Chrysolina hohxilensis Daccordi et Ge

Ge, Si-Qin, Daccordi, Mauro, Li, Wen-Zhu & Yang, Xing-Ke, 2011, Seven new species of the genus Chrysolina Motschulsky from China (Coleoptera: Chrysomelidae: Chrysomelinae), Zootaxa 2736, pp. 31-43 : 34-35

publication ID	https://doi.org/ 10.5281/zenodo.200885
DOI	https://doi.org/10.5281/zenodo.6187535
persistent identifier	https://treatment.plazi.org/id/E57F87BD-E75A-2E59-FF64-FDD4FBC7FD33
treatment provided by	Plazi
scientific name	Chrysolina hohxilensis Daccordi et Ge
status	sp. nov.

Treatment

Chrysolina hohxilensis Daccordi et Ge , sp. nov.

( Figs. 2 View FIGURE 2 A–F)

Diagnosis. Metallic dark; hind-wing absent; pronotum lacking setigerous punctures on sides of anterior and posterior angles; hind tarsi entirely pubescent beneath in male, pubescent ventro-laterally in female tarsomere 5 not ventrally toothed; inner edge of epipleura with 1/3 length bristles; pygidium with arcuate apex, without longitudinal depression medially.

Description (based on holotype): Colour: Metallic dark; tarsomere 1 of antennae, apical three segments of maxillary palpi, apex of mandible reddish brown; compound eyes dark; legs yellowish brown.

Body length: 3.52 mm; width: 2.32 mm.

Body elongate-ovoid ( Fig. 2 View FIGURE 2 A), small, convex in lateral view; hind wing absent.

Head: Clypeus with sparse pubescence, with small and sparse punctures, base of clypeus raised; labrum incised antero-medially; frons smooth, with sparse, small punctures; coronal suture present, frontal suture present, but very shallow; vertex smooth, with sparse and small punctures, basal part near pronotum almost without puncture; compound eyes oblong, dorso-ventral eye length 0.16 mm, interocular distance 0.96 mm; distance from antennal insertion to eye 0.17 mm; distance from antennal insertion to clypeus 0.06 mm; mandible with two denticles, outer surface with sparse pubescence, with large, sparse punctures; third segment of maxillary palpi shorter than fourth, apex of fourth segment truncate; Antennae with basal segments narrow, widening from segments 6 to 11; antennal segment (1–11) lengths (in millimeter): 0.16: 0.08: 0.12: 0.16: 0.16: 0.16: 0.16: 0.16: 0.16: 0.16: 0.32 ( Fig. 2 View FIGURE 2 B).

Pronotum: Length: 1.2 mm; width: 2.36 mm; without setigerous punctures on sides of anterior and posterior angles; central disc with small, sparse punctures, similar to those of head; without callus and depression; punctures denser and lateral part of disc denser than on central part.

Scutellum: Ligulate , without punctures.

Elytra: Suture length: 3.36 mm; width of elytra: 2.64 mm; elytron with punctures forming 9 regular single striae; sutural stria also present; elytral punctures larger than those of side of pronotum; interspaces of elytral striae with small and sparse punctures; inner edge of epipleura with 1/3 length bristles.

Legs: Femora and tibia with sparse and moderate punctures, sparse pubescence; tarsomere 1 of male protarsus enlarged, hind tarsi entirely pubescent beneath, relative lengths of hind tarsomeres: 5>3>1>2, tarsomere 5 not ventrally toothed ( Fig. 2 View FIGURE 2 F).

Venter: Hypomera smooth, without punctures; middle part of intercoxal prosternal process more than half width of apex; prosternum without punctures, truncate and not emarginate behind; metaventrite shorter than prosternum with sparse pubescence, and with sparse and moderate punctures only close to posterior side, mesoventrite shorter than prosternum between coxae; mesepisternum and mesepimeron without punctures; metepisternum with moderate and sparse punctures; abdomen with moderate, dense punctures; pygidium with arcuate apex, without longitudinal depression medially.

Median lobe of aedeagus ( Figs. 2 View FIGURE 2 D–E): Basal part much broader than apex; curved in lateral view. Flagellum slender.

Variability. All males of the type series are very similar in size, shape and lustre, tarsomere 1 of protarsi enlarged in male; tarsomere 3 of hind tarsi of female with pubescence beneath only at ventro-lateral areas. In some specimens, vertex with much denser punctures, frontal suture distinctly present; interspaces of elytral striae with much denser punctures; spermatheca absent. Measurements of the paratypes are as follows: body length: 3.92–4.72 mm; body width: 2.32–2.64 mm; length of pronotum: 1.04–1.44mm; width of pronotum: 2.08–2.64 mm; suture length: 2.56–4.0 mm; width of elytra: 2.96–3.12 mm; dorso-ventral eye length: 0.16–0.24 mm; interocular distance: 0.96–1.20 mm; antennae segment (1–11) length (in millimeter): 0.16–0.32: 0.08–0.16: 0.12–0.16: 0.12– 0.16: 0.12–0.16: 0.12–0.16: 0.12–0.16: 0.16: 0.16: 0.16: 0.32 ( Fig. 2 View FIGURE 2 C).

Remarks. Members of this new species are similar to those of Chrysolina amplicollis Lopatin , with which they share elytra single-striated, interspaces of elytra striae with sparse punctures. However, members of the new species have the flagellum longer and much more robust, lateral sides smooth and without depression in lateral view.

Type material. Holotype: male, China: Qinghai: Hoh Xil, 4800m, 17 July 1990, leg. Xue-Zhong Zhang ( IZAS). Paratypes: 3 males and 1 female, same data as holotype (2 males and 1 female in IZAS, 1 male in MDc); 1 male, Qinghai: Hoh Xil, south of Fuku Lake, 4600m, 17 July 1990, leg. Xue-Zhong Zhang ( IZAS); 1 female, Qinghai: Hoh Xil, south of Fuku Lake, 4600m, 11 July 1990, leg. Xue-Zhong Zhang (MDc).

Distribution. Qinghai (Fig. 8).

Etymology. The new species is named for the locality of the type specimen.