Aedes fluviatilis (Lutz, 1904) (in Bourroul, 1904), original combination: Culex fluviatilis.
Culex fluviatilis.Subfamily Culicinae, tribe Aedini, genus Aedes, subgenus Georgecraigius. The Horsfallius Group is monobasic.
As described for the subgenus; the following characters distinguish the Horsfallius Group from the the Georgecraigius Group; characters that diagnose the Horsfallius Group (as subgenus Horsfallius) in the phylogeny of Reinert et al. (2009) are indicated by an asterisk (*).
ADULTS – *Erect scales of head restricted to occiput; maxillary palpus of males with several to numerous setae ventrally on distal part of palpomere 3 and ventrolaterally on palpomere 4, palpomeres 3 and 4 down-turned; antealar scales dark; *prescutellar area of scutum with scales; paratergite with broad pale scales (rarely absent ?); *antepronotal scales and *postpronotal scales all narrow; *postspiracular scales absent; *postprocoxal membrane with scales; hindtarsomere 2 entirely dark-scaled; laterotergite of abdominal tergum I with broad pale scales. LARVAE – Seta 5-C multiple-branched; *seta 7-C inserted at approximately same level as seta 5-C; setae 1–3-P and 5,6-P inserted on common setal support plates; *seta 3-P longer than seta 2-P; *seta 8-P ≥1.8 length of seta 4-P; seta 4-M branched; seta 7-II short, dissimilar to seta 7-I; seta 13-III–V single; seta 1-VII long, stout, aciculate, 2-branched; *seta 3-VII single; pecten spines of siphon evenly spaced; seta 1-S inserted slightly distal to pecten. PUPAE – *Seta 1-CT considerably longer than seta 3-CT: *seta 7-CT 1.2–5.0 times as long as seta 6-CT; seta 5-II inserted lateral to seta 4-II; seta 6-II longer than seta 7-II; seta 6-III–V relatively long; 5-IV–VI very long, stout, noticeably longer than following tergum; seta 2-VI,VII inserted mesal to seta 1; seta 8-VI,VII inserted dorsally. See subgenus Georgecraigius.
In the phylogeny of Reinert et al. (2009) based on extensive morphological data, the Horsfallius Group (as subgenus Horsfallius) is sister to the Georgecraigius Group (as subgenus Georgecraigius) and this pair is sister to the Australasian subgenus Patmarksia.
The immature stages of the only species of the Horsfallius Group is usually found in rock holes, rock pools and stream pools, but they have been found on occasion in artificial containers, ground pools and tree holes. Nothing seems to have been recorded about the bionomics of the adults.
The sole species of the Horsfallius Group is not known to be of medical importance to humans.
Argentina (Misiones), Bolivia (Cochabamba), Brazil (Bahia, Goias, Minas Gerais, Para, Rio de Janeiro, Sao Paulo, Sergipe), Columbia (Boyaca, Cundinamarca, Meta), Costa Rica (Alajuela, Cartago, San Jose), Ecuador (Zamora), French Guiana (Guyane, Inini), Guyana (Essequibo), Honduras (Colon), Mexico (Veracruz), Nicaragua (Zelaya), Panama (Canal Zone, Chiriqui, Cocle, Colon, Darien, Panama), Surinam (Suriname) and Venezuela (Aragua, Distrito Federal, Territorio Amazonas).
Reinert et al., 2006, 2008, 2009 (as subgenus of genus Georgecraigius, morphology, phylogeny), Reinert, 2008 (as subgenus of genus Georgecraigius, female genitalia); Wilkerson et al., 2015 (classification).
fluviatilis (Lutz, 1904) (in Bourroul, 1904)