Liroetis cheni (Lee, 2016) Bezděk, 2021

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 : 566

Liroetis cheni (Lee, 2016) comb. nov.

( Figs 160–163 , 185 , 198 , 209 )

Siemssenius cheni Lee, 2016: 368 (original description).

Type locality. ‘[ Taiwan:] Taitung county, Hsiangyang’.

Type material examined. Pൺඋൺඍඒඉൾ: 1 J ( Figs 160–163 ), ‘ Taiwan: Taitung (20427) / Hsiangyang ([in Chinese]) / 20.VI.2011, leg. C.-F. Lee [w, p] // Paratypus / Siemssenius / cheni sp. nov. [p] J [h] / des. C.-F. Lee, 2016 [pink label, p]’ ( JBCB).

Diagnosis. Colouration. Head, scutellum and elytra black. Pronotum and underside yellow. Antennae black with last four antennomeres gradually paler. Legs yellow with apices of femora, tibiae and tarsi black.

Body length. J: 7.4 mm (J ♀: 8.2–9.6 mm based on the original description).

Male ( Figs 160–162 ). Antennae 0.92 times as long as body. Pronotum convex, 1.62 times as wide as long, finely punctate, anterior margin concave, unbordered, posterior margin straight in middle part, oblique laterally, thinly bordered, lateral margins straight and parallel in posterior two thirds, anterior third rounded and convergent, with wider border. Posterior margin of abdominal ventrite IV with two small transverse triangular processes separated by U-shaped incision. Longitudinal impression on last abdominal ventrite wide, parallel, convergent basally. Protarsomere I elongate subtriangular. Metatibial spur thin.

Aedeagus ( Fig. 185 ). Median lobe of aedeagus 2.98 times as long as wide, with apical process slightly divergent, then gradually widened towards base. Lateral view: median lobe straight in middle and apical parts; lateral elevation low, rounded, placed in anterior fifth of aedeagus length. Dorsal process 5.81 times as long as wide, 0.92 times as long as median lobe, with triangular apex, apical part with shallowly emarginated sides. Lateral view: dorsal process very wide in apical half, narrow in basal half.

Female. Sternite VIII wide, transversely suboval, posterior margin shallowly emarginated, surface laterally with two elevated plates, long setae accumulated along posterior and inner margins of those plates, tignum short, 0.25 times as long as sternite VIII, slightly asymmetrical to right ( Fig. 209 ). Spermatheca without visible nodulus, cornu C-shaped, apical part longer and narrower than basal part, spermathecal duct sinuate ( Fig. 198 ).

Differential diagnosis. Liroetis cheni is very close to L. metallipennis . Both species differ in the colouration of elytra which are black with metallic tint in L. cheni but metallic greenish or purplish bronze in L. metallipennis . Aedeagi of both species are very similar ( Figs 185 , 191 ). Host plant. Caprifoliaceae : Lonicera acuminata Wall. (Lൾൾ 2016).

Distribution. Taiwan (Lൾൾ 2016).

Figures

Figs 160–163. Liroetis cheni (Lee, 2016), male, paratype (7.4 mm). 160 – dorsal view; 161 – lateral view; 162 – head and pronotum; 163 – labels.

Figs 185–188.Aedeagus of Liroetis, dorsal and lateral views.185 – L. cheni (Lee, 2016); 186 – L. elongatus (Kimoto, 1977); 187 – L. fulvipennis Jacoby, 1890; 188 – L. jeanvoinei (Laboissière, 1929). Scale 0.5 mm.

Figs 197–208. 197 – Aedeagus of Liroetis yuae (Lee, 2016), dorsal and lateral views. 198–208 – Spermatheca. 198 – L. cheni (Lee, 2016); 199 – L. fulvipennis Jacoby, 1890; 200 – L. jeanvoinei (Laboissière, 1929); 201 – L. jungchani (Lee, 2016); 202 – L. liui (Lee, 2016); 203 – L. metallipennis (Chûjô, 1962); 204 – L. modestus (Weise, 1922); 205 – L. nigriceps (Laboissière, 1929); 206 – L. rufipennis (Chûjô, 1962); 207 – L. tsoui (Lee, 2016); 208 – L. yuae (Lee, 2016). Figs 198, 201–203, 207–208 reproduced from Lൾൾ (2016). Scales: 0.5 mm for Fig. 197, 0.25 mm for Figs 198–208.

Figs 209–219.Sternite VIII.209 – L. cheni (Lee, 2016); 210 – L. fulvipennis Jacoby,1890; 211 – L.jeanvoinei (Laboissière, 1929); 212 – L. jungchani (Lee, 2016); 213 – L. liui (Lee, 2016); 214 – L. metallipennis (Chûjô, 1962); 215 – L. modestus (Weise, 1922); 216 – L. nigriceps (Laboissière, 1929); 217 – L. rufipennis (Chûjô, 1962); 218 – L. tsoui (Lee, 2016); 219 – L. yuae (Lee, 2016). Figs 209, 212–214, 218–219 reproduced from Lൾൾ (2016). Scale 0.5 mm.

Figs 189–192. Aedeagus of Liroetis, dorsal and lateral views. 189 – L. jungchani (Lee, 2016); 190 – L. liui (Lee, 2016); 191 – L. metallipennis (Chûjô, 1962); 192 – L. modestus (Weise, 1922). Scale 0.5 mm.