Cantonius (Procantonius) qiyunensis 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 (Procantonius) qiyunensis Shi, Song & Xu sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: SXD 2021001♂ ; sex: male; occurrenceID: EAB880CE-E012-5BEF-ADB2-7FE24EB6D016; Location : country: China; stateProvince: Jiangxi Province; county: Chongyi County; municipality: Ganzhou City ; locality: Qiyun mountains ; verbatimElevation: 630 m; locationRemarks: label: Qiyun mountains , Chongyi County , Ganzhou City, Jiangxi Province, elevation 630 m, feeding larvae in leaf-mines on Bambusa blumeana, adults emerged on 05.Ⅲ.2021, Jia-Sheng Xu leg.; Record Level: institutionCode: LGNU Type status: Paratype. Occurrence: catalogNumber: SXD 2021006♂, SXD 2021007♂, SXD 2021008♂ ; sex: 3 male; occurrenceID: 1E7F8F52-AFF4-5719-B22D-7F17E9D40EBF; Location: locationRemarks: same label data as holotype; Record Level: institutionCode: CHTS, LGNU

Description

Body length 3.4-3.9 mm, body width 1.2-1.5 mm. Body moderately narrow, 2.6-2.9 times as long as wide, moderately convex. Elytra blackish-bronze, but the head and pronotum bronze, rather lustrous, non-shagreened, with delicate, finely reticulate shagreenity only on the concave areas of pronotum and on ventral surface, with silky lustre (Fig. 4 ).

Head large and wide, about the same width as or slightly narrower than the pronotum, slightly angularly widened behind eyes, widest at mid-length between posterior margin of eyes and anterior margin of pronotum. Head depressed anteriorly. Eyes large, oval, moderately convex, not or slightly projecting beyond contour of head, almost as long as temples in dorsal view. Temples regularly arcuate. Surface with dense, simple, flat rounded punctures. Male with golden setae dense on frons and sparser on vertex. Antennae 11-segmented, serrate beginning with 6th segment; 6th segment slightly longer than wide, 7-10th segments about as long as wide and 11th segment longer than wide.

Pronotum 1.9-2.0 times as wide as long, with sides nearly straight or slightly irregularly and weakly arcuate, widest at anterior 1/3-1/4. Anterior margin strongly bisinuate, sharply concave on both sides, slightly raised in middle and mid-point much lower than anterior angles of pronotum. Posterior margin slightly bisinuate, basal lobe slightly projecting. Pronotum weakly convex. Lateral carinae nearly straight, directly to concaved part of anterior margin and not reaching anterior angles; posteriorly connected with raised posterior margin of pronotum, slightly inward from its posterior angles. Surface with scarce punctures. Flat punctures in depressed portions of disc. Scutellum large, transversely triangular.

Elytra 1.9-2.1 times as long as wide, much wider than pronotum and widest nearly at middle. Apices strongly separated, rounded, with several ill-defined teeth. Surface densely covered with coarse punctures and irregular coarse undulate transverse wrinkles.

Femora with a row of small teeth at inner side. Tibiae strongly arched. In female extended a little wider in posterior 1/3.

Male genitalia strongly sclerotised, parameres triangular with rounded apices distally (Fig. 5 ).

Pupa in Fig. 6 .

Diagnosis

Remarks

With the narrow body, 2.6-2.9 times as long as wide and elytra 1.9-2.1 times as long as wide, this new species resembles to C. (P.) jendeki Kalashian, 2004 and C. (P.) austrisinicus Kalashian, 2021. Temples almost regularly rounded can separate this species from C. (P.) austrisinicus and elytra widest nearly at middle can separate this species from C. (P.) jendeki . This new species can also be distinguished from all other congeners by the following characters: 1) head and pronotum bronze, but not blackish-bronze as the elytra; 2) anterior margin strongly bisinuate, the mid-point much lower than the anterior angles of the pronotum.

Etymology

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

Distribution

Known from type locality in the Qiyun Mountains (China: Jiangxi Province) at an elevation about 700 m.

Biology

Habitat: mostly found in the alpine subtropical broadleaf evergreen forest in mountains along streams and roadsides (Fig. 7 a).

Host plant: Bambusa blumeana , Bambusoideae ( Gramineae ) (Fig. 7 b).

Leaf mine: This species often have meandering shape mines. Larvae exist from late October to mid-March with only one bamboo leaf mine in Ganzhou. The mine appears as an amorphous blotch with a dark brown line in the early period (Fig. 8 a). Then turn into a meandering thick line (Fig. 8 c). The last instar larvae build pupal cell at the end of the leaf-mine and pupating inside (Fig. 8 d). After biting the pupal epidermis (Fig. 8e, f), adult climb out and move around from March to May. Then they mate and lay eggs on the leaves of host plants which is easy to be found (Fig. 8 b).

Figures

Figure 4. Habitus of Cantonius (Procantonius) qiyunensis sp. n.: a dorsal view of holotype male; b ventral view of holotype male.

Figure 5. Male genitalia of Cantonius (Procantonius) qiyunensis sp. n.: a dorsal view; b ventral view; c lateral view.

Figure 6. Pupa of Cantonius (Procantonius) qiyunensis sp. n.: a dorsal view; b ventral view.