Trichadenotecnum malayense New

Trichadenotecnum malayense New View in CoL

Figs. 14–17

Trichadenotecnum malayense New, 1975: 257.

Material examined. Sumatra: SE, WKNP, Kalibiru, 5°06'S 105°49'E, mixed secondary forest, 20 m, 3♂♂ 2♀♀, 2.VII.1997, ESK; WKNP, Way Kanan, 5°04'S 105°42'E, mixed secondary forest, 20 m, 2♂♂, 1.VII.1997, ESK; WKNP, Kiara tunggal, 5°06'S 105°44'E, mixed secondary forest, 100 m, 1♀, 29.XII.1995, ESK; WKNP, Kalibiru, 4°57'S 105°50'E, mixed secondary forest, 40 m, 1♀, 31.XII.1995, ESK; SW, BBSNP, North Slope of Mt Skincau, 4°53'S 104°17'E, mixed primary forest, 1500 m, 1♂ 1♀, 2.I.1996, ESK; BBSNP, Skincau, 4°52'S 104°18'E, mixed cultivated trees, 1400 m, 1♀, 2.I.1996, ESK; North, LRNP, Ketambe, 3°32'N 97°40'E, mixed secondary forest, 325–560 m, 2♀♀, 6.VI.1996, ESK (vouchers of each sex to ZMB, AMS).

Male

Colouration (c. 4 years in alcohol). Head ground colour yellowish brown. Epicranial suture dark brown, confluent brown patches each side extending to posterior margin of vertex and mesial to each orbit. Eyes black. Ocelli pale black centripetally. A narrow brown band from central ocellus toward each antennal socket. Frons with median broad brown band, lateral to this a dark brown spot. Antenna light brown. Gena unmarked. Epistomal suture dark brown. Postclypeus with distinctive dark brown striation. Basal quarter of anteclypeus dark brown, otherwise pale. Labrum and maxillary palp dark brown. Thorax predominantly dark brown with small paler areas between lobes. Fore wing with dark brown markings as figured (Fig. 14). Legs dark brown, pale between joints.

Morphology. IO:D 1.88 Fore wing venation as Fig. 14. Hypandrium (Fig. 15): symmetrical with a long, narrow, tapering spinous prong each side, closely apposed to heavily spinous lobe; central area of the hypandrium with a large field of very small setae. Phallosome (Fig. 16) a simple closed frame with short anterior projection. Epiproct (Fig. 17) rounded apically. Paraproct (Fig. 17) with basal spinous hook, apical stout sharp spine and field of about 21 trichobothria.

Dimensions. B 1.5; FW 2.1; HW 1.52; F 0.37; T 0.73; t 1 0.26; t 2 0.1; t 1 /t 2 2.6; Ct 17 (t 1) 2 (t 2); f 1 0.42; f 2 0.35; f 1 /f 2 1.2.

Remarks. This species was described from the Malay Peninsula and, although the species is also known from Java (Endang et al., 2002), Bali and Lombok (Endang & Thornton, 1992), until now the male has been unknown. The above Sumatran specimens clearly resemble the Malaysian material in having the combination of a T-shaped apex to the subgenital plate, very short ventral valve of the gonapophyses and sclerotized posterior spine on the external valve. Four males were found in association with females in Sumatran collections. Based on wing pattern, colouration, and association with females, these male specimens are clearly referable to T. malayense. In Sumatra this species was collected at altitudes ranging from 20 m to 1500 m.