Subgenus Pseudoskusea Theobald, 1907

Type species: 

Aedes multiplex (Theobald, 1903), original combination: Skusea multiplex.

Classification: 

Subfamily Culicinae, genus Aedes. Subgenus Pseudoskusea currently includes only four species.

Characteristics: 

Species of subgenus Pseudoskusea are characterised and distinguished from other species of genus Aedes by the following combinations of characters. Characters that diagnose subgenus Pseudoskusea in the phylogenetic anal-yses of Reinert et al. (2009), based on features observed in Ae. bancroftianus and Ae. postspiraculosus, are indicat-ed by an asterisk (*).

ADULTS – Dark mosquitoes without obvious ornamentation; eyes wholly or partly separated above antennal pedi-cels, interocular scales present; vertex with broad decumbent scales, sometimes few narrow decumbent scales on occiput, erect scales numerous on occiput, sparse on vertex; antenna of males shorter than proboscis, flagellar whorls with setae mainly directed dorsally and ventrally; maxillary palpus with 5 palpomeres, palpus of females about 0.16 length of proboscis, palpus of males more or less same length as proboscis, palpomere 4 and apex of palpomere 3 slightly swollen, bearing long setae; proboscis dark-scaled, distinctly longer than forefemur; scutum with narrow dark or golden scales; acrostichal setae and dorsocentral setae moderately developed; scutellum with narrow scales on all lobes; antepronotum without scales; postpronotum with narrow scales, usually sparse, sometimes with some broad scales; upper proepisternum, subspiracular area and postspiracular area with or without scales, *lower prealar area without scales; scale-patches present on mesokatepisternum (*single large patch) and upper mesepimeron; lower mesepimeral setae and scales absent; metameron with or without short fine setae; wing]/no-lexicon] dark-scaled; tarsi dark-scaled, fore- and midungues of females equal, with or without [no-lexicon]tooth, fore- and midungues of males unequal, toothed; tergum I of abdomen with median patch of dark or pale scales, terga II–VI with either complete basal pale bands or basolateral patches with or without basomedian pale scaling; segment VIII of fe-males usually completely retracted into segment VII. FEMALE GENITALIA – Tergum VIII and sternum VIII normally without scales, tergum with 1 long basolateral seta, *sternum with seta 2-S inserted more or less directly lateral to seta 1-S; cercus long, slender, sharply rounded apically, without scales; *upper vaginal sclerite present. MALE GENITALIA – Ninth tergal lobes distinct, with setae; gonocoxite long and narrow, with basal dorsomesal patch of setae, dorsomesal apical lobe indistinct, *dorsomesal basal lobe absent; gonostylus long, simple, with long apical gonostylar claw and several long preapical setae; claspette a *single basal setose plaque, *with few incon-spicuous setae, columnar lobe absent; aedeagus simple, scoop-like; paraproct with apical spine. LARVAE – Strongly differentiated; antenna spiculate; seta 1-A branched; *labiogula wider than long; *seta 1-C single, thin, attenuate distally; *seta 4-C inserted anterior to seta 6-C; *seta 5-C ≥ 0.90 length of dorsal apotome; seta 6-C very long, single or double, *≥ 0.90 length of dorsal apotome; *seta 7-C 0.41–0.81 length of dorsal apotome; *seta 13-C branched; *2 or 3 of seta 1–3-P inserted on common setal support plate; *seta 2-T, *seta 3-I, *seta 3-II, *seta 8-II and *seta 3-VII all single; *seta 7-II developed like seta 7-I; *seta 3-VIII ≥ 0.94 length of segment X; comb of segment VIII comprised of fringed scales in large patch; siphon short or long; pecten spines evenly spaced; seta 1-S inserted beyond pecten, *≥ 2.17 width of siphon at point of attachment; *seta 9-S stout, hook-like; saddle of seg-ment X incomplete; seta 1-X single; ventral brush (seta 4-X) with 6 pairs of setae on grid. PUPAE – Not studied in detail, apparently without characters of subgeneric significance. See genus Aedes.

Phylogenetic relationships: 

The affinities of subgenus Pseudoskusea are uncertain. The group was recovered as the sister to a clade comprised of three species groups, Culicelsa + (Buvirilia + Empihals) (each as subgensus), in the phylogeny of Reinert et al. (2009) based on morphological data.

Bionomics and disease relations: 

The immature stages of three species of subgenus Pseudoskusea, Ae. bancroftianus, Ae. multiplex and Ae. postspiraculosus, are found in rain-filled ground pools; those of Ae. culiciformis are found in freshwater crab holes.

Species of subgenus Pseudoskusea are not known to be of medical or economic importance to humans.

Distribution: 

Australia and New Guinea.

Principal references: 

Dobrotworsky, 1961 (excluding australis (Erichson), taxonomy, bionomics, distributions); Dobrotworsky, 1965 (taxonomy, bionomics, distributions); Lee et al., 1984 (taxonomy, literature, distributions, bionomics); Reinert, 2002 (female genitalia); Reinert et al., 2004, 2008, 2009 (as subgenus of genus Ochlerotatus, morphology, phylogeny); Reinert et al., 2006 (as genus, morphology, phylogeny); Wilkerson et al., 2015 (status as species group); Wilkerson & Linton, 2015 (status as subgenus of Aedes).

Species: 

bancroftianus Edwards, 1921
culiciformis (Theobald, 1905)
multiplex (Theobald, 1903)
postspiraculosus Dobrotworsky, 1961

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith