Mimastra tarsalis Medvedev, 2009

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 : 45-53

Mimastra tarsalis Medvedev, 2009

( Figs 9, 27, 35, 43)

Mimastra tarsalis Medvedev, 2009: 265 (original description).

Type locality. “ Vietnam, NW Tam Dao ridge, Shon-Duong .

Type material. Not examined. Described based on one male deposited in Medvedev´s personal collection.

Additional material studied. 13 specimens — LAOS : 1♂, Hua Phan prov., Phu Phan Mt. env., Ban Saluei , 1300–2000 m, 20°13´N 103°59´E, 6.–18.v.2004, J. Bezděk leg. ( JBCB) ; 1♂, Hua Phan prov., Ban Kangpabong env., 25 km SE Vieng Xai (by road), 20°19´N 104°25´E, 14.–18.v.2001, J. Bezděk leg. ( JBCB) ; 1♂, Phongsaly prov., Phongsaly env., 1500 m, 2141´ N 10206 ´E, 6.–17.v.2004, P. Pacholátko leg. ( NHMB) . THAILAND: 7♂♂, Nan prov., Doi Phuka N. P., 28.iv.–12.v.2002, P. Průdek & M. Obořil leg. ( JBCB) . VIETNAM: 1♂, Hoang Lien Son distr., Sa Pa , 1600 m, 1600 m, 11.–16.v.1990, J. Horák leg. ( JVCJ) . WITHOUT LOCALITY: 2♂♂ ( NMPC) .

Description. Body length: 7.6–9.9 mm (holotype 9.9 mm according to original description).

Male: Head completely yellow or base of vertex with dark irregular collar, apices of mandibles black. Antennae yellow, apical segments sometimes darkened. Pronotum completely yellow or with 5 dark spots forming shape of alphabet ‘M’ (two small indistinct spots in middle of disc, one small spot in middle in front of pronotal base and two large spots laterally near posterior angles). Scutellum and elytra yellow. Prosternum and mesosternum yellow. Metasternum and abdomen black with blue metallic tint. Legs yellow, tarsi and apices of meso- and metatibiae usually infuscate.

Labrum transverse, covered with several long pale setae, anterior margin moderately incised. Head shiny, covered with very fine microsculpture, almost glabrous, with several pale setae on anterior part of clypeus and in front of antennal insertions. 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 0.7 times as wide as transverse diameter of antennal socket. Frons impressed behind frontal tubercles. Antennae filiform, 0.95 times as long as body, length ratio of antennomeres 1–11 equals 38-12-22-40-38-35-39-35-33-28-35.

Pronotum transverse, 1.50 times as broad as long, widest at first quarter, slightly convergent posteriorly. Surface lustrous, covered with very fine punctures, glabrous, with two distinct transverse lateral depressions. Anterior margin straight, thinly bordered. Posterior margin slightly sinuate, distinctly bordered. Lateral margins straight, distinctly bordered. Anterior angles rounded, moderately swollen, slightly produced anteriorly, posterior angles obtusely angulate. All angles with a setigerous pore bearing one long pale seta, lateral margins near anterior angles and posterior margin with several short setae. Scutellum triangular with rounded apex, covered with fine microsculpture, shiny, glabrous.

FIGURES 44–50. Spermatheca. 44— M. oblonga ; 45— M. cyanura ; 46— M. lunata ; 47— M. soreli ; 48— M. latimana ; 49— M. guerryi ; 50— M. anicka sp. nov. Scale bar 1 mm.

Elytra shiny, slightly divergent posteriorly, covered with small dense confused punctures and sparse pale hairs visible on apical half. Humeral calli well developed. Epipleura narrow, gradually disappearing before apex. Macropterous.

Ventral surface semiopaque, finely punctate, densely covered with pale hairs. Last ventrite impressed in middle, posterior margin almost straight with two feebly indicated incisions. First protarsomere trapezoid, concave dorsally, ventral surface uneven, with 5 smaller concavities, setae form subtriangular area between two anterior concavities ( Fig. 35). Protibia moderately widened anteriorly ( Fig. 43). Basimetatarsomere as long as two following tarsomeres combined.

Median lobe of aedeagus moderately bent in apical third; with median ventral groove in apical half ( Fig. 27)

Female: Unknown.

Differential diagnosis. Characterised by first protarsomere trapezoid and concave dorsally in male ( Fig. 35).

Distribution. Vietnam. Newly reported from Laos and Thailand.