Mimastra riedeli, Bezděk, 2009

Bezděk, Jan, 2009, Revisional study on the genus Mimastra (Coleoptera: Chrysomelidae: Galerucinae): Species with unmodified protarsomeres in male. Part 1., Acta Entomologica Musei Nationalis Pragae 49 (2), pp. 819-840 : 834-839

publication ID	https://doi.org/ 10.5281/zenodo.5324956
persistent identifier	https://treatment.plazi.org/id/310D87B2-FFB2-581E-C788-9D5EFDAFFE86
treatment provided by	Felipe
scientific name	Mimastra riedeli
status	sp. nov.

Treatment

Mimastra riedeli sp. nov.

( Figs. 21 View Figs , 32 View Figs )

Type locality. India, Uttar Pradesh state, Rishikesh, Uttarkashi.

Type material. HOLOTYPE: J, ‘ INDIEN: Uttar Pradesh, / Rishikesh, Uttarkashi / 6.7.1989; 1400m / leg.A. RIEDEL [yellow label, p] // Mimastra / cyanura Hope [h] / L. N. Medvedev det. 19 [p] 92 [w, h]’ ( SMNS). PARATYPES: 1 J, ‘ INDIEN: Uttar Pradesh, / Rishikesh, Uttarkashi / 6.7.1989; 1400m / leg. A. RIEDEL [yellow label, p]’ ( JBBC); 1 J, ‘NEP: Mahakali/Darchula / env. Makarighar, 29°47´N / 80°50´E 12–1400m 03.VI. / 2005 leg. A. Weigel [w,

p]’ ( NMEG). The specimens are provided with additional, printed red labels: ‘ HOLOTYPUS [or PARATYPUS], / Mimastra / riedeli sp. nov., / J. Bezděk det. 2008’.

Description. Body length: males 7.20–7.50 mm (holotype 7.50 mm).

Male. Body flattened, subparallel, glabrous. Head yellow, apices of mandibles black, base with dark collar, triangularly extended behind eyes. Antennomeres 1–3 yellow, antennomeres 4–5 gradually darkened, remaining antennomeres black. Pronotum yellow with five small, almost indistinct brown spots (two on disc, three in front of base). Scutellum yellow. Elytra yellow with drop-shaped metallic green spot not touching elytral margins in posterior half of each elytron. Extreme apical angle of elytra darkened. Prosternum, mesosternum and abdomen yellow. Metasternum black with paler anterior and posterior margins. Legs yellow, femora with small dark stripe in apical third on outer side, tibiae with gradually widening black stripes on outer sides and almost completely dark apices, all tarsi dark brown to black.

Labrum transverse, anterior part with several long pale setae, anterior margin slightly concave. Anterior part of head lustrous, with impressed median line, clypeus with long pale setae, several setae also in front of antennal insertions. Frontal tubercles separated from each other by distinct furrow, semiopaque, subtriangular, slightly elevated and covered with microsculpture. Interantennal space as wide as the transverse diameter of antennal insertion. Vertex lustrous, impunctate, glabrous, except one long pale seta behind each eye. Antennae filiform, as long as body, length ratios of antennomeres 1–11 equal to 17-11-14-20-19-18- 17-16-16-15-17.

Pronotum transverse, 1.85–1.90 times as broad as long, widest at anterior third. Surface lustrous, covered with very fine indistict punctures, glabrous, moderately convex, with two longitudinal depressions laterally. All margins distinctly bordered. Anterior margin nearly straight, posterior margin slightly rounded. Lateral margins nearly straight, slightly convergent posteriad. Anterior angles rounded, posterior angles obtusely angulate. All angles with setigerous pore bearing one long pale seta.

Scutellum triangular with rounded apex, lustrous, glabrous.

Elytra semiopaque, slightly divergent posteriad, almost glabrous, very scarcely covered with very short, indistinct setae. Humeral calli well developed. Elytral surface covered with small and very dense confluent punctures. Epipleura broad in anterior fourth, gradually narrowing towards apex. Macropterous.

Ventral surface semiopaque, finely punctate and covered with pale hairs. Last ventrite feebly impressed medially.

Hind tarsomere 1 1.2 times as long as two following tarsomeres combined. Aedeagus as in Fig. 21 View Figs .

Female unknown.

Differential diagnosis. Mimastra riedeli sp. nov. resembles other Mimastra species with an apical spot on the elytra, i.e. M. cyanura (Hope, 1831) , M. uncitarsis (Laboissière, 1940) , M. soreli Baly, 1878 and some colour forms of M. polita and M. semimarginata Jacoby, 1886 . However, M. riedeli sp. nov. can be distinguished from these species by the yellow abdomen (black in the other similar species) and the elytral spot not touching apical and sutural margins (in the other species the spot touches at least the apical margin). Moreover, protarsomere 1 is simple in males of M. riedeli sp. nov. but modified in males of M. cyanura , M. uncitarsis , M. soreli and M. semimarginata .