Culicidae
Creators: name: Rueda, Leopoldo M.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Culicidae

description: Key for the Identification of Fourth Stage Mosquito Larvae Associated with Dengue Virus Transmission in the South Pacific Islands and Australian Region 1. Head. Seta 1 ­C stout and usually strongly hooked (Fig. 65); seta 4 ­C usually caudad to seta 6 ­C (Fig. 66). Abdomen. Siphon with acus (Fig. 67); comb scales more than 20, not in a single row, and each scale usually spatulate, fringed with short spinules (Fig. 68); ventral brush (4 ­X) with 6 pairs of setae (Fig. 69)...................................... <i>............................................................................ Ochlerotatus (Finlaya) notoscriptus</i> Head. Seta 1 ­C not stout (Fig. 70); seta 4 ­C usually cephalad to seta 6 ­C (Fig. 71). Abdomen. Siphon without acus (Fig. 72); comb scales less than 20, in a single row, and each scale not spatulate (Fig. 73); ventral brush (4 ­X) with 4–5 pairs of setae (Fig. 74) <i>....................................................................................................................</i> 2 <b>FIGURE 67.</b> <i>Ochlerotatus (Finlaya) notoscriptus.</i> <b>FIGURE 72.</b> Aedes (Stegomyia) aegypti. 2 (1). Abdomen. Comb scales with stout, subapical spines or with multiple stout spines (Fig. 75)................................................................................................................... 3 Abdomen. Comb scales without subapical spines or multiple stout spines (Fig. 76) 4 3 (2). Abdomen. Anal segment, X, without strong marginal spicules (Fig. 77); saddle incomplete (Fig. 78); seta 1 ­X about 0.7 saddle length (Fig. 79); ventral brush (4 ­X) with 5 pairs of setae (Fig. 80) <i>............................................ Aedes(Stegomyia) aegypti</i> Abdomen. Anal segment, X, with short, strong marginal spicules (Fig. 81); saddle complete (Fig. 82); seta 1 ­X about 1.5 saddle length (Fig. 83); ventral brush (4 ­X) with 4 pairs of setae (Fig. 84) <i>......................................... Aedes (Stegomyia) rotumae</i> 4 (2). Abdomen. Saddle complete (Fig. 85)....................................................................... 5 Abdomen. Saddle incomplete (Fig. 86).................................................................... 6 5 (4). Head. Seta 6 ­C double (Fig. 87). Thorax. Seta 5 ­M usually double (Fig. 88)............ <i>............................................................................................... Aedes (Stegomyia) cooki</i> Head. Seta 6 ­C single (Fig. 89). Thorax. Seta 5 ­M usually single (Fig. 90).............. <i>.................................................................................. Aedes (Stegomyia) polynesiensis</i> FIGURE 90. 6 (4). Head. Seta 6 ­C usually double (Fig. 91). Abdomen. Seta 4 ­d X single (Fig. 92)...... <i>....................................................................................... Aedes (Stegomyia) albopictus</i> Head. Seta 6 ­C single (Fig. 93). Abdomen. Seta 4 ­d X double (Fig. 94) …............ 7 FIGURE 93. FIGURE 92. 7 (6). Abdomen. Anal segment, X, with short, strong marginal spicules (Fig. 95)............. <i>....................................................................................... Aedes (Stegomyia) scutellaris</i> Abdomen. Anal segment, X, without strong marginal spicules (Fig. 96) …............. 8 8 (6). Abdomen. Seta 4 ­c X usually single (Fig. 97)................. <i>Aedes (Stegomyia) hensilli</i> Abdomen. Seta 4 ­c X double (Fig. 98)....................... <i>Aedes (Stegomyia) hebrideus</i> Explanation of Notes a <i>Ochlerotatus notoscriptus</i> adult has a small group of white scales at the lower caudal portion of the patch of dark scales on the pronotum. The prescutal lateral white line is always connected to posterior dorsocentral white line. There is a strongly developed patch of white scales in front of the wing root. The adults exhibit individual morphological variations in ornamentation. In New Zealand and Australia, adults have the scutum with light yellowish scales and well­developed dorsocentral anterior pale line. In New Caledonia, adults have the scutum with white scales and poorly developed anterior dorsocentral pale line. b <i>Aedes aegypti</i>, the yellow fever mosquito, has a pair of white patches on the clypeus. The mesepimeron has separate white scale patches and the anterior portion of midfemur has a longitudinal white stripe. c <i>Aedes albopictus</i>, the Asian tiger mosquito, can be distinguished from related species by the presence of broad flat white scales on the lateral margin of the scutum just before the level of wing root; other species (e.g. <i>Aedes pseudoscutellaris</i>) has only narrow curved white scales in this position. When scutal markings are rubbed off, <i>Ae. aegypti</i> can easily be misidentified as <i>Ae</i>. <i>albopictus.</i> It can be distinguished by having separated white scale patches on the mesepimeron whereas they are connected in <i>Ae</i>. <i>albopictus</i>. The anterior portion of the midfemur has no longitudinal white stripe in <i>Ae. albopictus.</i> d <i>Aedes rotumae</i> adults resemble <i>Ae.</i> <i>upolensis</i> Marks in the complete absence of a lower mesepimeral white scale patch, or with a very few mesipemeral white scales. <i>Aedes rotumae</i> can be distinguished from <i>Ae. upolensis</i> by having hindtarsomere 4 with basal 0.75 or more white. <i>Aedes upolensis</i> has hindtarsomere 4 with basal 0.60–0.70 white. e <i>Aedes hensilli</i> can be distinguished from <i>Ae. hakanssoni</i> Knight and Hurlbut by the presence of white scale patches on all scutellar lobes, and usually with a few apical dark scales on midlobe. The hindfemur of <i>Ae. henselli</i> has white markings on the anterior surface tapering towards apex, and its hind tarsomere 5 is not entirely dark (only distal one­half dark). The hindfemur of <i>Ae. hakanssoni</i> has white markings on the anterior surface sloping off ventrally towards apex, and its hindtarsomere 5 is entirely dark. f <i>Aedes scutellaris</i> cannot be distinguished from <i>Ae. hebrideus</i> by using female adult morphological characters. Males of both species, however, can be separated morphologically. The male genitalia of <i>Ae. scutellaris</i> has a claspette with specialized setae at most two­thirds as long as the largest tergal setae whereas the claspette setae are at least as long as the largest tergal setae in <i>Ae. hebrideus</i>. g <i>Aedes cooki</i> has abdominal terga with incomplete subbasal white bands while <i>Ae. polynesiensis</i> has abdominal terga usually without subbasal white bands, but with subbasal white lateral patches.
description: Published as part of <i>Leopoldo M. Rueda, 2004, Pictorial keys for the identification of mosquitoes (Diptera: Culicidae) associated with Dengue Virus Transmission, pp. 1-60 in Zootaxa 589</i> on pages 33-40, DOI: 10.5281/zenodo.169153