Plotina nanlingensis Lin & Wang, 2025

Lin, Fang, Wang, Xingmin, Li, Kuan, Li, Chaorong, Huang, Zhendong, Yi, Yan & Lin, Yuhua, 2025, A new species of the genus Plotina Lewis, 1896 (Coleoptera, Coccinellidae) from Guangdong, China, ZooKeys 1260, pp. 345-351 : 345-351

publication ID	https://doi.org/10.3897/zookeys.1260.164418
DOI	https://doi.org/10.5281/zenodo.17669339
persistent identifier	https://treatment.plazi.org/id/6026557E-1286-5B57-A1DA-269D0C32EA6B
treatment provided by	ZooKeys by Pensoft
scientific name	Plotina nanlingensis Lin & Wang
status	sp. nov.

Treatment

Plotina nanlingensis Lin & Wang sp. nov.

Fig. 1 a – h View Figure 1

Diagnosis.

Species closely resembles P. muelleri (Fig. 2 a – h View Figure 2 ) in general morphology. The newly described species is separated from the latter based on the following features: P. nanlingensis has a markedly larger body, lacks two prominent rounded white spots on the pronotum, and a large, elongate black spot on the middle elytron. Penis guide of P. nanlingensis in ventral view is robust, arrow-shaped, with a concave base. In lateral view, the penis guide is subparallel along basal 2 / 3, then rapidly tapers to a point at the apex.

Description.

Measurements: TL: 5.37–5.93 mm, TW: 4.24–4.69 mm, TH: 2.34–2.89 mm, TL / TW: 1.26–1.27; PL / PW: 0.30–0.32; EL / EW: 1.05–1.06.

Head reddish-brown, eyes dark brown (Fig. 1 c View Figure 1 ). Pronotum dark reddish-brown, anterior angles yellow. Scutellum typically black. Ground color of elytra dark reddish-brown, and each elytron with 2 large yellow maculae and 7 black markings as shown in Fig. 1 a View Figure 1 .

Body broadly oval, moderately convex. Head comparatively small, width 0.39 × elytral width ( HW / EW = 2.57); punctures on frons moderately large, separated by 1.0–1.5 × their diameter, white setae in punctures; eyes small, broadly oval, widest interocular distance 0.54 × width of head. Pronotum 0.68 × elytral width ( PW / EW = 1: 1.47). Pronotal punctures distinct, in two sizes, separated by 0.5–1.5 × their diameter. Punctures on elytra slightly larger than those on head, separated by 0.5–1.0 × their diameter. Punctures on metaventrite fine, 2.0–4.0 × their diameter, short setae in punctures. Abdominal postcoxal lines complete, almost touching posterior margin of ventrite 1 (Fig. 1 d View Figure 1 ).

Male genitalia (Fig. 1 e – h View Figure 1 ): Penis long, slender, penis capsule with both arms well developed; apex simple, pointed, and straight. Penis guide in lateral view, subparallel at basal 2 / 3, rapidly tapering to apex, apex pointed. Parameres slender, subparallel at basal 2 / 3, gradually weakly thickening, sparsely setose at apex, longer than penis guide. Penis guide in inner view, arrow-shaped with concave base, apex rounded, widest at basal third.

Specimens examined.

Holotype. • 1 male, CHINA, Guangdong, Nanling National Nature Reserve, Shaoguan , 800 m, [ 24 ° 55 ' 42 " N, 113 ° 1 ' 27 " E], malaise trap, 28. ix. 2022 – 7. i. 2023, Huang Z. D. leg. ( SCAU) GoogleMaps . Paratypes. • 7 males, same data as holotype ( SCAU) GoogleMaps .

Distribution.

China ( Guangdong).

Etymology.

The new species is named after its type locality, Nanling National Nature Reserve.

Checklist of the genus Plotina

Plotina muelleri Mader, 1955

Plotina mülleri Mader, 1955 a: 73 ; 1955 b: 1026.

Plotina muelleri : Miyatake 1969: 202; Pang and Mao 1979: 24; Kovář 1995: 61; Wang et al. 2011: 57.

Distribution. China ( Fujian, Guangdong, Guizhou, Hainan, Hunan, Sichuan); Vietnam.

Plotina octomaculata Wang et al., 2011

Plotina octomaculata Wang et al., 2011: 57 .

Distribution. China ( Tibet).