Liroetis humeralis 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 : 552

Liroetis humeralis Jiang, 1988

( Figs 83–86 , 109 , 119, 126 )

Liroetis humeralis Jiang, 1988: 192 , 197 (original description).

Liroetis humeralis : JංൺඇǤ (1992): 658 (noted); Bൾൾඇൾඇ (2010): 478 (catalogue); YൺඇǤ et al. (2015): 247 (key), 248 (noted).

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

Type material. Not examined.

Additional material examined. CHINA: Yඎඇඇൺඇ: Nujiang pref., Gongshan County, Gaoligong Shan, Danzhu He drainage, N 27.63063 E 98.62074, 2700 m, 30.vi.–5.vii.2000, 1 J, D.H. Kavanaugh, C.E.Griswold, H.-B. Liang, D. Ubick & D.-Z. Dong leg. ( IZAS); Deqen, Weixi, Dewei Line right trib. of Mekong R. W. of Ye Se Eli vill., 27°40′45″N 98°56′50″E, 2520 m, 18.vii.2016, 1 J, Belousov, Kabak & Davidian leg. ( PRCS); Deqen, Weixi, Dewei Line right trib. of Mekong R. W. of Ye Se Eli vill., 27°41′03″N 98°56′39″E, 2305 m, 17.vii.2016, 1 ♀, Belousov, Kabak & Davidian leg. ( PRCS).

Diagnosis. Colouration. Head and pronotum orange; scutellum dark brown; elytra yellow with large median rhomboidal black spot with irregular margins, apical process reaching scutellum, lateral margin black in anterior half of elytra and connected with rhomboidal spot, extreme elytral suture pale, epipleura yellow. Antennae black except for brownish antennomere I. Legs with pale coxae and trochanters, femora brownish, tibiae and tarsi brownish black. Ventral side: prosternum orange, meso- and metasternum brown, abdomen brown with darkened median parts of ventrites I–IV.

Body length. JJ: 9.0– 9.2 mm, ♀: 10.0 mm (J ♀: 8.4–11.0 mm based on the original description).

Male ( Figs 83–85 ). Antennae 0.86 times as long as body. Pronotum 1.52 times as wide as long, lustrous, impunctate, anterior margin slightly concave with complete well visible border, lateral margins parallel in basal two thirds, convergent in anterior third. Posterior margin of abdominal ventrite IV with small V-shaped incision, surface around incision impressed and oblique. Last abdominal ventrite with longitudinal impression narrower in middle part. Pygidium with distinct keel. Metatibial spur absent.

Aedeagus ( Fig. 109 ). Median lobe of aedeagus 4.67 times as long as wide; apical fifth narrower, parallel, median lobe widest before middle, slightly convergent basally. Lateral view: median lobe moderately bent throughout whole length; lateral elevation triangular with rounded apex, placed in anterior 2/5 of aedeagus length. Dorsal process 7.28 times as long as wide, 0.70 times as long as median lobe; narrow, subparallel, widest in apical part, slightly convergent basally, apex sharp, triangular. Lateral view: dorsal process slender and regularly bent, ventral side of apical part with keel with irregular denticulation.

Female ( Fig. 86 ). Metatibial spur absent. Sternite VIII transversely oval with shallow emargination in middle of posterior margin, surface with shallow U-shaped impression in middle of posterior part, with asymmetricaly placed two pairs of long setae; tignum asymmetrical, slightly oblique and placed more left, 0.68 as long as sternite VIII ( Fig. 126 ). Spermatheca with well developed transversely oval nodulus, cornu nearly circular, gradually narrowing towards apex, spermathecal duct bent ( Fig. 119 ).

Differential diagnosis. Liroetis humeralis is unique within the genus in having elytra with large median rhomboidal black spot with irregular margins ( Figs 83, 86 ) (see also drawing in JංൺඇǤ 1988).

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

Figures

Figs 83–86.Liroetis humeralis Jiang, 1988. 83–86.Male, 9.3 mm.83 – dorsal view; 84 – ventral view; 85 – lateral view.86 – Female, 10.1 mm, dorsal view.

Figs 108–117.Aedeagus of Liroetis, dorsal and lateral views. 108 – L. flavipennis Bryant, 1954; 109 – L. humeralis Jiang, 1988; 110 – L. lonicernis Jiang, 1988; 111 – L. medvedevi nom. nov.; 112 – L. nepalensis Chûjô, 1966; 113 – L. prominensis Jiang, 1988; 114 – L. sichuanensis Jiang, 1988; 115 – L. tibetanus Jiang, 1988; 116 – L. tibialis Jiang, 1988; 117 – L. zhongdianicus Jiang, 1988. Figs 116–117 reproduced from JංൺඇǤ (1988). Scale 0.5 mm.

Figs 118–131. Spermatheca (Figs 118–124) and sternite VII (Figs 125–131) of Liroetis. 118, 125 – L. flavipennis Bryant, 1954; 119, 126 – L. humeralis Jiang, 1988; 120, 127 – L. medvedevi nom. nov.; 121, 128 – L. nepalensis Chûjô, 1966; 122, 129 – L. sichuanensis Jiang, 1988; 123, 130 – L. tibetanus Jiang, 1988; 124, 131 – L. zhongdianicus Jiang, 1988. Scales 0.25 mm for Figs 118–124, 0.5 mm for Figs 125–131.