Heterosmylus processus, Dong, Min, Xu, Han, Wang, Yongjie, Jia, Chunfeng & Liu, Zhiqi, 2016

Dong, Min, Xu, Han, Wang, Yongjie, Jia, Chunfeng & Liu, Zhiqi, 2016, Revision of the genus Heterosmylus Krueger, 1913 from China (Neuroptera, Osmylidae), ZooKeys 637, pp. 107-128 : 111

Heterosmylus processus sp. n. Figs 2, 3-6

Material examined.

Holotype Male. CHINA: Shaanxi (Province): Taibai, [33°55'N, 107°43'E] 09.v.1982, leg. Guojun Qi. [Verbatim label data translated from Chinese]: CHINA: Shaanxi, Taibai/ 09.v.1982/ Guojun Qi/ CAU. Terminalia cleared in KOH, and stored in a micro-vial pinned below the specimen.

Diagnosis.

Pronotum with four brown spots at anterior margin, two round brown spots in middle and two brown spots at posterior margin; membrane hyaline, pterostigma yellow, without dark spots besides the pterostigma; veins light yellow at base but brown from middle to the end; mediuncus C-shaped in lateral view with a basal process and boat-shaped in dorsal view.

Description.

Body length 8.6 mm. Head. Vertex yellow with brown setae; ocelli distinctively brown; compound eyes black; antennae yellow with a brown stripe at base; frons with two brown stripes, genae with two round brown spots; maxillary palpi yellow and thick, labium short and brown. Thorax. Yellow dorsally and dark brown ventrally; pronotum with four brown spots at anterior margin, two round brown spots in middle and two brown spots at posterior margin linking to the mesonotum; mesonotum with two brown spots in middle on both sides; metanotum similar to the mesonotum, with two spots in middle. Legs. Yellow with brown setae; claws brown with a small tooth. Wings (Fig. 2): Forewing length 15.4 mm, width 6.2 mm; membrane hyaline without any spot besides the yellow pterostigma; veins yellow; costal field broad, cross-veins simple without forks. Cross-veins in radial sector few besides the gradate cross-veins. Rs with 8 branches. The basal cross-vein between R1 and M edged with a brown mark. Hind wing length 14.4 mm, width 5.3 mm; membrane hyaline, veins light yellow at base but brown from middle to the end. Costal field narrow, pterostigma yellow, and Rs with 7 branches. Abdomen. Yellow dorsally, dark brown ventrally, covered with yellow setae.

Male Terminalia (Figs 3-6). Ectoproct quadrate in lateral view; callus cerci rounded and small. Distal part of gonarcus bent upwards. Entoprocesses curved in middle and dilated apically. Mediuncus (Figs 4-5) C-shaped in lateral view with a basal process and boat-shaped in dorsal view; two mediuncus lobes fused at base and each one raised on both sides, the inner side larger than the outer one.

Distribution.

China (Shaanxi).

Etymology.

The specific name refers to the process at the base of the mediuncus.

Remarks.

This species is known from its type locality, Shaanxi province. It is easily distinguished from other species in the genus because of the body coloration, morphology and the genital characters. Heterosmylus processus sp. n. has a smaller body size and hyaline wings, while the others usually have a patterned membrane. Moreover, the mediuncus within the new species possesses a distinct process at the base whereas it is absent in the other species of Heterosmylus .