Trichadenotecnum sabahense Yoshizawa & Lienhard, 2015, n. sp.

Trichadenotecnum sabahense n. sp.

(Figs 1 C, 4)

Holotype. Male. MALAYSIA: SABAH (Interior Residency): Kimanis road, 16 miles from Keningau, heliport, sifting in cloud forest, 1380 m, 12.v.1982, B.Hauser leg (sabah1, KY461) (will be deposited in the Muséum d’histoire naturelle, Geneva, Switzerland).

Description. Male. Head. Head white in ground color; vertical markings blackish brown, each marking touching with neighbors; with pair of anterior spots anterior to vertical markings; orbital markings obscure; coronal suture blackish; epicranial suture narrowly bordered with brown band dorsally; frons with pair of brown markings medially; gena white; eye black, IO/D=1; ocelli white, ocellar field brown; postclypeus with brown spots medially; anteclypeus brown. Antenna brown, scape and pedicel darker. Mouthparts brown.

Thorax. Prothorax brown. Mesoscutum with large brown marking on each lobe, marking on anterior lobe darker, scutellum dark brown. Mesopleuron white except for brown precoxal bridge and trochantin. Metascutum mostly brown, medially with pale region; scutellum dark along anterior margin, pale along posterior margin. Metapleuron brown except for white membranous region.

Legs. Coxae of all legs dark brown. Fore legs brown except for white distal half of femur. Mid and hind legs white except for brown basal end of femur and tarsus.

Forewing (Fig. 1 C). As in group diagnosis; distal spot in cell a apparent; spot on roof of m3 apparent, anterointernally narrowly connected to posterior spot of distal band; roof vein of cell m3 very short, about 1/3 of second section of CuA 1 in length.

Terminalia. Eighth sternum broadly sclerotized, fused to hypandrium posteromedially (Fig. 4 A). Epiproct lobe well developed, strongly expanded dorsally and over clunium; dorsal margin covered by papillae, with posterior projection medially (Fig. 4 AB). Paraproct with tiny basal process covered by denticles; distal process narrow and short, strongly curved, with tiny notch at tip (Fig. 4 A). Hypandrium (Fig. 4 C) with broad membranous region distal to median tongue, anteroventral surface strongly projecting ventrally, with medial swelling covered with papillae; left corner with wrinkled lobe; left process absent; median tongue well developed, unmovable, covered by papillae distally, distal margin only slightly curved; right process well developed, covered by denticles; right corner highly modified, with wrinkled lobe. Phallosome (Fig. 4 D) rounded anteriorly, posteriorly closed, bilobed, covered by papillae.

Measurements. Body 1.7 mm, forewing 2.0 mm, hindwing 1.9 mm.

Female. Unknown.

Distribution. Malaysia (Sabah).

Etymology. The specific epithet refers to the region of origin of the holotype.

Remarks. This species is very close to T. sharkeyi, described above, on the basis of the epiproctal and hypandrial structures, but these species differ clearly in many genital structures, including the distal structure of the phallosome (Figs 3 D and 4D).