Corynoneurella Brundin

Corynoneurella Brundin Corynoneurella Brundin, 1949: 830; Langton 1997: 20. Corynoneura Winnertz, pro parte, Schlee 1968: 48.Published as part of Fu, Yue, Hestenes, Tor Christian & Saether, Ole, 2010, Review of Afrotropical Thienemanniella Kieffer (Diptera: Chironomidae: Orthocladiinae), pp. 1-22 in Zootaxa 2338 on page 2, DOI: 10.5281/zenodo.19323

Corynoneurella afra Lehmann, comb. n.

Corynoneurella afra (Lehmann) comb. n. Thienemanniella afra Lehmann, 1981: 22, Harrison 1992: 193 [Key]. Material examined. DEMOCRATIC REPUBLIC OF THE CONGO: Kisangani, Sisimi-Bach, 13, J. Lehmann, 1975 (ZSM). Kisangani, Kies Yevll Sajd, 1 3, 11. iv. 1975, J. Lehmann, (ZSM). Diagnostic characters. The adult male has an antenna with flagellomeres 1–8 subrectangular in shape, while segments 9–11 are smaller and rounded. Antenna with 12 flagellomeres, apex rounded, AR about 0.25. Eyes bare, head with two postorbitals. Superior volsella not fused, inferior volsella small, caudally situated and well separated from superior volsella. Hind tibia with simple spur and smaller seta. Tergite I with 1 setae to each side. The pupa is 1.27 mm long; wing sheath without pearls; no taeniate L-setae on tergite I–III, tergites III–VI with very thick shagreen anteriorly and getting fewer posteriorly. Male imago, as in Lehmann (1981) with the following additions (n = 1–2). Total length 1.28–1.30 mm. Wing length 0.54 mm. Total length/wing length 2.42. Wing length/profemur length 2.70. Wing width/wing length 0.48. Abdomen (Lehmann 1981 fig. 28) with tergites II–IV pale. Head. Eyes bare. AR 0.25–0.26. Antenna with flagellomeres 2–8 of about same size and form, 20–25 µm long; flagellomeres 9–11 small and rounded, 11–15 µm long. Ultimate flagellomere not broadened, with about 30 sensilla chaetica, 4–5 of basal sensilla chaetica unusually broad, apex rounded. Tentorium 106 µm long, with two basal extensions, one directed medially and one basally. Palpomere lengths (in µm): 15, 15–22, 24– 26, 36, 66–69. Palpomeres 5 / 3 2.6–2.9. Palpomere 2 and 3 elliptical, 4 slight broader and rectangular, 5 slender (Lehmann 1981 fig. 29). Sensilla clavata apparently lacking. Wing (Lehmann 1981 fig. 26). Anal lobe poorly developed. VR 1.86. An 1 /wing length 0.40. Pc/wing length 0.61. C/wing length 0.29, Cu/wing length 0.53. Costa with 7–9 uniserial marginal setae, posterior wing margin with alternating long and short setae, anterior margin with short strong setae. Legs. Fore trochanter with distinct dorsal keel. Spur of fore tibia 20–23 µm long, spurs of mid tibia 9 µm and 16 µm long, of