Chrysolina hongyuanensis 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 : 37-38

Chrysolina hongyuanensis Daccordi et Ge , sp. nov.

( Figs. 4 A–F)

Diagnosis. Metallic bronze; hind wing absent; pronotum without callus; elytron with punctures forming irregular single striae; inner edge of epipleura with 1/3 length bristles; pygidium without longitudinal depression medially.

Description (based on holotype): Colour: Metallic bronze; antennae and onychium chestnut, compound eyes dark.

Body length: 5.80 mm; body width: 2.96 mm.

Body elongate-ovoid ( Fig. 4 A), moderate large, convex in lateral view; hind wing absent.

Head: Clypeus with sparse pubescence, with small and sparse punctures; frons smooth, with dense and moderate punctures; coronal suture and frontal suture present; vertex with sparse and small punctures; compound eyes elliptic; dorso-ventral eye length: 0.16 mm; interocular distance: 0.96 mm; distance from antennal insertion to eye 0.13 mm; distance from antennal insertion to clypeus 0.06 mm; mandible with two denticles, outer surface with sparse pubescence, with small and sparse punctures; third segment of maxillary palpi shorter than fourth, apex of fourth segment truncate. Antennae with narrow segments basally, widening from segments 6 to 11; antennal segment 1–11 lengths in millimeter: 0.32: 0.16: 0.24: 0.16: 0.16: 0.16: 0.16: 0.16: 0.16: 0.20: 0.36 ( Fig. 4 B).

Pronotum: Length: 1.76 mm; width: 2.80 mm; lacking setigerous punctures on sides of anterior and posterior angles; central disc with moderate and dense punctures, similar to those of head; with lateral callus; punctures lateral to disc with moderate and dense punctures.

Scutellum : Sub-triangular, with sparse punctures.

Elytra: Suture length: 4.84 mm; width of elytra: 3.68 mm; elytron with punctures forming irregular single striae; sutural striae present, striae with punctures larger than those on side of pronotum; interspaces of elytra striae convex, with moderate and dense punctures, with horizontal wrinkles; inner edge of epipleura with 1/3 length bristles.

Legs: Femora and tibiae with sparse, moderate punctures, sparse pubescence; tarsomere 1 of male protarsus enlarged; hind tarsi entirely pubescent beneath, tarsomere 3 with shallow apical emargination, relative lengths of hind tarsomeres: 5>1> 3> 2, tarsomere 5 not ventrally toothed ( Fig. 4 F).

Venter: Hypomera without punctures, little shagreened; middle part of intercoxal prosternal process more than half width of apex; prosternum without punctures, truncate behind and not emarginate behind; mesoventrite shorter than prosternum between coxae; metaventrite as long as prosternum, without punctures; with sparse and moderate punctures, with sparse pubescence; mesepisternum, mesepimeron and metepisternum without punctures; abdomen with moderate, sparse punctures and sparse pubescence; pygidium with arcuate apex, without longitudinal depression medially.

Median lobe of aedeagus ( Figs. 4 D–E): Basal part slightly wider than apex, curved in lateral view, lateral side with a small tooth apically, flagellum invisible.

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 pubescence beneath. In some specimens, vertex with much denser punctures; interspaces of elytral striae with much denser punctures; spermatheca absent. Measurements of the paratypes are as follows: body length: 5.70–6.10 mm; body width: 2.82–3.01 mm; length of pronotum: 1.74– 1.82 mm; width of pronotum: 2.78–2.84 mm; suture length: 4.80–4.89 mm; width of elytra: 3.68–3.74 mm; dorsoventral eye length: 0.16–0.20 mm; interocular distance: 0.96–1.08 mm; antennae segment (1–11) length (in millimeter): 0.32: 0.16: 0.24: 0.16: 0.16: 0.16: 0.16: 0.16: 0.16: 0.20: 0.36 ( Fig. 4 C).

Remarks. Members of this new species are similar to those of Chrysolina claripes Lopatin , but they can be distinguished by the colour on dorsum, punctures on lateral side of pronotum, and shape of median lobe.

Type material. Holotype: China: Sichuan: Hongyuan, 3500–3600 m, 28 August 1983, leg. Rui-Qi Wang. Paratypes: 1 male, Sichuan: Hongyuan Longriba, 3600 m, 25 August 1983, leg. Shu-Yong Wang ( IZAS); 1 male ( BMNH), 1 male and 1 female (HKc), 4 males and 1 female (MDc), 1 male and 1 female ( IZAS), N. Sichuan: Hongyuan, 4200 m, 21 July to 0 3 August 1981, leg. J. Kalab; 2 males (MDc), China: Hongyuan, 4200 m, July, 1989, leg. Kalàb; 1 male and 2 females (MDc), 1 female (HKc), China. N. Sichuan prov. Hongyuan. ca. 4200 m, 21.VII–3.VIII.1991., leg. J. Kalàb.

Distribution. Sichuan (Fig. 8).

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

Figures

FIGURE 4. Chrysolina hongyuanensis, sp. nov. A. Habitus; B. Left antenna (male); C. Left antenna (female); D. Aedeagus, lateral view; E. Aedeagus apex, dorsal view; F. Tarsus, male; scale bar: 1.0 mm.