology, phylogenetic relationships).
magna (Theobald, 1905)
walcotti (Lane & Cerqueira, 1942)
