Mimastra oblonga (Gyllenhal, 1808) Bezděk, 2011

Bezděk, Jan, 2011, Revisional study on the genus Mimastra (Coleoptera: Chrysomelidae: Galerucinae). Part 3: Mimastra oblonga and M. tarsalis species groups, Zootaxa 2766, pp. 30-56 : 32-33

Mimastra oblonga (Gyllenhal, 1808) , new combination

( Figs 1–2, 10–11, 18–20, 28, 36, 44, 57)

Galleruca oblonga Gyllenhal in Schönherr, 1808: 295 (original description).

Raphidopalpa oblonga: Chevrolat, 1836: 378 (catalogue, attributed to Schönherr); Chevrolat, 1837: 402 (catalogue, attributed to Schönherr).

Aulacophora oblonga: Gemminger & von Harold, 1876: 3558 (catalogue); Wilcox, 1971: 243 (catalogue).

Ceratia (Orthaulaca) oblonga: Weise, 1924: 15 (catalogue).

Phyllobrotica lunata: Fairmaire, 1888: 43 (partim).

Mimastra cyanura: Ogloblin, 1936: 178 (key), 179, 400 (partim); Yang, 1995: 260; Aston, 2009: 17.

Mimastra soreli Baly, 1878: 415 (original description, partim).

Mimastra soreli: Weise, 1922: 78 ; Ogloblin, 1936: 177 (key), 178, 400 (partim); Yang, 1992: 571; Yang, 1993: 339; Li & Yang, 2002: 302; Zhang et al. 2006: 205 (key, partim?); Aston, 2009: 17.

Type locality. “ India Orientali ” .

Type material. Lectotype ♂ ( NHRS), designated here, labelled: “ India Or. / D. Kymell [w, h]” . Paralectotype: 1 ♀ ( NHRS), same label data as lectotype. The specimens are provided with one red printed label: “LECTOTY- PUS, [or PARALECTOTYPUS,] / Galleruca oblonga / Gyllenhal, 1808, / des. J. Bezděk 2010 ” .

Additional material studied. 105 specimens — CHINA: FUJIAN : 3♂♂ 4♀♀, Foochow [= Fuzhou], C. R. Kellog leg. ( BMNH, USNM) ; 11♂♂ 23♀♀, Foochow [= Fuzhou], 1935-1936, M. S. Yang leg. ( BMNH) ; 2♂♂, Fou-Tscheou [= Fuzhou], without additional data ( NMPC) , 4♀♀, Fukien , C. R. Kellog leg. ( USNM) ; 4♂♂ 1♀, Fokien prov. , 1.iv.1914, G. Siemssen leg. ( USNM) ; 1♀, Fokien prov. , 14.xi.1903, G. Siemssen leg. ( USNM) ; 2♀♀, Fokien prov. , 8.ix.1911, G. Siemssen leg. ( USNM) ; 1♀, Hingwa , W. B. Cole leg. ( USNM) ; 1♂, Ting-hai , vi.1899, P. de la Garde leg. ( BMNH) ; 2♀♀, Shaowu env., 13.-16.vi.1991, without the name of collector ( MDAG) . GUANGXI: 1♂ 1♀, Guilin , v.1980, without the name of collector (Voříšek coll.) . HUNAN: 2♂♂, Guidong env., 2604´ N 11356 ´E, 26.-31.v.1994, Šauša & Jendek leg. ( FKCC, JBBC) ; 3♂♂ 1♀, Dalongshan Mts., Xin Hua , 1600 m, vii.2004, Jing leg. ( AWCW) . SHANGHAI: 1♂, Shanghai, Timbu , Xantus leg. ( USNM) . ZHEJIANG: 4♀♀, Tamaon Isl. , without additional data ( BMNH) . HONGKONG: 1♂, Lantau, Mui Wo , 2.iii.2006, P. Aston leg. ( PAHC) ; 1♂, Lantau, Wang Tang , 16.v.2008, P. Aston leg. ( PAHC) ; 1♀, Lantau, Wang Tang , 17.v.2008, P. Aston leg. ( PAHC) ; 1♀, Lantau, Wang Tang , 14.iii.2009, P. Aston leg. ( PAHC) ; 1♀, Lantau, Wang Tang , 19.iv.2008, P. Aston leg. ( PAHC) ; 1♂, Lantau , chicken farm beach, on white mulberry, 13.iii.2008, P. Aston leg. ( PAHC) ; 4♂♂ 4♀♀, Hongkong , without additional data ( BMNH, UMO) . VIETNAM: 7♂♂ 12♀♀, Cao Bang prov. , Bao Lac, without additional data ( NMPC) .

