Corynoneura sp. 6 (Bolton)

Fu, Yue & Saether, Ole A., 2012, 3536, Zootaxa 3536, pp. 1-61 : 46-47

Corynoneura sp. 6 (Bolton)

( Figs 23 A–F)

Corynoneura sp. 6 Bolton (2007: 30).

Material examined. USA: Ohio, Wayne County, Brown’s Lake , bog, 1 female, 1 larval and 1 pupal exuviae, 21.iv.1988, M.J. Bolton ( MJB) .

Diagnostic characters. The female has an AR of 0.44, hind tibia only slightly elongate and without S-shaped spur, gonocoxite IX with 3 setae, and coxosternapodeme with 4–5 lateral lamellae. The pupa has no taeniate Lsetae on tergite I–II, 34 taeniae in fringe of anal lob, and tergites IV–VII with only several thick hooklets. The larvae are separable by AR 0.82, mentum with three median teeth, median one smaller than the lateral median tooth, and first lateral teeth a little smaller than adjacent ones.

Female (n = 1)

Total length 2.48 mm. Wing length 0.71 mm. Wing width/wing length 0.42. Total length/wing length 3.49. Wing length/profemur length 3.3.

Coloration. Head light brown. Thorax brown with median?part yellowish. Antenna and legs yellowish, abdomen yellowish brown.

Head. AR 0.44. Lengths of flagellomeres (in µm): 35, 28, 29, 29, 53. Ultimate flagellomere with 9 sensilla chaetica. Clypeus with 7 setae. Palpomere lengths (in µm): 14, 17, 21, 29, 53. Palpomere 5/3 ratio 2.6.

Thorax. Dorsocentrals 7, prealars 2. Scutellum with 2 setae.

Wing ( Fig. 23 A). VR 2.0, two anal veins present, Cu 368 µm long, Cu/wing length 0.52, C 280 µm long, C/ wing length 0.39. Wing width/wing length 0.42. Costa with 11 setae.

Legs. Fore trochanter with keel. Spurs of fore tibia 8 µm long, of mid tibia 12 and 10 µm long, of hind tibia 32 and 15 µm long. Width at apex of fore tibia 18 µm wide, of mid tibia 19 µm, of hind tibia (a) 29 µm. Width of hind tibia 1 / 3 from apex (d) 21 µm, elongation length (b) 23 µm, length of maximum thickening (c 1) 55 µm, total length of thickening (c 2) 72 µm, a/d 1.4, b/d 1.1, c 1 /d 2.6, c 2 /d 3.4. Apex of hind tibia slightly expanded, with comb of 15 setae, without S-shaped spur. Lengths and proportions of legs as in Table 21.

Abdomen. Number of setae on tergites not visible.

Genitalia ( Figs 23 B). Tergite IX with 4 long caudal setae. Cercus 44 µm long, 26 µm wide. Notum length 79 µm. Gonocoxite with 3 long setae. Coxosternapodeme with 4–5 transparent fused lateral lamellae on inner side of coxosternapodeme. Seminal capsule 61 µm long. Neck 10 µm long, 8 µm wide.

Pupa (n = 1–2)

Total length 1.69 mm. Exuviae yellowish including cephalothorax.

Cephalothorax. Frontal setae 44 µm long. Median antepronotals 6 µm and 10 µm long. Lateral antepronotals not visible. Anterior precorneal seta (PcS 1) 14 µm long, PcS 2 17 µm long, PcS 3 21 µm long. PcS 1–3 almost in a line; PcS 1 4 µm from PcS 2; PcS 2 7 µm from PcS 3; PcS 1 11 µm from PcS 3; PcS 3 19 µm from thoracic horn. Anterior dorsocentral (Dc 1) 6 µm long; Dc 2 7 µm long; Dc 3 4 µm long; Dc 4 not visible. Dc 1 located 12 µm from Dc 2, Dc 2 located 51 µm from Dc 3. Wing sheath with 4 rows of pearls.

Abdomen ( Figs 23 C). Shagreen and chaetotaxy as illustrated. No taeniate L-setae on tergite I–II. Anal lobe 125 µm long. Anal lobe fringe with 34 setae, 360 µm long. Length of three taeniate anal macrosetae hard to measure; median setae about 61 µm long.

Larva (n = 1–2)

Coloration. Head brown. Antenna with basal segment yellowish, other segments dark brown. Abdomen yellowish.

Head. Capsule length 272 µm, width 152 µm. Postmentum 240 µm long. SII obvious, rising from small tubercle, SI and SIII not visible. Premandible 21 µm long. Mentum as in Fig. 23 E. Mandible 50 µm long. Antenna ( Fig. 23 D), AR 0.82. Lengths of flagellomeres I–IV (in µm): 160, 93, 95, 8. Basal segment width 15 µm, length of blade at apex of basal segment 44 µm. Length of antenna/length of head 1.31.

Abdomen. Length of anal setae 240 µm. Procercus 12 µm long, 10 µm wide. Subbasal seta of posterior parapods split as in Fig. 23 F, 73 µm long. Posterior parapods 97 µm long, 46 µm wide.