Scymnus (Orthoscymnus) paradoxus 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 : 97

Taxon classification Animalia Coleoptera Coccinellidae

Scymnus (Orthoscymnus) paradoxus Chen & Ren sp. n. Figs 3 a–h, 8

Diagnosis.

This species can be easily recognized by its elongate and compressed body and the peculiar characters on male genitalia, particularly the extremely broad, spade-shaped penis guide in ventral view (Fig. 3g).

Description.

TL: 1.64-1.96 mm, TW: 0.97-1.09 mm, TH: 0.70-0.77 mm, TL/TW: 1.69-1.79, PL/PW: 0.55-0.56, EL/EW: 1.29-1.37, HW/PW: 0.59-0.61, PW/EW: 0.74-0.79.

Body elongate oval, slightly convex, dorsum covered with white pubescence (Figs 3 a–c). Head, antennae and mouthparts yellowish brown. Pronotum yellow. Scutellum black. Elytra black with apical margin narrowly brown. Prothoracic hypomeron and prosternum yellow. Mesoventrite, metaventrite and elytral epipleura black. Legs yellowish brown.

Head with fine frontal punctures, as large as eye facets, 0.5-1.0 diameter apart. Eyes densely faceted, interocular distance 0.47 times head width. Pronotal punctures larger than those on frons, 1.0-2.0 diameters apart. Surface of elytra with punctures much larger than those on pronotum, separated by 2.0-3.0 diameters. Prosternal process rectangular, 5 times as long as its width at base; with lateral carinae parallel, extending to anterior margin of prosternum. Abdominal postcoxal lines reaching 4/5 length of abdominal ventrite 1 (Fig. 3d), area enclosed by lines finely punctate, broadly smooth along line. Abdominal ventrites 5 and 6 in male strongly emarginate apically.

Male genitalia. Penis slender (Fig. 3e); penis capsule highly sclerotized with short inner arm and large outer arm; apex of penis with membranous appendage (Fig. 3f). Tegmen extremely stout (Fig. 3 g–h) with penis guide broad, spade-shaped in ventral view (Fig. 3g). Parameres very narrow in lateral view, slightly longer than penis guide, sparsely covered with long setae at apices and inner sides (Fig. 3h).

Female externally similar to male but with black pronotum, abdominal ventrite 5 truncate and ventrite 6 rounded apically.

Type material.

Holotype: male, No. SCAU (E) 13193, China: Tibet: Zhangmu Town, Nielamu County, 27°58.47'N, 85°58.15'E, ca 2200 m, 31. X. 2011, Chen XS leg. Paratypes (5): 5♀ with same data as holotype. (SCAU)

Distribution.

China (Tibet).

Etymology.

The species name is an adjective derived from Latin ( ‘paradoxus’ = strange), referring to its peculiar shape of penis guide.