Liroetis yulongnis Jiang, 1988

Bezděk, Jan, 2021, Redefinition of Liroetis, with descriptions of two new species and an annotated list of species (Coleoptera: Chrysomelidae: Galerucinae), Acta Entomologica Musei Nationalis Pragae 61 (2), pp. 529-614 : 601-603

Liroetis yulongnis Jiang, 1988

( Figs 298 , 304, 310 , 326–332 )

Liroetis yulongnis Jiang, 1988: 193 , 198 (original description).

Liroetis yulongnis :JංൺඇǤ (1992): 658 (noted); Bൾൾඇൾඇ (2010): 479 (catalogue); YൺඇǤ et al. (2015): 248 (key), 250 (noted).

Type locality. ‘[ China:] Yunnan: Lijiang’.

Type material examined. Pൺඋൺඍඒඉൾ:1 J ( Figs 326–329 ), ‘[Yunnan, Lijiang, Mt.Yulong / 3200 m / Chinese Academy of Sciences] [in Chinese, w, combined p and h] // [1984.VII.15. / Collector Shu-Yong Wang] [in Chinese, w, combined p and h] // PARATYPE [y, p] // IOZ(E)1967858 [w, p] // Liroetis / yulongnis Jiang 1988 / Det.Jiang Shengqiao [w, p]’ ( IZAS). Additional material examined. CHINA: Yඎඇඇൺඇ: Yulong Xueshan, N of Lijiang, Yungshanping, 3100–3300 m, 25.vii.2006, 1 J, T. Tichý leg. ( JBCB); Daju, 50 km N of Lijiang, 27.vi.1992, 1 ♀, E.Jendek leg. ( JBCB); Yulongxueshan NP, near Baishui, ca. 30 km N of Lijiang, 2900–3200 m, 7.–11.vii.1994, 1 J, H.Schilhammer leg. ( NHMW); Lijiang,Yulongshan, 27°08′20″N 100°14′06″E, 2800 m, 29.v.2002, 1 J, A. Konstantinov & M.Volkovitsh leg.( USNM);Yulongshan NP, 27°10.096′N 100°14.631′E, 3445 m, 27.vii.2011, 1 J, A.Konstantinov leg. ( USNM); Lijang, 27.–28. vi.1996, 1 J 1 ♀, without collector’s name ( RBCN).

Diagnosis. Colouration. Head dark brown, vertex with basal median and two lateral black spots. Pronotum dark brown with five black spots in transverse row: large heart- -shaped middle spot, nearby two large elongate spots and laterally two very small spots. Scutellum black. Elytra brown, each elytron with one black spot on humeral callus and three preapical black spots in transverse row (inner spot largest). Ventral side black, abdomen variable (completely pale brown, black with brown lateral margins or black except for brown last ventrite. Legs and antennae black.

Body length. JJ: 9.2–9.6 mm, ♀♀: 9.3–12.0 mm (J ♀: 8.5–11.0 mm based on the original description).

Male ( Figs 326–328, 330–331 ). Antennae 0.64 times as long as body. Pronotum subquadrangular, 1.54 times as wide as long, lustrous, distinctly punctate, anterior margin slightly concave, thinly bordered, lateral margins with wide border, posterior margin bisinuate, thinly bordered, anterior angles swollen and pointed. Scutellum impunctate. Middle part of posterior margin of abdominal ventrite IV vertically impressed, with small incision in middle. Longitudinal impression on last abdominal ventrite constricted in middle part. Protarsomere I wide, elongate subpentagonal. Metatibial spur absent.

Aedeagus ( Fig. 298 ). Median lobe of aedeagus 5.10 times as long as wide; apical quarter subparallel, laterally with small angulation, apex rounded, strongly folded down, rest of median lobe slightly wider, widest in middle part. Lateral view: apical two thirds almost straight, basal third rounded; lateral elevation low and rounded, placed in anterior 2/5 of aedeagus length. Dorsal process 6.68 times as long as wide, 0.70 times as long as median lobe; narrow, apical part widest, apex triangular, sharp. Lateral view: dorsal process narrow, regularly rounded, ventral side subapically with distinct keel.

Female ( Fig. 332 ). Sternite VIII heart-shaped, posterior margin shallowly emarginated in middle, surface with shallow U-shaped impression in middle of posterior half; long setae accumulated laterally along posterior margins; tignum 0.50 times as long as sternite VIII, slightly constricted before apex ( Fig. 310 ). Spermatheca with well developed sphaerical nodulus, cornu short, only slightly bent, spermathecal duct moderately bent ( Fig. 304 ).

Differential diagnosis. Having black legs and black pattern on densely punctate pronotum, Liroetis yulongnis is very similar to L. octopunctatus . Both species can be distinguished by the shape of dorsal process of aedeagus which is distinctly wider, 6.68 times as long as wide in L. yulongnis ( Fig. 298 ) but extremely narrow, 9.30 times as long as wide, in L. octopunctatus ( Fig. 295 ). Liroetis yulongnis is on average larger (8.5–11.0 mm), while L. octopunctatus is smaller (7.3–8.8 mm). Similarly coloured L. alticola differs in lustrous pronotum covered with very fine punctures.

Distribution. China: Yunnan (JංൺඇǤ 1988, present paper).

Figures

Figs 291–298. Aedeagus of Liroetis, dorsal and lateral views, apex of dorsal process in frontal view. 291 – L. alticola Jiang, 1988; 292 – L. apicalis Gressitt & Kimoto, 1963; 293 – L. nigropictus (Fairmaire, 1889); 294 – L. obliquevirgatus Lopatin, 2013; 295 – L. octopunctatus (Weise, 1889); 296 – L. paragrandis Jiang, 1988; 297 – L. suwai (Takizawa, 1988); 298 – L. yulongnis Jiang, 1988. Scale 0.5 mm.

Figs 299–310. Spermatheca (Figs 299–304) and sternite VII (Figs 305–310) of Liroetis. 299, 305 – L. alticola Jiang, 1988; 300, 306 – L. apicalis Gressitt & Kimoto, 1963; 301, 307 – L. octopunctatus (Weise, 1889); 302, 308 – L. paragrandis Jiang, 1988; 303, 309 – L. suwai (Takizawa, 1988); 304, 310 – L. yulongnis Jiang, 1988. Scales 0.25 mm for Figs 299–304, 0.5 mm for Figs 305–310.

Figs 326–332. Liroetis yulongnis Jiang, 1988.326–329 – Male, paratype (9.2 mm).326 – dorsal view; 327 – ventral view; 328 – lateral view; 329 – labels. 330–331 – Male (10.1 mm): 330 – dorsal view; 331 – head and pronotum. 332 – Female (12.0 mm).