Stenopsyche tienmushanensis Hwang 1957

Ji-Hua, Xu, Chang-Hai, Sun & Bei-Xin, Wang, 2015, A new species of Stenopsyche, with descriptions of larvae and females of some species associated by gene sequences (Insecta: Trichoptera), Zootaxa 4057 (1), pp. 63-78 : 74

Stenopsyche tienmushanensis Hwang 1957

( Figs. 9–10 )

Stenopsyche tienmushanensis Hwang 1957 , 382–383, figs. 42–44; male; ‟Chekiang, Tienmushan, 1935, July 14. Coll. Hwang Ke-len; Chinese Science Col. Insect Res. Inst.” (translated from Chinese). Listed from China (An-hui, Guang-xi, Guizhou, Hai-nan, Hu-nan, Jiang-xi, Shaan-xi, Zhe-jiang) by Yang et al. 2005, 441–460; belonging in the Stenophylax simplex Species Group and 1st Subgroup [ Stenopsyche dentata Subgroup ] in China (Jiang-xi, Gui-zhou, Hai-nan, Shaan-xi, Sichuan, Zhe-jiang) according to Xu et al. 2014, 223–224, figs. 1, 3a–c.

Female. Length of each forewing 20 mm (n=2). Body yellowish brown. Female genitalia: Tergum VIII in lateral view with anterodorsal angle produced forward, in dorsal view trapezoidal, distal margin subtruncate; sternum VIII trapezoidal in lateral view, strongly setose ventrolaterally, subrectangular in ventral view. Segment IX sclerotized slightly, subrectangular in lateral view, with transverse dorsal fold and with lateral apodemes extending internally anterad; in dorsal view trapezoidal. Vulvar scale located ventrally, semicircular in lateral view, with posterolateral angle strongly setose; in ventral view distal margin convex and rounded. Segment X membranous, with pair of setose longitudinal sclerites dorsolaterally oval in dorsal view and bar-shaped in lateral view, another pair of setose rounded sclerites ventrolaterally about half as long as dorsolateral sclerites; apex divided into pair of distal setose lobes, each bearing cercus. Cerci small, nipple-like. Processus spermathecae in lateral view irregular, fused with vulvar scale, in ventral view tube-like with base bulging laterally.

Larva (5th instar). Body length 29 mm. Head and pronotum highly sclerotized, with distinct dark punctate pattern. Head: Length 4 mm, width 1 mm (n=2), subrectangular in dorsal and ventral views. Setae brown and long. Ground color brown, with distinct punctate pattern as follows: Frontoclypeal apotome with dark transverse stripe along anterior margin, and 4 big dark dots connected to it; 3 dark transverse stripes connected with the dark sinuous stripe along ecdysial line, longitudinal stripe connecting with aforementioned 3 stripes; other portion of head capsule in dorsal view with scattered irregular spots; in ventral view anterior and posterior margins dark, each side of thick stripe along ventral ecdysial line with sinuous stripe composed of 3 irregular spots. Eyes black, eye areas large, pale. Labrum black mesally and pale laterally, with 2 hair brushes at anterior margin in dorsal view. Frontoclypeus pale, with brown transverse line along anterior margin. Mandibles dark brown basally and black distally in lateral view, with 4 apical teeth in ventral view, only left mandible with mesal brush of stiff hairs. Mentum brown, oval; anterior margin dark, with tongue-like process, each lateral margin with seta. Anterior ventral apotome black, triangular, about 1/11th as long as ventral ecdysial line. Pair of #18 setae near posteroventral margin located anterior to base of ventral ecdysial line; distance from each seta to posteroventral margin slightly shorter than distance of that setae to ventral ecdysial line (d1:d2 = 1:1.25).

Thorax: Pronotum heavily sclerotized, narrowly subrectangular, yellowish brown, with distinct punctate pattern as follows: mesal basodorsal half with arrow-shaped spot, laterally with dark spots forming pattern resembling “a schoolboy chasing a butterfly in a meadow,” lateral margin black. Anterior margin fringed with setae. Foretrochantins in ventrolateral view spine-like, short. Episterna in lateral view somewhat triangular, dark brown; epimera surrounding forecoxae posterolaterally, posterolateral margins black. Legs each with forecoxa short cylindrical, in lateral view anterior margin with 2 short, conical processes curved downward. Femur cylindrical, progressively wider from base to apex in lateral view, with 3 dark brown rings near upper margin; tibia and tarsus slender, progressively shorter, tarsus with row of hairs on inner side along lower margin from base to apex; claw curved downward with small finger-like ventral process at base. Mesonotum and metanotum membranous. Mesonotal setae arising from sa 1, sa 2 and sa 3, each with 1 seta. Middle and hind legs nearly equal in length, yellowish brown; femora slightly broader apically, punctate; claws bifid, hook-like.

Abdomen: Almost uniformly broad, greenish grey in live specimens, brownish in alcohol, with scarce setae. Anal prolegs brown, stout, with few dark setae; claws hook-like.

Materials examined. CHINA, Shan-xi Province, Yi-cheng County, Da-he Town, Da-he, alt. 1207.8 m, 35°27′14′′N, 111°55′56″E, 13 Sept. 2013, light trap, collected by Sun Chang-hai, Xu Ji-hua & Wang Zi-wei, 4 males, 2 females. Shan-xi Province, Qin-shui County, Xia-chuan, Nü-ying canyon, alt. 1532 m, 35°25′29′′N, 112°0′36″E, 11 Sept. 2013, collected by Sun Chang-hai, Xu Ji-hua & Wang Zi-wei, 2 larvae.

Distribution. China (An-hui, Hai-nan, Hu-bei, Jiang-xi, Shaan-xi, Shan-xi, Guang-xi, Hu-nan, Gui-zhou, Zhejiang).

Figures

FIGURE 9. Stenopsyche tienmushanensis Hwang 1957, female genitalia. 9 A, left lateral; 9 B, dorsal; 9 C, ventral.

FIGURE 10. Stenopsyche tienmushanensis Hwang 1957, larva. 10 A – G, head: 10 A, dorsal; 10 B, left lateral; 10 C, ventral; 10 D, labrum and clypeus, dorsal; 10 E, mandibles, mentum, and anterior ventral apotome, ventral; 10 F, left mandible, ventral; 10 G, pair of # 18 setae, posteroventral. 10 H – I, prothorax: 10 H, dorsal; 10 I, left lateral. 10 J – L, foreleg and propleuron: 10 J, left foretrochantin, episternum, and epimeron, left lateroventral; 10 K, left forecoxa, left lateral; 10 L, right tarsus and claw, right lateral.