Chrysolina (Pezocrosita) kozlovi Lopatin, 1988

Ge, Si-Qin, Daccordi, Mauro & Yang, Xing-Ke, 2009, Two new species of Chrysolina Motschulsky from China, with redescription of C. kozlovi Lopatin and notes on the genus Doeberlia Warchałowski (Coleoptera: Chrysomelidae: Chrysomelinae), Acta Entomologica Musei Nationalis Pragae 49 (2), pp. 805-818 : 812-816

Chrysolina (Pezocrosita) kozlovi Lopatin, 1988

( Figs. 17–28 )

Chrysolina (Pezocrosita) kozlovi Lopatin, 1988: 586 .

Type locality. China, Qinghai, river Chok-Chu.

Type material examined. HOLOTYPE: J, River Chok-Chu, at the end of August 1900, 11– 12000 feet [translated from Russian] / Chrysolina (Pezocrosita) kozlovi , sp. n., det. I. Lopatin ( ZIN).

Additional material examined. CHINA: QINGHAI: Nangqén , 3700 m, 7.vi.1965, 56 JJ 45 ♀♀, leg. Shuyong Wang ( IZAS, 1J MDc) ; Yushu , 3750 m, 30.vii. 1960, 16 JJ 15 ♀♀, leg. Shuyong Wang ( IZAS) ; Road Toramarkog – Nangqén , 30 km N Nangqén, ca. 3500 m, 24.vi.1995, 14 JJ 8 ♀♀, leg. Rejsek ( MDc) ; 20 km N Nangqén , cultural steppe, ca. 3300 m ; 32°16´N 96°29´E, 5–6.vii.1995, 17JJ 11♀♀, leg. J. Turna ( MDc) ; Road Toramarkog, Nangqén Valley , 26–27.vi.1995, 1 J 2 ♀♀, leg. J. Kaláb ( MDc) . TIBET: Mila , 4600–4800 m, 15 km S of Bangda, 20.vi.1997, 4 JJ 3 ♀♀, leg. A. Wrzecianko ( MDc) ; Bachen Nala 2 km W, 4100 m, 7.vii.1995, 1 ♀, leg. S. Dacatra ( MDc) .

Diagnosis. Aeruginous with metallic purple; hind wing absent; pronotum lacking setigerous punctures on both anterior and posterior corners, disc with deep lateral longitudinal depression from base until middle part of pronotum, with dense punctures in depression near lateral side; elytra with regular separate striae, inner edge of epipleuron with bristles along apical third of its length; hind tarsomere 3 complete, entirely pubescent beneath in male and pubescent ventro-laterally in female; pygidium with arcuate apex and long, deep, longitudinal median depression.

Redescription. Colour. Head, pronotum, scutellum, and elytra aeruginous with metallic purple; eyes dark brown; antennae yellowish brown, legs yellowish brown; labrum and underside of body reddish brown; mandible yellowish brown, apical part black; maxillary and labial palpi and underside of head yellowish brown.

Body. Length: 4.56–5.76 mm; width: 3.04–3.60 mm; ovoid, moderately large, convex in lateral view. Hind wings absent ( Fig. 17 ).

Head. Anterofrontal ridge sinuous; clypeus trapezoidal, with small, sparse punctures and sparse pubescence, base not raised; middle part of labrum incised; frons smooth, with sparse, small punctures; coronal suture present, frontal suture absent; vertex with sparse and small punctures; eyes elliptic, dorso-ventral eye length 0.24–0.32 mm, interocular distance 1.28–1.36 mm; mandible strong, outer surface with sparse pubescence; maxillary palpomere 3 shorter than palpomere 4, apex of the latter truncate. Antennae exceeding base of elytra; subapical segments flattened, broader than long; lengths of antennomeres 1–11 (in mm): 0.24–0.28: 0.16: 0.16: 0.16: 0.12–0.14: 0.12–0.14: 0.12–0.14: 0.12–0.14: 0.16: 0.16–0.20: 0.24–0.28 ( Figs. 18, 19 ).

Prothorax. Length: 1.44–1.68 mm; width: 2.96–3.20 mm. Cilia on anterior margin of pronotum present, anterior margin and posterior margin bordered; lateral margin not strongly dilated anterior to middle, barely visible from above and lacking setigerous punctures on both anterior and posterior corners; punctures on central part small and sparse, same as those on head; punctures lateral to disc much larger and denser; disc with deep lateral longitudinal depression from base until middle part of pronotum, with dense punctures in depression near lateral side.

