Psilotreta daidalos Malicky, 2000

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 : 3-4

Psilotreta daidalos Malicky, 2000

Fig. 1

Diagnosis

The male genitalia of this species resemble those of P. trispinosa Schmid, 1965 , but can be distinguished by the following characters: (1) intermediate appendages are single (intermediate appendages of P. trispinosa are trifid); (2) each lateral process of segment X acute apically (in P. trispinosa , lateral process of segment X round apically); (3) parameres are short, approximately half as long as aedeagus (parameres of P. trispinosa about as long as aedeagus).

Material examined

CHINA – Anhui Province • 1 ♂; Yuexi County, Yao-luo-ping Nature Preserve, close to the #28 Red Army’s historic sites; 30°59'10.66" N, 116°5'53.26" E; 1141 m a.s.l.; 9 May 2015; Qiu Shuang and Liu Tian-yu leg.; light sheet trap; NAU . – Hubei Province • 2 ♂♂; Huangmei County, Nuo-bu-yuan, close to Lao-zu Temple ; 30°13'48.87" N, 115°49'53.60" E; 919 m a.s.l.; 24 Jun. 2015; Qiu Shuang and Liu Tian-yu 1eg.; light sheet trap; HUST .

Description

Male

HEAD. In anterior view, frons with groove located between antennae; frontogenal compact setal warts oblanceolate, adjacent to compound eyes; anterior tentorial pits located close to clypeus, with clypeogenal vertical grooves located ventrally; row of short scratches located dorsally of anterior tentorial pits ( Fig. 1A ). In dorsal view, vertexal mediantennal compact setal warts semicircular; vertexal lateroantennal compact setal warts subtriangular, posterior ends proximal to occipital setal warts; occipital setal warts large, touched with each other in center of head, slightly concave at anterior margin; postgenal setal warts small, slender ( Fig. 1B ). Maxillary palp segment length ratio 1:1.1:1.8:1.7:2.5 ( Fig. 1C ).

WINGS. Forewings each 7.4–8.0 mm (n = 2), yellow, discoidal cell (DC) present, fork I is approximately one third longer than fork II; R 4+5 not fused with R 3, Cu 2 absent; row of setae located in close proximity to posterior margin of each forewing. Hind wings each present with Sc close to R1 mid-span, DC present ( Fig. 1D ).

MALE GENITALIA. Tergum IX broad in lateral view ( Fig. 1E ), triangular in dorsal view ( Fig. 1F ); sternum IX broad in lateral and ventral views ( Fig. 1E, 1G ). Median dorsal process of segment X oblanceolate ( Fig. 1F ); lateral process highly modified ( Fig. 1I ), with sharp process anteriorly, sub-triangular process and thin long lateral branch posteriorly in lateral view. Intermediate appendage present, short and strongly hooked ( Fig. 1I ). Superior appendage digitate in dorsal and lateral views ( Fig. 1 E–1F). Coxopodites with bases wider than apices in lateral view ( Fig. 1E ), rectangular in ventral view ( Fig. 1G ); harpagones each coniform, with numerous small round spines spread at apex ( Fig. 1G ). Phallotheca strongly sclerotized, slightly curved ventrad, truncated at apex in lateral view ( Fig. 1H ); parameres present, basal half humped dorsally in lateral view, apex acute, in ventral view curved mesad at bases and curved laterad at apex ( Fig. 1J ); aedeagus slightly sclerotized at base, apex membranous, with small hump in lateral view and pair of lobes in ventral view ( Fig. 1H, 1K ); ventral sclerite of aedeagus curved at base, and expanded at apex in lateral view ( Fig. 1H ), pandurate in ventral view ( Fig. 1K ).

Comments

Compared with Malicky’s (2000) descriptions and illustrations, the specimens in Henan Province have the intermediate appendages more strongly curved than those in Anhui and Hubei Provinces. The ventral sclerite of the aedeagus of specimens from Henan Province is slender, not pandurate as we described. The shapes of other structures are similar.

Distribution

The type locality of this species is in Henan Province ( Malicky 2000), now we report it from Anhui and Hubei Provinces.

Figures

Fig. 1. Psilotreta daidalos Malicky 2000. 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, ventral view. K. Aedeagus, ventral view. Scale bars: A–C = 200 µm; D = 1 mm; E–K = 250 µm.