hind tibia 20–21 µm and 14–16 µm long. Width at apex of fore tibia 15 µm, of mid tibia 18 µm, and of hind tibia (a) 26 µm. Width of hind tibia 1 / 3 from apex (d) 16 µm, elongation (b) 15 µm long, maximum thickening (c 1) 26 µm long, total length of thickening (c 2) 50 µm, a/d 1.63, b/d 0.94, c 1 /d 1.63, c 2 /d 3.10. Tarsomere 4 of legs subrectangular. Hind tibia with comb of 14 setae. Sensilla chaetica apparently lacking. Length of leg segments and their proportions as in Table 1. TABLE 1. Lengths (in µm) and proportions of legs segments of male Corynoneurella afra (Lehmann) comb. n. fe ti ta 1 ta 2 ta 3 ta 4 p 1 168–199 206–226 131–146 47–51 29–33 26 p 2 208–219 208–337 110–117 47–69 29 15–22 p 3 164–180 193–208 117 66–69 26–29 15–21 ta 5 LR BV SV BR p 1 29 0.65 2.83–2.95 3.63 1.4 p 2 29–31 0.49–0.53 3.65–4.24 3.80–3.91 1.0– 1.2 p 3 26 0.61–0.71 3.01–3.20 3.06–3.41 1.0– 1.5 Hypopygium (Lehmann 1981 fig. 27). Tergite IX with numerous small setae. Superior volsella narrow, separate plates. Inferior volsella small, placed caudally, with thin glandular setae. Phallapodeme bent, with basal projections directed both orally and caudally. Transverse sternapodeme thick, 27 µm long. Gonocoxite 73 µm long. Gonostylus 22–23 µm long. HR 3.20–3.37, HV 5.71–5.94. Pupa. Total length 1.27 mm. Exuviae pale, transparent with yellowish thorax. Cephalothorax. Frontal setae 14 µm long. Median antepronotals 21 µm and 14 µm long. Lateral antepronotals 11 µm long. PcS 1 11 µm long, PcS 2 10 µm long. PcS 1–3 not in a line; PcS 1 4 µm from PcS 2; PcS 2 6 µm from PcS 3; PcS 1 7 µm from PcS 3. Dorsocentrals Dc 1 14 µm long. Dc l located 10 µm from Dc 2, Dc 2 located 25 µm from Dc 3, Dc 3 located 10 µm from Dc 4. Wing sheath without pearls. Abdomen. Shagreen and chaetotaxy as illustrated in Lehmann (1981 fig. 35). Taeniate L-setae on tergites I–III absent; O-setae absent in all segments. Anal lobe 105 µm long. Anal lobe fringe with more than 10 shorter setae which almost transparent. Three anal macrosetae, all 131 µm long; median seta 104 µm long. Distribution. The species is known only from Kisangani Province, Democratic Republic of the Congo (Lehmann 1981). Remarks. Lehmann’s (1981) description and drawings are accurate except that the anal macrosetae of the pupae are not taeniate, but apparently cylindrical at base and narrowly taeniate closer to apex.Published as part of Fu, Yue, Hestenes, Tor Christian & Saether, Ole, 2010, Review of Afrotropical Thienemanniella Kieffer (Diptera: Chironomidae: Orthocladiinae), pp. 1-22 in Zootaxa 2338 on pages 2-3, DOI: 10.5281/zenodo.19323