Description. Body length: males 7.5–8.7 mm (holotype 8.3 mm); females 8.3–9.7 mm.

Male: Head yellow, base of vertex usually with metallic black irregular collar laterally extended but not touching the eyes, narrow median stripe usually not reaching frontal tubercles, apices of mandibles black. Antennomeres 1-4 (or 5) yellow, rest darkenned. Pronotum usually yellow, rarely with 5 or 7 more or less distinct dark spots forming shape of alphabet ‘M’. Scutellum yellow. Elytra completely yellow, or with black extreme apical margin, or, rarely with metallic dark green spot covering apical quarter of elytra. Pro- and mesosternum yellow. Metasternum and abdomen black with blue metallic tint. Legs yellow, all femora and protibiae with black stripe on outer margin, meso- and metatibiae usually darkened apically. Tarsi brown or black.

Labrum transverse, with several long pale setae, anterior margin shallowly incised. Head semiopaque, finely microsculptured, glabrous, with several pale setae ventral to antennal sockets and on anterior part of clypeus. Interocular space 1.85 times as wide as transverse diameter of eye. Frontal tubercles subtriangular, distinctly elevated, separated from each other by a thin furrow. Interantennal space as wide as transverse diameter of antennal socket. Vertex impressed behind frontal tubercles. Antennae filiform, 0.90 times as long as body, length ratio of antennomeres 1–11 equals 28-11-18-35-30-32-32-30-29-27-34.

Pronotum transverse, 1.45–1.60 times as broad as long, widest at the anterior quarter, slightly convergent posteriorly (some specimens with parallel lateral margins). Surface lustrous, covered with very fine punctures, glabrous, with two distinct transverse lateral depressions. Anterior margin nearly straight or slightly concave, posterior margin slightly rounded, shallowly incised in middle, lateral margins nearly straight. All margins thinly bordered. Anterior angles moderately swollen, slightly produced anteriorly, posterior angles obtusely angulate. All angles with setigerous pore bearing one long pale seta. Scutellum triangular with rounded apex, shiny to semiopaque, glabrous.

Elytra shiny, slightly divergent posteriorly, covered with small dense confused punctures, glabrous or only with several pale hairs on apical slopes. Humeral calli well developed. Epipleura narrow, gradually disappearing before apex. Macropterous.

Ventral surface shiny, finely punctate, densely covered with pale hairs. Last ventrite impressed in middle, posterior margin almost straight with two feebly indicated incisions. Cavity on first protarsomere relatively flat, covers basal two third of profile in inner lateral view ( Fig. 28). Apex of first metatarsomere not prolonged posteriorly ( Fig. 57). Protibia slender ( Fig. 36). Basimetatarsomere as long as two following tarsomeres combined.

Median lobe of aedeagus widest at basal third, gradually narrowed anteriorly, with median ventral groove in apical half ( Fig. 20).

Female: First protarsomere not enlarged. Abdomen robust, convex, last ventrite with regularly rounded posterior margin. Spermathecal cornu regularly rounded, as wide as nodulus, nodulus oval, proximal spermathecal duct shorter than nodulus (Fig. 44).

Differential diagnosis. Pale forms (without apical elytral spots) of M. oblonga are very similar to M. latimana . Both species can be distinguished by the shape of the first metatarsomere which is prolonged ventrally in M. latimana ( Fig. 58) but not prolonged in M. oblonga ( Fig. 57). Rare dark form of M. oblonga (with apical elytral spots) resembles M. soreli , M. lunata , M. cyanura and M. anicka sp. nov. It differs from all these four species by smaller, metallic green apical elytral spot covering not more than apical quarter of the elytra and by the slender protibia ( M. soreli , M. lunata , M. cyanura and M. anicka have larger apical elytral spot covering apical third of elytra and robust protibia).

Distribution. Vietnam (present paper), Hongkong ( Aston 2009, present paper), China: Fujian ( Weise 1922, present paper), Guangxi (present paper), Guizhou ( Li & Yang 2002, Yang, 1993), Hunan ( Yang 1992, present paper), Jiangxi ( Fairmaire 1888), Shanghai (present paper), Zhejiang ( Yang 1995, present paper). Most previous records were published under the names M. soreli or M. cyanura .