Reniscymnus explanatus Peng & Chen, 2025

Peng, Feng, Tang, Mingjie, Wang, Xingmin & Chen, Xiaosheng, 2025, Reniscymnus gen. nov., a new genus of Scymnini (Coleoptera, Coccinellidae) from the Oriental region, ZooKeys 1226, pp. 87-100 : 87-100

Reniscymnus explanatus Peng & Chen sp. nov.

Fig. 3

Diagnosis.

This species is similar to Reniscymnus cordatus sp. nov. in colour pattern, but can be distinguished from the latter by the relatively shortened inner arm of penis, flattened apex of penis, and the unique tegmen with penis guide recurved inwardly at apex in lateral view and constricted at base in inner view.

Description.

TL: 1.51–1.65 mm, TW: 1.13–1.21 mm, TH: 0.70–0.83 mm, TL / TW: 1.33–1.36, EL / EW: 1.05–1.07, PL / PW: 0.50–0.51, HW / PW: 0.66–0.68, PW / EW: 0.66–0.69.

Body rounded oval, dorsum with white pubescence. Area of frons near clypeus with suberect and downward setae, distinctly longer and denser than those on top (Fig. 3 B ). Body yellow, except tip of mandibles dark brown, metaventrite deep yellow in middle and elytral epipleurae brown (Fig. 3 A – C ). Eyes finely faceted, large, interocular distance about 0.33–0.34 times head width. Head and pronotal punctures fine and dense. Surface of elytra with coarse, shallowly impressed punctures.

Abdominal postcoxal lines incomplete and roundly recurved, reaching 5 / 6 length of ventrite 1, area enclosed by the lines sparsely punctate, widely smooth along the lines; ventrite 1 with coarse and sparse punctures in middle, irregularly distributed (Fig. 3 D ).

Male genitalia. Penis stout and relatively short, shorter than abdomen; penis capsule with short inner arm, slightly longer than outer arm (Fig. 3 E ); apex of penis wide, flattened with few membranous appendages (Fig. 3 F ); tegminal strut stout with finger-like protrusion at apex (Fig. 3 G ); phallobase rounded in lateral view; tegmen with penis guide widest at base, gradually converging apically, slightly recurved at apex in lateral view, 3 times as long as parameres (Fig. 3 G ); in inner view, penis guide slightly constricted at base, widest in basal 1 / 3, then gradually tapering apically, apex blunt (Fig. 3 H ); parameres short with several long setae at apex (Fig. 3 H ).

Type material.

Holotype: Laos • ♂; Pakxong ; alt. 1280 m, 24 May 2007; X. M. Wang et al. leg. No. SCAU (E) 17561 ; SCAU . Paratypes: • 1 ♀; same data as for holotype • 1 ♂; Heu Gnommolat ; alt. 380 m; 25 May 2007; X. M. Wang et al. leg . • 1 ♀; Phou Khao Kbouay NBCA ; alt. 500–750 m; 2–4 Jun. 2007; X. M. Wang et al. leg . • 5 ♂ 9 ♀; Khammouane Tnangend ; 21 Dec. 2005; C. Telakang leg. • 1 ♂; Khammouane Lakxao ; 16 Dec. 2005; C. Telakang leg. • 1 ♀; Khammouane Thakhex ; 25 Dec. 2005; C. Telakang leg.

Distribution.

Laos.

Etymology.

The species epithet is derived from the Latin adjective “ explanatus ”, referring to the flattened apex of the penis.

Figures

Figure 3. Reniscymnus explanatus Peng & Chen, sp. nov. (A – H holotype I – O paratype) A dorsal view B frontal view C lateral view D abdomen E penis F apex of penis G tegmen, lateral view H tegmen, inner view I antenna J maxilla K mandible L labium M hind leg N spermatheca O coxites. Scale bars: 0.5 mm (A – C); 0.1 mm (D – H); 0.05 mm (I – O).