Trichadenotecnum gombakense New & Lee

Sri Kentjonowati Endang, 2005, The Genus Trichadenotecnum (Insecta: Psocoptera: Psocidae) in Sumatra, Indonesia, With Description of Thirteen New Species, Records of the Australian Museum 57, pp. 15-38 : 22-23

Trichadenotecnum gombakense New & Lee

Figs. 7–12

Trichadenotecnum gombakensis New & Lee, 1992: 155.

Material examined. Sumatra: SW, Pekon Balak, 4°20'S 104°30'E, cinnamon, 1160 m, 1♀, 9.I.1996, ESK; West, PTP Nusantara III, Bedeng Lapan, 2°00'S 101°27'E, tea plantation, 1460 m, 1♂, 21.I.1997, ESK; West, Kresik tuo, 1°45'S 101°20'E, tea plantation, 1♂, 3♀♀, 22.I.1997, ESK (vouchers of each sex to ZMB, AMS) .

Male

Colouration (c. 4 years in alcohol) similar to female, except labrum brown and anteclypeus whitish.

Morphology. IO:D 0.58. Fore wing venation as in Fig. 7. Hypandrium (Fig. 8) asymmetrical: a row of teeth on each margin of tongue, a large toothed apical projection curved to left, a large stout spine just to left and a shorter one to right of middle of apical margin. Phallosome (Fig. 9) a closed frame with long anterior projection, posteriorly with a pair of low serrated lobes. Epiproct (Fig. 12) broad curved hook each side and a long conical projection distally. Paraproct (Fig. 11) with apical spine, long serrated basal sclerotized ridge, field of about 20 trichobothria. Posterior margin of clunium with a broad rugose lobe each side (Fig. 10).

Dimensions. B 1.5; FW 2.8; HW 1.96; F 0.45; T 0.89; t1 0.31; t2 0.08; t1/t2 3.87; Ct (t1) (t2); f1 0.44; f2 0.35; f1/f2 1.26.

Remarks. This species was described from female specimens from the Malay Peninsula by New & Lee (1992), and the male has not been recognized previously. The specimen examined is clearly similar in non-sexual characters to T. gombakense New. The heavily marked fore wing with indistinct submarginal spots resembles that of T. bidens Thornton (1961) from Hong Kong. The ventral gonapophysis valve of T. bidens is long, however, and that of T. gombakense is short. Although the sides of the subgenital plate apex are sclerotized in both species, the apical lobe in T. bidens arises from a very distinct projection or “shoulder”. Trichadenotecnum gombakense is thus distinct from T. bidens and is a probable member of Yoshizawa’s (2001) spiniserrulum group.

One male was found in association with females in recent collections. The phallosome and paraprocts resemble those of T. soekarmanni Endang et al. (2002) from central Java, but the specimen differs in details of hypandrium and male epiproct. The hypandrium of T. gombakense is similar to that of T. dolabratum Li & Yang, 1987 (placed in Loensia by Li, 2002) from China in the shape of the median tongue, but the phallosome of T. dolabratum lacks the posterior serrated lobes. Yoshizawa (2001) described T. falx from Japan, allocating it to his spiniserrulum group, and it is clearly similar to T. gombakense New in wing pattern and details of the female genitalia. Yoshizawa noted two types of wing pattern: densely spotted and sparsely spotted. The fore wing of the holotype of T. gombakense (female) is densely spotted. The male genitalic features of T. falx are clearly similar to those of the male from Sumatra. Based on the similarity of the wing pattern and its association with the female of T. gombakense this male is referred to this species, which was taken only at high elevation in Sumatra.