Scymnomorphus isolateralis, Wang & Ren, 2012

Wang, Xingmin & Ren, Shunxiang, 2012, A review of Chinese Scymnomorphus Weise (Coleoptera: Coccinellidae) with description of five new species, Journal of Natural History 46 (31 - 32), pp. 1905-1920 : 1911-1912

publication ID	https://doi.org/ 10.1080/00222933.2012.693958
persistent identifier	https://treatment.plazi.org/id/038587F3-FFEF-8864-54A1-FF70FB8DFF24
treatment provided by	Felipe
scientific name	Scymnomorphus isolateralis
status	sp. nov.

Treatment

Scymnomorphus isolateralis sp. nov.

( Figures 1A–I View Figure 1 , 2A View Figure 2 , 3A–E View Figure 3 , 6)

Diagnosis

This species is similar to S. bicolor in male genitalia, but it can be distinguished from the latter as follows: body uniformly brown, without other external spots ( Figure 2A View Figure 2 ), penis guide in lateral view slender, flattened and quadrate, with apex truncated( Figure 3D View Figure 3 ), penis guide in ventral view elongate ( Figure 3E View Figure 3 ). In S. bicolor , head and pronotum are dark brown and elytra black, penis guide in lateral view is elongate with apex pointed, and penis guide in ventral view is stout.

Description

TL: 1.38–1.46 mm, TW: 1.04–1.09 mm, TH: 0.60–0.62 mm, TL / TW: 1.32–1.33; PL / PW: 0.58–0.61; EL / EW: 1.10–1.11.

Body uniformly brown, without other external spots ( Figure 2A View Figure 2 ). Head yellowish brown. Underside brown, except mesoventrite and metaventrite dark brown. Legs yellowish brown.

Body minute, short oval, distinctly convex; dorsum pubescent. Head small, 0.45 times elytral width (HW / EW = 1: 2.21); punctures on frons fine, separated by 0.8–3.0 times their diameter, with short setae in punctures; eyes small and coarsely faceted, widest interocular distance 0.63 times width of head. Pronotum 0.74 times elytral width (PW / EW = 1: 1.35), pronotal punctures fine, slightly smaller than those on head, separated by 1.5–5.0 times their diameter. Punctures on elytra larger than those on head, separated by 0.5–1.0 times their diameter. Surface of proventrite and mesoventrite shagreened. Punctures on metaventrite larger in middle, separated by 0.2–0.5 times their diameter, with short setae in punctures; becoming smaller towards lateral parts. Abdominal postcoxal line incomplete or reaching lateral margin smoothly, divided into two lines, with associated pits and pores ( Figure 3A View Figure 3 ).

Male genitalia. Penis simple and slender, curved and narrowing toward apex; penis capsule with a short and stout outer process and a small inner one ( Figure 3B,C View Figure 3 ); penis guide in lateral view long, flattened and quadrate, six times as long as wide, with apex truncated; parameres very short and indistinct, with rather long setae ( Figure 3D View Figure 3 ); penis guide in ventral view elongate, widest near base and strongly narrowed at base, apex pointed and strongly bent ( Figure 3E View Figure 3 ).

Type material

Holotype: 1♂, China, Yunnan: Dajianshan, Pingbian , 2100 m, 20 April 2008, Wang XM leg. Paratypes: China, Yunnan:, 1♂ 1♀, same data as holotype ; 4♂♂, Dajianshan, Pingbian, 2100 m, 22 May 2009, Wang XM leg; 3♂♂, Gaoligongshan, Baoshan, 19 September 2006, Wang XM leg.

Distribution

China (Yunnan).

Etymology

The specific epithet refers to the flattened and quadrate penis guide in lateral view.