Tetracnemus kozlovi Sharkov, 1984

Kang, Ning, Hu, Hongying, Guo, Shuhan & Luo, Shungang, 2024, A new genus and three newly recorded species of Encyrtidae (Hymenoptera, Chalcidoidea) from China, ZooKeys 1193, pp. 49-61 : 49

Tetracnemus kozlovi Sharkov, 1984

Fig. 5A-G

Tetracnemus kozlovi Sharkov, 1984: 90-91.

Material examined.

10♀♀ 28♂♂, China, Xinjiang, Ruoqiang, Altun Mountain Nature Reserve, 36°56′25.85″N, 90°16′48.23″E, Altitude : 4023 m, 21.VII.2020. Coll. Shun-Gang Luo, by yellow pan trapping . 8♀ 7♂, 36°58′10.89″N, 90°14′44.19″E, Altitude : 4021.95 m, 21.VII.2021. Coll. Ning Kang, by sweeping (all deposited in ICXU) .

Diagnosis.

Female. Length 1.5-2 mm, body deep green with purple metallic luster at mesoscutum (Fig. 5A ); eyes dark red, mandible yellowish-brown; antenna and legs dark brown, scape with metallic reflection; wings with basal 2/3 hyaline and tip 1/3 with dark band; the distal 1/2 of tibiae and tarsi yellow. Torulus below the ventral edge of eyes (Fig. 5B ); scape distinctly enlarged ventrally, flagellum obviously widened (Fig. 5C ), ocelli forming an acute angle (75-85°), OCL 2.15 × OOL; scape about 2 × as long as broad, and ventral side enlarged obviously, all the funicles transverse, clava unsegmented. Mesoscutum with shallow reticulate engraving, axillae separated medially, wings degenerated, not exceeding the propodeum and truncated distally (Fig. 5D ). The exserted part of ovipositor 0.6 × gaster length.

Male. Length 1.2-1.3 mm (Fig. 5E ), antennal funicle with long branches, clava unsegmented; forewing not degenerated and length exceeding beyond the end of gaster (Fig. 5F ), wings infuscate, venation brown, linea calva interrupted with four lines of seta, post marginal vein shorter than marginal vein, longer than stigmal vein.

Hosts.

Unknown.

Distribution.

China (Xinjiang) new record; Russia.

Comments.

For the similar short-winged species within the genus, there are obvious morphological differences compared to this species. For example, the antennal scape of T. subapterus is not broadened or flattened, each funicle segment is longer than wide, and the ovipositor sheaths are very short. The base of the antennal scape in T. hofferi is noticeably shortened, ovipositor sheaths are about 2/3 length of gaster, and the head has a deep microcellular sculpture. The antennal scape of T. heydeni is smoothly rounded ventrally, ocelli form an equilateral triangle, and the outer edges of the scrobes are acute ( Trjapitzin 2012).

Figures

Figures 5. Tetracnemus kozlovi Sharkov, female A habitus, lateral view B head, frontal view C antenna D forewing. Male: E habitus, dorsal view F forewing. Scale bars: 100 μm.