Thienemanniella

Key to known Afrotropical females of Thienemanniella 1. Two outer verticals present, tergite I with a patch of 3–4 setae............................................ T. trivittata Goetghebuer - Outer verticals absent, tergite I with patch of 1–2 setae............................................................................................... 2 2. Wings narrow; VR above 1.60; hind tibia with longest spur serrated; LR 1 about 0.80,................. T. lineola Freeman - Wings wide; VR less than 1.60; hind tibia with a simple, slightly S-shaped spur; LR 1 about 0. 70... T. fuga LehmannPublished as part of Fu, Yue, Hestenes, Tor Christian & Saether, Ole, 2010, Review of Afrotropical Thienemanniella Kieffer (Diptera: Chironomidae: Orthocladiinae), pp. 1-22 in Zootaxa 2338 on page 21, DOI: 10.5281/zenodo.19323

Thienemanniella cavata Fu, Hestenes & Saether, 2010, sp. n.

Thienemanniella cavata sp. n. (Figs 2 A–G) Type material. Holotype 3, GHANA: Brong Ahafo Region, Kintampo Falls, 13. ii. 1993, NUFU-project (J. Kjaerandsen) (ZMBN type nr. 354). Diagnostic characters. The adult male is separated from all other members of the genus by having a large cavity in the gonocoxite. It has a strongly curved phallapodeme, 10 flagellomeres and only small setae on tergite IX. Etymology: From Latin cavata, meaning cavity, referring to the cavity in the gonocoxite. Adult male(n = 1) Total length 0.95 mm. Wing length 0.61 mm. Wing width/wing length 0.34. Total length/wing length 1.51. Wing length/profemur length 3.26. Coloration. Head light brown, thorax brown, tergite I–IV pale, remaining tergites brown, sternites pale. Tergite VI and VII with median pale field. Head (Fig. 2 A–C). Eyes pubescent, hair length equals height of ommatid; height of eye/height of head 0.71. Antenna (Fig. 2 B) with 10 flagellomeres. Ultimate flagellomere broader than other segments, apex rounded or notched; flagellum with apical sensilla chaetica, and 2 setae basally. AR 0.26. Tentorium, stipes and cibarial pump as in Fig. 2 C; tentorium 120 µm long, stipes 81 µm long. Palpomere lengths (in µm): 17, 20, 32, 43, 75. Palpomere 5 / 3 ratio 2.4. Palpomere 2 with 1 sensillum clavatum. Clypeus with 8 setae. Thorax (Fig. 2 D). Anapleural suture 84 µm long, s/a 0.75. Antepronotals 4; dorsocentrals 11, uniserial; prealars 3; scutellars 4. Wing (Fig. 2 E). VR 1.31. One anal vein present, An 1 /wing length 0.37, PCu/wing length 0.58, Cu/wing length 0.46, C/wing length 0.35. Costa with 10 uniserial, marginal setae. Setation on remaining wing margin as for T. trivittata. Legs. Fore trochanter with small dorsal keel. Spur of fore tibia 21 µm long, spurs of mid tibia 11 µm and 8 µm. Hind tibia (Fig. 2 F), spurs serrated, 25 µm and 12 µm long. Width at apex of fore tibia 20 µm, of mid tibia 20 µm, of hind tibia (a) 25 µm. Width of hind tibia 1 / 3 from apex (d) 18 µm, elongation (b) 7 µm long, length of maximum thickening (c 1) 25 µm, total length of thickening (c 2) 37 µm, a/d 1.39, b/d 0.39, c 1 /d 1.00, c 2 /d 1.48. Hind tibia comb with 11 setae. Sensilla chaetica lacking on legs. Ta 1 of p 3 with 1 ventral row of 14 strong, short setae, and ventrolateral row of 16 similar, but shorter setae. Ta 1 of p 2 with ventral row of 5 short, strong setae. Ta 2–4 of p 3, and ta 2–3 of p 2 with weakly mesally curved, strong seta on ventral side of apex. Lengths (in µm) and proportions of legs as in Table 3. Abdomen. Tergite I with 3 lateral setae and 1 mediolateral seta. Number of setae on tergites II–VII: 6, 6, 6, 6, 4, 4. Sternites at least with 1 seta medially on segment II–V, remaining segments damaged. fe ti ta 1 ta 2 ta 3 ta 4 ta 5 LR BV SV BR p 1 193 237 157 58 40 15 24 0.66 3.51 2.74 1.3 p 2 237 226 134 64 38 13 25 0.59 4.03 3.46 1.6 p 3 207 244 164 92 42 15 27 0.67 3.49 2.75 2.1 Distribution. The species is known from the type locality only, Kintampo Falls in Ghana. Kintampo Falls is situated just north of the dry Semi-Deciduous Fire Zone forest subtype (Hall & Swaine, 1981) and the rainfall does not exceed 1.000 mm per annum. The specimens were captured below the cascade. Here the river flows fast over rocks and stones (Kyerematen & Saether, 2000). Remarks. The large cavity on the gonocoxite is not seen in other Thienemanniella species known to us. This type of cavity on the gonocoxite is seen also in the orthoclad genera Orthocladius and Cricotopus. The morphology otherwise is clearly similar to other Thienemanniella species, the clavus, the superior volsella and genital apodemes conform to Thienemanniella. It is interesting to note that the ta 4 of all legs is not cordiform like in most of the other species in the genus, but of a more regular, square-type like in T. fuga (Lehmann 1979: Fig. 141).Published as part of Fu, Yue, Hestenes, Tor Christian & Saether, Ole, 2010, Review of Afrotropical Thienemanniella Kieffer (Diptera: Chironomidae: Orthocladiinae), pp. 1-22 in Zootaxa 2338 on pages 6-8, DOI: 10.5281/zenodo.19323

Review of Afrotropical Thienemanniella Kieffer (Diptera: Chironomidae: Orthocladiinae)

Fu, Yue, Hestenes, Tor Christian, Saether, Ole (2010): Review of Afrotropical Thienemanniella Kieffer (Diptera: Chironomidae: Orthocladiinae). Zootaxa 2338: 1-22, DOI: 10.5281/zenodo.19323