Liroetis nigriceps ( Laboissière, 1929 ) 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 : 582

Liroetis nigriceps ( Laboissière, 1929) comb. nov.

( Figs 193 , 205 , 216 , 239–244 )

Pseudoliroetis nigriceps Laboissière, 1929: 282 (original description).

Pseudoliroetis nigriceps : Gඋൾඌඌංඍඍ & Kංආඈඍඈ (1963):530 (key); Wංඅർඈඑ (1973): 478 (catalogue).

Pseudoliroëtis nigriceps: OǤ අඈൻඅංඇ (1936): 206 (description).

Siemssenius nigriceps: ZIJ ൺඇǤ et al. (2008b): 127 (key); Bൾൾඇൾඇ (2010): 488 (catalogue); YൺඇǤ et al. (2015): 251 (key), 252 (noted).

Type locality. ‘Thibet: Moupin [= China, Sichuan Province, Baoxing]’. Type material examined. Sඒඇඍඒඉൾ: 1 J ( Figs 239–242 ), ‘MUS. HIST. NAT. / A. DAVID / Moupin (Thibet) / 1871 [w, p] // TYPE [p, red letters] / J [w, h] // Pseudoliroetis / nigriceps / m [h] / V. Laboissière – Dét. [w, p] // Le Moult vend. / via Reinbek / Eing. Nr. 1, 1957 [w, p]’ ( ZMUH); 1 ♀, ‘MUS. HIST. NAT. / A. DAVID / Moupin (Thibet) / 1871 [w, p] // TYPE [red letters, w, p] // Pseudoliroetis / nigriceps / m [h] / V. Laboissière – Dét. [w, p]’ ( MNHN); 1 ♀, ‘MUS. HIST. NAT. / A. DAVID / Moupin (Thibet) / 1871 [w, p] // Pseudoliroetis / nigriceps / m [h] / V. Laboissière – Dét. [w, p]’ ( MNHN).

Additional material examined. CHINA: GඎංඓΗඈඎ: ‘Kiautschau’, 1 J ( NHMB – Frey coll.); Leishan Co., SE Kli, NE Leishan, Leigong Shan, E slope, env. of pass between Leishan and Fangxiang, 26°22.74′N 108°12.99′E, 1700–1800 m, 14.–24.vi.2001, 1 J 2♀♀, H. Schillhammer leg. ( NHMW). SංർΗඎൺඇ: Bifeng env., 30°04.112′N 102°59.427′E, 1140 m, 17.–24.v.2017, 2 JJ, W. Grosser leg. ( JBCB).

Diagnosis. Colouration. Head black with brownish vertex, pronotum, scutellum, elytra and abdomen pale brown, meso- and metaventrite, antennae and legs black. The specimens from Guizhou have pale brown head and underside.

Body length. JJ: 9.5–10.9 mm, ♀♀: 10.1–11.1 mm.

Male ( Figs 243–244 ). Antennae 0.79 times as long as body. Pronotum convex, 1.72 times as wide as long, almost impunctate, anterior margin nearly straight, unbordered, posterior margin rounded, thinly bordered, lateral margins with wider border. Posterior margin of abdominal ventrite IV with two obliquely impressed transverse triangular processes separated by U-shaped incision. Longitudinal impression on last abdominal ventrite very wide and deep, narrowed basally. Pygidium with triangularly pointed apex. Protarsomere I parallel. Metatibial spur wide, flat, with oblique apex.

Aedeagus ( Fig. 193 ). Median lobe of aedeagus 3.76 times as long as wide; apical eighth narrow, parallel, rest wide, slightly narrowed in apical 2/8, basal 3/4 slightly convergent anteriorly. Lateral view: median lobe bisinuate; lateral elevation high, triangular, placed in anterior fifth of aedeagus length. Dorsal process 5.21 times as long as wide, 0.84 times as long as median lobe; apical two thirds elongate oval, apex sharp, basal third narrower, parallel. Lateral view: ventral side of dorsal process regularly widely rounded, dorsal side with distinct hump behind middle.

Female. Metatibial spur present, thin and sharp. Sternite VIII subsemicircular, posterior margin with small wide triangular incision followed by short keel, surface laterally with two elevated plates, long setae accumulated along posterior and inner margins of those plates, one isolated seta placed in middle of lateral part, middle part of surface with W-shaped impression; tignum 0.40 times as long as sternite VIII, narrow, asymmetrical, directed slightly to left ( Fig. 216 ). Spermatheca with slightly indicated nodulus covered with fine wrinkles, cornu C-shaped, gradually narrowed towards sharp apex, spermathecal duct relatively long, straight basally and bent apically ( Fig. 205 ).

Differential diagnosis. Liroetis nigriceps differs from similar L. fulvipennis in black or dark head and presence of metatibial spur in females (head brown and metatibial spur absent in females in L. fulvipennis ). Dorsal process of aedeagus is wider and subparallel in anterior two thirds in L. nigriceps but widest in middle in L. fulvipennis ( Figs 187 , 193 ). Another similar species, L. jeanvoinei , has dorsum reddish brown and median lobe of aedeagus almost parallel, with dorsal process very narrow and parallel ( Fig. 188 ).

Distribution. China: Sichuan (Lൺൻඈංඌඌංජඋൾ 1929, present paper), Guizhou (present paper).

Figures

Figs 193–196. Aedeagus of Liroetis, dorsal and lateral views. 193 – L. nigriceps (Laboissière, 1929); 194 – L. rufipennis (Chûjô, 1962); 195 – L. sulcipennis (Zhang & Yang, 2008); 196 – L. tsoui (Lee, 2016). 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 239–244. Liroetis nigriceps (Laboissière, 1929). 239–242 – Male, syntype (9.5 mm). 239 – dorsal view; 240 – ventral view; 241 – head and pronotum; 242 – labels. 243–244 – Male (10.3 mm). 243 – dorsal view; 244 – lateral view.

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.