Corynoneura recta Fu, 2020

Fu, Yue, Wang, Xin-Hua, Fang, Xiang-Liang, Xiao, Yun-Li, Fu, Jun & Lin, Xiao-Long, 2020, Corynoneura Winnertz (Diptera, Chironomidae, Orthocladiinae) from Zhejiang Province, China, Zootaxa 4890 (1), pp. 83-96 : 92-93

publication ID

https://doi.org/ 10.11646/zootaxa.4890.1.4

publication LSID

lsid:zoobank.org:pub:DF8187AD-1391-4884-A33A-8B79D130DA4C

DOI

https://doi.org/10.5281/zenodo.4330082

persistent identifier

https://treatment.plazi.org/id/03A887DB-166D-FF9D-FF1F-FF1CFB63FB2E

treatment provided by

Plazi

scientific name

Corynoneura recta Fu
status

sp. nov.

Corynoneura recta Fu View in CoL , sp. n.

( Fig. 6 View FIGURE 6 )

Type material. Holotype male (NKU: A13I58), CHINA: Zhejiang Province, Hangzhou City, Changhua County, Qingliangfeng National Nature Reserve , 121°9′53″E, 30°17′49″N, a.s.l. 1100–1400 m, 12.V.2012 – 20.VI.2012, malaise trap, leg. Rui Guo. GoogleMaps

Etymology. From Latin, rectus, straight, upright, referring to the inferior volsella with a right-angled corner.

Diagnostic characters. The male imago is characterized by having an antenna with eight flagellomeres, AR 0.47; superior volsella separated, like rounded corner. Inferior volsella broad, with right-angle corner, along the inner margin of gonocoxite and placed medially.

Description. Adult male (n = 1).

Total length 1.0 mm. Wing length 0.63 mm. Total length/wing length 1.58. Wing length/profemur length 2.84.

Coloration. Head and thorax dark brown. Legs yellowish. Abdomen yellow-brown.

Head. Antenna with eight flagellomeres, AR 0.47, ultimate flagellomere 123 µm long, ultimate flagellomere slightly expanded apically, with about 10 apical sensilla chaetica ( Fig. 6D View FIGURE 6 ). Tentorium and cibarial pump as in Fig. 6B View FIGURE 6 , tentorium 125 µm long; 13 µm wide. Anterior margin of cibarial pump ( Fig. 6B View FIGURE 6 ) strongly concave. Length of palpomeres (in µm): 15; 13; 15; 20; 38. Palpomere 5/3 ratio: 2.5.

Thorax ( Fig. 6E View FIGURE 6 ). Dorsocentrals 4. Scutellum with 2 setae. Prealars 1.

Wing ( Fig. 6A View FIGURE 6 ). C 170 µm long; wing width/wing length: 0.42. Costa with 7 setae.

Legs. Fore trochanter with dorsal keel. Spurs of fore tibia 15 µm long, spur of hind tibia 13 µm long and 25 µm long. Width at apex of fore tibia 23 µm, of hind tibia (a) 18 µm. Width of hind tibia 1/3 from apex (d) 18 µm, elongation length (b) 37 µm, length of maximum thickening (c 1) 50 µm, total length of thickening (c 2) 75 µm; a/d 2.06; b/d 2.06; c 1 /d 2.78; c 2 /d 4.17. Hind tibia expanded, with comb of 18 setae, one seta near spur strongly S-shaped ( Fig. 6C View FIGURE 6 ). Lengths and proportions of legs as in Table 5.

Hypopygium ( Fig. 6 View FIGURE 6 F-H). Tergite IX and laterosternite IX without long setae. The margin of tergite IX straight, medially not curved. Superior volsella anteromedially separated, like rounded corner. Inferior volsella broad, with many glandular setae and right-angle corner, along the inner margin of gonocoxite and placed medially. Phallapodeme apical slightly curved, 38 µm long, joint with sternapodeme placed caudally. Transverse sternapodeme 15 µm wide. Small attachment point of lateral sternapodeme with phallapodeme placed and directed caudally. Gonostylus slightly curved tapering, 25 µm long, megaseta 3 µm long. HR 2.52; HV 4.0.

Remarks. The new species is similar to Corynoneura tertia Makarchenko et Makarchenko, 2010 by having antenna with 8 flagellomeres, sternapodeme curved into a U-shape, and phallapodeme low, join with sternapodeme placed caudally. The new species can be separated from the latter by the phallapodeme being slightly curved, the inferior volsella broad with a right-angled corner, while in C. tertia the phallapodeme is relatively longer and obviously curved, the inferior volsella is long and narrow as is the inner margin of the gonocoxite.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Corynoneura

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