Psilotreta furcata, Qiu & Yan, 2020

Qiu, Shuang & Yan, Yun-jun, 2020, The Psilotreta Banks, 1899 of the Dabie Mountains, east central China, with descriptions of two new species (Insecta: Trichoptera: Odontoceridae), European Journal of Taxonomy 601, pp. 1-11 : 6-8

Psilotreta furcata sp. nov.

urn:lsid:zoobank.org:act:445EFA06-FF9A-4775-BAC8-61F93D4C1482

Fig. 2

Diagnosis

The male genitalia of this new species resemble those of P. quinlani Kimmins, 1964 , but can be distinguished by the following characters: (1) the median dorsal process of segment X is more than 3 × as long as wide in dorsal view (short in P. quinlani , about as long as wide in dorsal view); (2) ventral branch of lateral process of segment X is simple and slender, directly pointed posteriorly in lateral view (in P. quinlani , ventral branch of lateral process of segment X is more complicated, directed ventrally and reduced to a digitate projection curving posteriorly in lateral view); and (3) superior appendages each round at apex in lateral view (superior appendages of P. quinlani each triangular at apex in lateral view).

Etymology

The specific name is derived from the Latin ‘furcata’, or English ‘furcate’, referring to the forked median dorsal process of segment X.

Material examined

Holotype

CHINA – Hubei Province • ♂; Yingshan County, Tao-hua-chong; 30°59'33.31" N 115°59'45.87" E; 469 m a.s.l.; 6 May 2015; Qiu Shuang and Liu Tian-yu 1eg.; light sheet trap; NAU.

Paratype

CHINA – Hubei Province • 1 ♂; same collection data as for holotype; HUST .

Description

Male

HEAD. In anterior view, frons located with pit between antennae, with short dark line extended below pit. Frontogenal compact setal warts slender, in close proximity to compound eyes laterally, and next to pair of wide grooves mesally ( Fig. 2A ). In dorsal view, with dark median dorsal line dissipating before reaching posterior margin, vertexal mediantennal compact setal warts proximal to each other, and smaller than vertexal lateroantennal compact setal warts. Occipital setal warts round, postgenal setal warts digitate. Antennae present with tube-like structure within ( Fig. 2B ). Maxillary palp segments length ratio 1:0.9:1.7:1.5:1.8 ( Fig. 2C ).

WINGS. Forewings each 8.9–9.2 mm (n = 2), yellow, round at apex; DC present, fork I about ⅓ longer than fork II, R 4+5 not fused with R 3, Cu 2 absent; row of setae located close to posterior margin of each forewing. Hind wings with R1 straight, Sc and R2 slightly curved at crossvein Sc-r and r separated, DC absent ( Fig. 2D ).

MALE GENITALIA. Tergum IX triangular in dorsal view ( Fig. 2F ), narrow in lateral view ( Fig. 2E ). Sternum IX wide in lateral and ventral views ( Fig. 2E ). Main body of segment X hexagonal in dorsal view ( Fig. 2F ); median dorsal process of segment X narrow in lateral view ( Fig. 2E ), V-shaped in dorsal view ( Fig. 2F ), about 3 × as long as wide; ventral branch of lateral process of segment X narrow, slightly curved in lateral view ( Fig. 2I ), curved mesad at apex in dorsal view ( Fig. 2F ). Intermediate appendage small, with two sharp tips dorsally ( Fig. 2I ). Superior appendages digitate in lateral view ( Fig. 2E ), narrower basally than apically in dorsal view ( Fig. 2F ). Coxopodites thick, slightly narrowed at bases in lateral view ( Fig. 2E ), curved laterad in ventral view ( Fig. 2G ); harpagones about ⅓ as long as coxopodites, apices round, with short round spines ( Fig. 2G ). Phallotheca slightly sclerotized, with apex truncate in lateral view ( Fig. 2H ); parameres long, slightly curved mesally at apices in posterior view ( Fig. 2J ); aedeagus slightly sclerotized ventrally; ventral sclerite of aedeagus narrow, curved at about 90 degrees in lateral view ( Fig. 2H ) and spatulate in dorsal view ( Fig. 2K ).

Distribution

The type location is in the Hubei Province, but the distributions is otherwise unknown.

Figures

Fig. 2. Psilotreta furcata sp.nov. A. Head, anterior view. B. Head, dorsal view. C. Maxillary palp. D. Wing veins. E. Male genitalia, left lateral view. F. Male genitalia, dorsal view. G. Male genitalia, ventral view. H. Phallus, left lateral view. I. Segment X, left lateral view. J. Parameres, posterior view. K. Aedeagus, dorsal view. Scale bars: A–C = 200 µm; D = 1 mm; E–K = 250 µm.