Scymnus (Parapullus) dichotomus, Chen, Xiaosheng, Ren, Shunxiang & Wang, Xingmin, 2015

Chen, Xiaosheng, Ren, Shunxiang & Wang, Xingmin, 2015, Contribution to the knowledge of the subgenus Scymnus (Parapullus) Yang, 1978 (Coleoptera, Coccinellidae), with description of eight new species, Deutsche Entomologische Zeitschrift 62 (2), pp. 211-224 : 212-213

Taxon classification Animalia Coleoptera Coccinellidae

Scymnus (Parapullus) dichotomus sp. n. Figs 6, 11

Diagnosis.

This species is similar to Scymnus (Parapullus) aduncatus Chen, Ren & Wang, 2012 in general appearance, but can be distinguished from it by having robust basal part of penis guide in lateral view (Fig. 6h) and the blunt apex in lateral view (Fig. 6g).

Description.

TL: 2.16 mm, TW: 1.46 mm, TH: 0.97 mm, TL/TW: 1.48, PL/PW: 0.52, EL/EW: 1.14, HW/PW: 0.63, PW/EW: 0.71.

Body elongate oval, moderately convex, dorsum covered with white pubescence (Figs 6 a–c). Head, antennae and mouthparts brown. Pronotum yellowish brown. Scutellum black. Elytra black with apical 1/6 yellowish brown. Prothoracic hypomeron and prosternum yellowish brown. Mesoventrite, metaventrite and elytral epipleura black. Legs brown.

Head with fine frontal punctures, as large as eye facets, 1.0-2.0 diameters apart. Eyes densely faceted, interocular distance 0.49 times head width. Pronotal punctures larger than those on frons, 1.0-2.0 diameters apart. Surface of elytra with punctures similar to those on pronotum, separated by 2.0-3.0 diameters. Prosternal process trapezoidal, 2 times as long as its width at base; with lateral carinae distinct, extending to anterior margin of prosternum, slightly convergent anteriorly. Abdominal postcoxal lines weakly recurved and distinctly incomplete laterally (Fig. 6d), reaching 4/5 length of abdominal ventrite 1, area enclosed by lines finely punctate, broadly smooth along line. Abdominal ventrite 5 in male with apex truncate.

Male genitalia: penis slender (Fig. 6e). Penis capsule stout with outer arm large and inner arm strongly curved upwardly. Apex of penis simple (Fig. 6f). Tegmen stout (Figs 6 g–h) with penis guide narrowest at base, expanding toward apex, then tapering abruptly to blunt apex in ventral view (Fig. 6g) and strongly curved outwardly in lateral view (Fig. 6h). Parameres slightly constricted at base, distinctly shorter than penis guide, densely covered with two groups of long setae at apices (Fig. 6h).

Female unknown.

Type material.

Holotype: male, No. SCAU (E) 11388, China: Yunnan: Xujiaba, Ailaoshan National Nature Reserve, Jingdong County, 24°32.77'N, 101°01.69'E, ca 2500 m, 17. VIII. 2013, Chen XS leg.

Distribution.

China (Yunnan).

Etymology.

The specific epithet refers to its apex of paramere densely covered with two groups of long setae.