Cantonius (Cantonius) anjiensis Shi, Song & Xu, 2023

Shi, Xiao-Di, Wu, Zhi-Ming, Dai, Xiao-Hua, Xu, Jia-Sheng & Song, Hai-Tian, 2023, First biological report on the genus Cantonius (Buprestidae, Agrilinae, Aphanisticini), with descriptions of two new species from China, Biodiversity Data Journal 11, pp. 98405-98405 : 98405

Cantonius (Cantonius) anjiensis Shi, Song & Xu sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: SXD 2021005♂ ; sex: male; occurrenceID: 6A87D4D8-594E-56A9-B811-AB6A22B2825E; Location : country: China; stateProvince: Jiangxi Province; county: Longnan County; municipality: Ganzhou City ; locality: Anji mountains ; verbatimElevation: 300-400 m; locationRemarks: label: Anji mountains , Longnan County , Ganzhou City, Jiangxi Province, elevation 300-400 m, feeding larvae in leaf-mines on Pleioblastus amarus, adults emerged 12.Ⅲ.2016, Jia-Sheng Xu leg.; Record Level: institutionCode: LGNU Type status: Paratype. Occurrence: catalogNumber: SXD 2021006♂, SXD 2021007♀ ; sex: 1 male, 1 female; occurrenceID: 646AD 091-20F1-5A3F-8791-C85051EB35F3; Location: locationRemarks: same label data as holotype; Record Level: institutionCode: CHTS Type status: Paratype. Occurrence: catalogNumber: SXD 2021004♀ ; sex: female; occurrenceID: 6AFCCC52-F38D-566A-ABB4-EFB1FAA21048; Location: locationRemarks: same label data as holotype, but adults emerged 27.Ⅲ.2017, Wan-Hua Liu Leg.; Record Level: institutionCode: LGNU

Description

Body length 3.1-3.4 mm, body width 1.1-1.4mm. Body slender, 2.5-2.7 times as long as wide. Colour black, head, pronotum and elytra with more or less distinct cupreous shine. Surface microreticulated, pronotal convexities and elytral rugae smooth (Fig. 1 ).

Head extremely large, distinctly larger than pronotum, with sides convex strongly and regularly, widest at level much closer to posterior margins of eyes than to anterior margin of pronotum. Eyes rather small, slightly convex in male, but more convex in female. Male temples are about 1.9 times as long as the longitudinal diameter of the eye in lateral view, whereas female temples are around 2.1 times as long. Forehead depressed widely and deeply. Surface with shallow, small and dense punctures and equally distributed thin pubescence. Antennae with 10 antennomeres; male antennomeres serrate, about twice as wide as long; female antennomeres are approximately equilateral.

Pronotum 1.6-1.8 times as wide as long, much narrower than head and elytra, with anterior margin distinctly bisinuate, posterior margin bisinuate with slightly protruded basal lobe widely cut posteriorly. Anterior margin slightly wider than posterior margin in male, but obviously narrow in female and mid-point much higher than anterior angles. Lateral margin strongly straight. Supralateral carinae starting near basal angles of pronotum, slightly convergent anteriorly, reaching discal convexity. Surface with a few rather large, shallow punctures in depressed portions of disc. Scutellum transversely triangular.

Elytra 1.9-2.0 times as long as wide, widest at middle. Apices rounded and widely separated. Elytral sides emarginated slightly concave in anterior 1/3, with a narrow depression. Surface with irregular, transverse rugae and large, shallow punctures.

Tibiae strongly arched.

Male genitalia less sclerotised, parameres with apices rather widely emarginated (Fig. 2 ).

Diagnosis

Remarks

This new species is similar to C. (C.) klapperichi , C. (C.) megacephalus , C. (C.) obenbergeri and C. (C.) terryi by head distinctly wider than pronotum, but can be distinguished from all of these congeners by one of the following characters: 1) pronotal carinae slightly divergent anteriorly; 2) head relatively smaller, eyes larger; 3) body much more slender, 2.5-2.7 times as long as wide, while elytra 1.9-2.0 times as long as wide. It can also be diagnosed by the lateral margin of the pronotum strongly straight.

Etymology

The name of the species is derived from the type locality (Anji Mountains, Longnan County, Jiangxi Province) with reference to the species distribution.

Distribution

Known from type locality in the Anji Mountains (China: Jiangxi Province) at an elevation about 400 m.

Biology

Habitat: mostly along roadsides near to streams in the montane subtropical broadleaf evergreen forest (Fig. 3 a).

Host plant: Pleioblastus amarus , Bambusoideae ( Gramineae ) (Fig. 3 b).

Figures

Figure 1. Habitus of Cantonius (Cantonius) anjiensis sp. n.: a dorsal view of holotype male; b ventral view of holotype male; c dorsal view of paratype female; d ventral view of paratype female.

Figure 2. Male genitalia of Cantonius (Cantonius) anjiensis sp. n.: a dorsal view; b ventral view; c lateral view.