Stenopsyche

Hoang, Duc Huy & Bae, Yeon Jae, 2007, Vietnamese species of Stenopsyche McLachlan (Trichoptera: Stenopsychidae), Zootaxa 1624, pp. 1-15 : 12-13

Stenopsyche sp. 2 ( Figs. 8 a–8e)

Larva. Body 35 mm, width 4 mm. Sclerites brown, with distinct punctate pattern. Head: Head ( Figs. 8 a–8c) 4.7 mm, width 1.7 mm, slightly wider posteriorly, dorsally slightly concave ventrally convex in lateral view; ground color yellowish brown, with distinct punctate pattern throughout head surfaces, with light markings around eyes; setae relatively long, moderately thick, brown. Frontoclypeus anterior margin moderately round. Labrum with yellow hair near anterior membranous margin. Mandibles brown, with apical teeth; left mandible with brush of setae in median depression. Mentum triangle, anteroposteriorly narrow; submentum yellow, with brown median process, with setae on anterior angles. Thorax: Thoracic nota oblong, yellowish brown, with distinct punctate pattern and broad black posterior margin, with median suture, with few long setae, with fringe of short slender setae on anterior margin. Prothoracic pleura brown; epimeron surrounding coxa with black median part and posterior margin. Posterior prosternite ( Fig. 8 d) anteriorly with moderate black median part extending posteriorly at both sides. Forecoxae with two large dorsal conical processes ( Fig. 8 e); basal process 0.45 mm, with seta near apex; apical process 0.45 mm, curved downward. Legs nearly equal in length, yellowish brown; femora slightly broader apically; forefemora punctate; claws bifid, hooklike. Abdomen: Abdomen almost uniformly broad, greenish grey in live specimens, light brown in alcohol, with scarce setae. Anal prolegs brown, stout, with few dark setae; claws hooklike.

Diagnosis. The larva of this species is similar to that of S. angustata Martynov in having distinctive pattern in head and median part of posterior prosternite ( Figs. 8 a–8d), but can be distinguished by the larger dorsal processes of forecoxae ( Fig. 8 e) and larger body size.

Material examined. Cao Bang Prov.: 8 larvae, Ha Quang, Soc Ha, 16 xii 2000, V.V. Nguyen; 4 larvae, Ha Quang, Phu Ngoc, 17 xii 2000, V.V. Nguyen; 8 larvae, Quang Hoa, Doc Lap, 18 xii 2000, V.V. Nguyen.

Distribution. Northern Vietnam (Cao Bang Prov.).

Figures

FIGURE 8. Stenopsyche sp. 2, larva. a: dorsal head; b: lateral head; c: ventral head; d: ventral prothorax; e: processes of right forecoxa.