Stenopsyche navasi Ulmer 1926

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 : 71-73

Stenopsyche navasi Ulmer 1926

( Figs. 7–8 )

Stenopsyche navasi Ulmer 1926 , 37–38, 41, textfigs. 22–23; male; “Tien Tsuen, China, von Herrn P. P. Longinos Navás 1907 erhalten. Heimat: China (Tient Tsuen [od. Tient Tschuen] in Schantung)”; deposited in the G. Ulmer collection (Zoological Museum Hamburg). Listed from China (Bei-jing, Hu-bei, Shan-xi, Si-chuan, Tian-jin, Tibet, Wu-nan, Yun-nan, Zhe-jiang) by Yang et al. 2005, 441–460.

Male. Body length 23.5 mm. Length of each forewing 26 mm (n=2). Forewings dark brown, each with many irregular light speckles in remigium, and light punctuation in vannal area. Hind wings triangular and semitransparent.

Female. Length of each forewing 17 mm (n=1). Body yellowish brown. Female genitalia: Segment VIII strongly setose. Tergum IX subrectangular in lateral view and trapezoidal in dorsal view, fused with the basal portion of segment X dorsally, separated lateroventrally. Vulvar scale rectangular, apex subtruncate in lateral view and rounded in ventral view. The basal portion of segment X sclerotized, ventrolateral margins produced into blunt triangular processes in lateral view, in dorsal view posterior margin straight; apical portion membranous, with a pair of oval sclerites dorsolaterally, apex divided into 2 pairs of lobes, each upper lobe in lateral view with apex bulging and slightly longer than lower one. Cerci oblong in lateral view, located between the upper and lower lobes, about as long as upper lobes. Processus spermathecae irregular, elongate, consisting of tube and trough in lateral view.

Larva (5th instar). Body length 44 mm. Head: sclerotized, elongate, 5.5 mm long and 1.5 mm wide (n=2), in dorsal view tapered slightly from base to distal end. Ground color brown, with black dots scattered over whole head capsule, some of them coalesced into stripes. Eyes black, eye areas yellow. Labrum light brown, with 2 hair brushes at anterior margin. Clypeus pale, with 3 paler longitudinal lines dividing clypeus into 4 subrectangular areas. Frontoclypeal apotome brown, with dark dots arranged closely in U-shaped line near margins; middle portion with scattered small dots. Lateral and ventral surfaces of head capsule brown, with scattered irregular short stripes composed of dark dots; ventrobasal area with pair of dark brown rounded areas at each side of ventral ecdysial line. Mandibles dark brown basally and black distally, each progressively narrower from base to apex in lateral view, apex with 4 apical teeth in ventral view, only left mandible with mesal brush of stiff hairs. Mentum semicircular, apex with tongue-like process, lateral margins each with seta. Anterior ventral apotome triangular, 1/ 8th as long as ventral ecdysial line. Pair of #18 setae near posteroventral margin with each seta located at center of dark brown circular spot and anterior to base of ventral ecdysial line; distance of each seta from posteroventral margin equal to distance of that setae to ventral ecdysial line (d1:d2 = 1:1).

Thorax: Pronotum strongly sclerotized, subrectangular in dorsal view, with sinuate ventrolateral margins in lateral view, yellowish brown, with -shaped pattern of dark brown dots at mesal basodorsal half and somewhat triangular pattern of dots laterally. Elongate black spot located just above insertion of each forecoxa; anterior margin fringed with fine hairs. Foretrochantins in ventrolateral view slender, sagitate, distal 1/3rd thicker than basal 2/3rds; each episternum small, bar-shaped; each epimeron surrounding base of forecoxa posteriorly, in ventral view rectangular, with its anterior margin concave. Forelegs each with forecoxa short cylindrical, in lateral view anterior margin with 1 large acute process, longer than forecoxa; foretrochanter 2-jointed, basal joint short, distal one triangular with inner apex produced into bristled process; femur cylindrical, progressively wider from base to apex in lateral view, outer side with longitudinal carina and 3 dark brown rings above carina, inner side with longitudinal indentation; tibia and tarsus slender, progressively shorter, tarsus with row of hairs on inner side along lower margin from basal 1/5th to apex; claw curved downward with small finger-like ventral process at base. Mesonotum and metanotum membranous. Mesonotal setae arising in 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: 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: Si-chuan Province, Mian-yang, Ping-wu County, Lao-he-gou, Da-pian-gou, alt. 1703.0 m, 104°43′18″N, 32°34′43″E, 24 May 2012, light trap, collected by Xu Ji-hua & Zhang Lian-bo, 2 males, 1 female. Same except Xia-wa-fang, alt. 1176 m, 104°43′18″N, 32°34′43″E, 26 May 2012, collected by Xu Ji-hua & Zhang Lian-bo, 2 larvae.

Distributions. China (Bei-jing, Hu-bei, Shaan-xi, Shan-dong, Si-chuan, Tian-jin, Yun-nan, Tibet, Zhe-jiang), Vietnam, Laos.

Figures

FIGURE 7. Stenopsyche navasi Ulmer 1926, female genitalia. 7 A, left lateral; 7 B, dorsal; 7 C, ventral.

FIGURE 8. Stenopsyche navasi Ulmer 1926, larva. 8 A – F, head: 8 A, dorsal; 8 B, left lateral; 8 C, ventral; 8 D, labrum and clypeus, dorsal; 8 E, mandibles, mentum, and anterior ventral apotome, ventral; 8 F, left mandible, ventral; 8 G, pair of # 18 setae, posteroventral. 8 H – I, prothorax: 8 H, dorsal; 8 I, left lateral. 8 J – M, foreleg and propleuron: 8 J, left foretrochantin, episternum, and epimeron, left lateroventral; 8 K, left forecoxa, left lateral; 8 L, right tarsus and claw, right lateral. 8 M, left mesotrochanter, anterior.