Scymnus (Orthoscymnus) jilongicus Chen & Ren

Chen, Xiaosheng, Canepari, Claudio, Wang, Xingmin & Ren, Shunxiang, 2016, Revision of the subgenus Orthoscymnus Canepari of Scymnus Kugelann (Coleoptera, Coccinellidae), with descriptions of four new species, ZooKeys 552, pp. 91-107 : 94-97

Taxon classification Animalia Coleoptera Coccinellidae

Scymnus (Orthoscymnus) jilongicus Chen & Ren sp. n. Figs 2 a–h, 8

Diagnosis.

This species can be separated from other species within the subgenus Orthoscymnus by having a large X-shaped yellow macula on elytra, extending from basal fourth to elytral apex (Fig. 2a). It is also similar to Scymnus (Pullus) testacecollis Kapur in male genitalia, but can be distinguished from it by having slender parameres slightly shorter than penis guide in lateral view (Fig. 2h). In Scymnus (Pullus) testacecollis , the elytra is black with apical 1/4 testaceous; the parameres are narrow at base and expanding gradually toward apex, nearly as long as penis guide in lateral view (see Kapur 1963).

Description.

TL: 1.96-2.06mm, TW: 1.15-1.25mm, TH: 0.81-0.82mm, TL/TW: 1.65-1.70, PL/PW: 0.53-0.55, EL/EW: 1.27-1.34, HW/PW: 0.59-0.61, PW/EW: 0.74-0.76.

Body elongate oval, slightly convex, dorsum covered with white pubescence (Fig. 2 a–c). Head, antennae and mouthparts yellowish brown. Pronotum yellow. Scutellum black. Elytra black with large X-shaped, yellow macula at middle, extending to its apex (Fig. 4a). Prothoracic hypomeron yellow. Prosternum brown to black. Mesoventrite and metaventrite black. Elytral epipleuron brown with inner and outer margins black. Legs yellowish brown.

Head with fine frontal punctures, as large as eye facets, 1.0-2.0 diameters apart. Eyes densely faceted, interocular distance 0.51 times head width. Pronotal punctures similar to those on frons, 1.0-1.5 diameters apart. Surface of elytra with punctures much coarser than those on pronotum, separated by 1.0-2.0 diameters. Prosternal process rectangular, 3.5 times as long as its width at base; with lateral carinae parallel, extending to anterior margin of prosternum. Abdominal postcoxal lines reaching 2/3 length of abdominal ventrite 1 (Fig. 2d), area enclosed by lines coarsely punctate, narrowly smooth along line. Abdominal ventrite 5 in male with apical margin shallowly emarginate and ventrite 6 strongly emarginate medially.

Male genitalia. Penis stout and long (Fig. 2e); penis capsule highly sclerotized with short inner arm and large outer arm; apex of penis with membranous appendage (Fig. 2f). Tegmen extremely stout (Figs 2 g–h) with penis guide parallel-sided from base to apical 3/4 length, then tapering gradually to pointed apex in ventral view (Fig. 2g), flattened and nearly straight in lateral view (Fig. 2h). Parameres narrow, slightly shorter than penis guide, densely covered with long setae at apices (Fig. 2h).

Female externally similar to male but with apex of abdominal ventrite 5 truncate and ventrite 6 rounded apically.

Type material.

Holotype: male, No. SCAU (E) 13196, China: Tibet: Jilong Town, Jilong County, 28°23.00'N, 85°19.60'E, ca 2900 m, 29. X. 2011, Huo LZ leg. Paratypes (17): 2♂13♀ with same data as holotype. 2♂, Zhangmu Port, Nielamu, Rikaze, 27°58.47'N, 85°58.15'E, ca 3000 m, 28. IX. 2009, Chen XS leg. (SCAU)

Etymology.

The species name is derived from the type locality, Jilong Town, Tibet.