Liroetis obliquevirgatus Lopatin, 2013

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 : 593-594

Liroetis obliquevirgatus Lopatin, 2013

( Figs 287–290 , 294 )

Liroëtis obliquevirgata Lopatin, 2013: 771 (original description).

Liroëtis obliquevirgata : YൺඇǤ et al. (2015): 249 (noted).

Type locality. ‘[ China:] Sichuan Province, near pass btw. Pingchuan & Yanyuan, 27°31′16″N 101°44′07″E’.

Type material examined. Hඈඅඈඍඒඉൾ:J ( Figs 287–290 ),‘ China, Sichuan Prov., near / pass btw Pingchuan& Yanyuan / 27 31 16 N / 101 44 07 E / H= 3555 m, 21.07.2011 / Belousov, Kabak leg. [w, p] // Holotypus [r, h] // Liroëtis / obliquevirgatus / sp. n. [h] / det. I. Lopatin, 201 [p] 2 [w, h]’ ( ZIN).

Diagnosis. Colouration. Dorsal side pale brown, vertex black medially and laterally, pronotum with three black spots (middle heart-shaped, two lateral elongate), scutellum brown, each elytron with small black spot on humeral callus, three preapical small black spots in transverse row and large oblique median spot not touching suture. Antennae black with reddish antennomeres I and II. Legs brown to black. Prosternum pale brown, mesosternum pale in middle and darkened laterally, metasternum almost black with brown anterior margin, abdomen pale brown with darkened patches.

Body length. J: 8.9 mm (holotype).

Male ( Figs 287–289 ). Dorsum dull.Antennae 0.68 times as long as body. Pronotum 1.62 times as wide as long, covered with distinct punctures, anterior margin straight with thin border, lateral margins rounded in anterior half, straight and convergent posteriorly, anterior angles pronounced to distinct teeth. Middle part of posterior margin of abdominal ventrite IV obliquely impressed, with small median U-shaped incision. Last abdominal ventrite with median longitudinal impression constricted before base. Protarsomere I subtriangular, metatibial spur absent.

Aedeagus ( Fig. 294 ). Median lobe of aedeagus 4.86 times as long as wide; apical third narrower, parallel, with distinct very narrow median furrow, apex rounded, strongly folded down; basal two thirds wider, slightly convergent basally. Lateral view: median lobe almost straight (except for turned apex and base); lateral elevation small, subtriangular with rounded tip, placed in anterior two fifths of aedeagus length; ventral side with small angulation subapically. Dorsal process 5.93 times as long as wide, 0.65 times as long as median lobe; narrow, subparallel, slightly wider subapically. Lateral view: dorsal process narrow, almost straight, with bent apical part, apical part with triangular lamela ventrally.

Female unknown.

Differential diagnosis. Liroetis obliquevirgatus differs from almost all other representatives of L. grandis speciesgroup by presence of additional wide oblique black stripe on each elytron, not connected at elytral suture ( Fig. 287 ). Similar elytral pattern can be found only in L. nigropictus which has wide median transverse black band prolonged anteriorly along elytral suture towards scutellum, and black pronotum ( Fig. 282 ).

Distribution. China: Sichuan (Lඈඉൺඍංඇ 2013).

Figures

Figs 287–290. Liroetis obliquevirgatus Lopatin, 2013, male, holotype (8.9 mm). 287 – dorsal view; 288 – ventral view; 289 – lateral view; 290 – labels.

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 282–286. Liroetis nigropictus (Fairmaire, 1889), male, syntype (8.8 mm). 282 – dorsal view; 283 – ventral view; 284 – lateral view; 285 – head and pronotum; 286 – labels.