Scutellum. Half-rounded, with sparse punctures.

Elytra. Length along suture: 4.08–4.64 mm; combined width: 3.44–4.24 mm. Humeral calli present; elytra with regular separate striae, sutural striole present, punctures larger than those on side of pronotum; interstrial punctures small and sparse, shargeened especially in apical third. Epipleuron horizontal, smooth, outer edge sharp, inner edge of epipleuron with bristles along apical third of its length.

Legs. Apices of all tibiae not expanded externally; hind tarsomere 3 complete and entirely pubescent beneath and with shallow emargination in male ( Fig. 20 ), pubescent ventro-laterally in female; relative lengths of hind tarsomeres: 5>1>3>2, tarsomere 5 not ventrally toothed; tarsal claws simple.

Venter. Hypomeron without punctures and without notopleural suture; cilia present on anterior margin of prosternum; middle part of intercoxal prosternal process more than half as wide as apex; prosternum, mesoventrite and metaventrite with moderate and sparse punctures; prosternum truncate posteriorly, not emarginate; anterior coxal cavities open posteriorly; mesoventrite shorter than prosternum between coxae; intercoxal process of metaventrite bordered and truncate anteriorly, metaventrite shorter than prosternum; mesepisternum, mesepimeron and metepisternum with small and sparse punctures; abdominal ventrites with moderate and sparse punctures; ventrite 1 without carina, last ventrite of male slightly sinuated on either side of middle of apex; pygidium deeply grooved medially, with arcuate apex.

Median lobe of aedeagus ( Figs. 21–28 ). Basal part of median lobe little narrower than apical part, base not fissured, flagellum well developed, cross-shaped before apex ( Figs. 21, 23, 25, 27 ).

Females slightly larger and broader, but not significantly different from males; punctures of pronotum denser than in males; fore tarsomere 1 much thinner and more slender than in males. Spermatheca absent.

Larva. Chrysolina kozlovi is most likely viviparous: we have found well-developed firstinstar larvae inside the abdomen of one mature female. The larvae have typical characters of Chrysolina : body convex, yellowish brown, head darker; body length: 1.06–1.28 mm; body covered with setae all over the surface; antennae, mouthparts and stemmata well developed; abdomen without pygopod; meso- and metathorax and abdominal segment 1 with a pair of egg bursters; tubercles unclear or not developed; claws simple.

Variability. All males of the type series are very similar in size, shape and lustre. The shape of the aedeagus, however, slightly differs in specimens from different localities and even in different specimens from the same locality ( Figs. 21–28 ). In some specimens, the elytral punctures are not very clear and the lateral depression of pronotum are complete along the whole pronotal length. In two specimens examined, the body colour is violet; another specimen is dark green with a violet reflection on the pronotum.

Discussion. We consider a redescription of C. kozlovi necessary because of its remarkable variability. The shape of the aedeagus varies between different localities as well as between specimens from the same locality. Such phenomenon has been indicated only for a few other species ( BIEŃKOWSKI 1998, KIPPENBERG 2004). Further studies are necessary to understand possible subspecific structure of C. kozlovi in the alpine regions of southwestern China.

Remarks. Chrysolina (Pezocrosita) kozlovi Lopatin is somewhat similar to C. (P.) yupeiyuae Lopatin, 1998 for the punctures of pronotum and elytra and the coloration of the body, but differs in the morphology of the aedeagus.

Distribution. China: Qinghai and Tibet.

Figures

Figs. 17–28. Chrysolina (Pezocrosita) kozlovi Lopatin, 1988. 17 – habitus; 18 – antenna, male; 19 – antenna, female; 20 – fore tarsus, male, dorsal view; 21 – aedeagus, dorsal view (specimen from Qinghai, Nangqén, 3700 m); 22 – aedeagus (same specimen as in Fig. 21), lateral view; 23 – aedeagus, dorsal view (specimen from Tibet, Mila); 24 – aedeagus (same specimen as in Fig. 23), lateral view; 25 – aedeagus, dorsal view (specimen from southeastern Qinghai, road Toramarkog-Nangqén); 26 – aedeagus, lateral view (same specimen as in Fig. 25); 27 – aedeagus, dorsal view (specimen from southern Qinghai, 20 km north of Nangqén); 28 – aedeagus, lateral view (same specimen as in Fig. 27).