Chilocorus vientianicus Li & Wang, 2021

Li, Wenjing, Chen, Bingxu, Toulakhom, Chantharath & Wang, Xingmin, 2021, Two new species of Chilocorus Leach, 1815 from Laos (Coleoptera Coccinellidae Chilocorini), Biodiversity Data Journal 9, pp. 72966-72966 : 72966

Chilocorus vientianicus Li & Wang sp. n.

Materials

Type status: Holotype. Occurrence: recordNumber: No. 202107-02; recordedBy: Wenjing Li; individualCount: 1; sex: 1 male; lifeStage: adult; previousIdentifications: Chilocorus politus; Taxon: scientificName: Chilocorus vientianicus Li & Wang, sp. n.; Location: country: Laos; locality: VangVieng, Vientiane ; georeferenceProtocol: label; Identification: identifiedBy: Wenjing Li; dateIdentified: 2021; Event: samplingProtocol: sweeping; eventDate: 06/07/ 2006 Type status: Paratype. Occurrence: recordedBy: Wenjing Li; individualCount: 8; sex: 4 male, 4 female; lifeStage: adult; previousIdentifications: Chilocorus politus; Taxon: scientificName: Chilocorus vientianicus Li & Wang, sp. n.; Location: country: Laos; locality: VangVieng, Vientiane ; georeferenceProtocol: label; Identification: identifiedBy: Wenjing Li; dateIdentified: 2021; Event: samplingProtocol: sweeping; eventDate: 06/07/2006

Description

TL: 4.91-5.66 mm, TW: 4.58-5.35 mm, TH: 3.07-3.75 mm, TL/TW: 1.05-1.07, PL/PW: 0.54-0.57, EL/EW: 0.98-0.99.

Body roundish, strongly convex. Head, mouthparts and antenna brownish-red, sparsely covered with short, greyish pubescence. Pronotum, scutellum and elytra glabrous, brownish-red (Fig. 2 a-c). Underside brownish-yellow, sparsely covered with short, greyish pubescence.

Head relatively large, 0.52-0.53 times pronotal width, punctures on frons large and densely distributed, 0.5-1.5 diameters apart, surface polished between punctures. Eyes approximately oval, densely faceted, interocular distance 0.47 × as wide as head (Fig. 2 c). Pronotum 0.53 × as wide as elytra, pronotal punctures moderately large and moderately densely distributed, smaller than those on head, 1.5-2.5 diameters apart, surface polished between punctures. Punctures on elytra moderately large and sparsely distributed, 2.0-3.5 diameters apart, similar to those on pronotum. Prosternal process moderately broad, slightly expanded to apex. Abdominal postcoxal lines incomplete, reaching posterior margin of abdominal ventrite 1 and running along posterior margin, then almost reaching lateral margin. Posterior margin of male abdominal ventrite 5 broadly rounded and ventrite 6 slightly emarginate medially (Fig. 2 d).

Male genitalia: penis slender, penis capsule with long outer and short inner arm, apex of penis truncate with membranous appendage (Fig. 2 e-f). Tegmen stout, penis guide narrow at base, guide slightly narrow at base, gradually broadened up to basal 1/2, abruptly tapering from apical 1/4 to apex, approximately symmetrical in ventral view; penis guide in lateral view widest at base, parallel along basal 5/8, after that abruptly converging to apex; parameres nearly as long as the penis guide with dense short setae on the inner sides and distal end with a group of short setae in lateral view (Fig. 2 g-h).

Female genitalia: coxites elongate, subtriangular, outer margin almost straight, inner margin distinctly concave near apical 1/3 (Fig. 2 i).

Diagnosis

This species resembles C. toulakhomianus , sp. n. in the body size and colouration, but can be distinguished by the following characters: apex of penis truncate with membranous appendage, without spiral grain; penis guide widest at base, parallel along basal 5/8, after that abruptly converging to apex in lateral view; coxites elongate outer margin almost straight, inner margin distinctly concave near apical 1/3.

Etymology

The specific epithet is named after Vientiane, the type locality of this ladybird.

Distribution

Laos (Vientiane) (Fig. 3 ).

Figures

Figure 2. Chilocorus vientianicus Li & Wang, sp. n. a; dorsal view b lateral view; c frontal view; d abdomen; e penis; f apex of penis; g tegmen, lateral view; h tegmen, ventral view; i ovipositor. Scale bars: 0.1 mm.

Figure 3. Distribution map. (■) Chilocorus toulakhomianus Li & Wang, sp. n. (★) Chilocorus vientianicus Li & Wang, sp. n.