Mimela galbinata, Prokofiev & Zorn, 2016

Prokofiev, Artem M. & Zorn, Carsten, 2016, Review of the Mimela species of the Dalat Plateau in southern Vietnam (Coleoptera, Scarabaeidae, Rutelinae), Beiträge Zur Entomologie = Contributions to Entomology 66 (2), pp. 329-346 : 333-335

publication ID	https://doi.org/ 10.21248/contrib.entomol.66.2.329-346
persistent identifier	https://treatment.plazi.org/id/7A52E960-FF82-501B-FF39-F857FC1FA36F
treatment provided by	Carolina
scientific name	Mimela galbinata
status	sp. nov.

Treatment

Mimela galbinata spec. nov.

( Figs 6 View Figs 1–14 , 32–35 View Figs 29–43 )

Holotype:  “ VIETNAM, Lam Dong prov., Lac Duong distr., Bi Doup – Nui Ba Natl. Park, betw. Hon Giao & Giang Ly, DT 723, ~ 33 km E Dasar, ~ 70 km W K. Vinh, 12°10.94' N, 108°41.47' E, alt. 1500 m, at light, 30– 31.5. 2012, A.M. Prokofiev leg. | [holotype label]” ( CAP). GoogleMaps

Paratypes: 1  “S VIETNAM, 28.– 30.4.1994 12 km N of Dalat-LangBian P. Pacholátko & L. Dembický leg. | AV 58 | Coll. P. Pacholátko Invt.No. | [paratype label]” ( CPP). 1  “S VIETNAM, 28.– 30.4.1994 12 km N of Dalat-Lang- Bian P. Pacholátko & L. Dembický leg. | AV 58 | [paratype label]” ( CPP). 7 , 1  “S VIETNAM, 12.03N 108.27E 12 kmNofDalat-LangBian 1580–1750 m, 17–21–iv.1995 Pacholátko & Dembický leg. | Coll. P. Pacholátko Invt.No. | [paratype label]” ( CCZ, CPP). 20 , 13  “ GoogleMaps VIETNAM, Lam Dong prov., Lac Duong distr., Bi Doup – Nui Ba Natl. Park, alt. 1400–1700 m, at light, 5.2009, A.M. Prokofiev leg. | [paratype label]” ( CAP). 40 , 26 , [same data as above but 4.2010] | [paratype label]” ( CAP). 35 , 38 , [same data as above but 4–5.2012] | [paratype label]” ( CAP). 1  “ Lam Dong Prov., Lac Duong Dist. Bidoup Nuiba Natl Park, surr. Giang Ly Ranger Station (1420– 1460 m a.s.l.) 16–21.VI.2015 at light | legit L. Bartolozzi, G. Chelazzi, S. Bambi, F. Fabiano, E. Orbach, V. Sbordoni (n. Magazzino 3023) | [paratype label]” ( MZUF). 2  “C GoogleMaps VIETNAM: Kon Tum Province, ca. 30 km from Kon Plong , 1250 m 14°40,320' N 108°15,829' E | legit L. Bartolozzi, S. Bambi, A. Bandinelli, V. Sbordoni (Mag. 3078) | [paratype label]” ( CCZ, MZUF) GoogleMaps .

Description (holotype): Length 13.5 mm, greatest width 6.8 mm. Greenish-testaceous, shining from above, head and pronotum darker; reddish-testaceous below; legs reddish-brown, tarsi darker, teeth of protibia infuscated; antennae reddish-testaceous, club darker; pilosity pale.

Clypeus trapezoidal, with sides convergent anteriad, anterior angles broadly rounded, not distinct; anterior margin straight, clearly raised. Fronto-clypeal suture conspicuous, forming a short branch (less conspicuous) to inner-anterior border of eye, which completely separating the canthus ocularis. Clypeus and anterior part of frons coarsely and rugosely punctate, punctures becoming smaller and much sparser toward the vertex. Pronotum 1.9 times broader than long, sides almost parallel in basal half, distinctly convergent and slightly concave in anterior half; anterior angles produced, sharp; posterior angles straight, well-marked. Anterior margin weakly bisinuate, with marginal line in lateral thirds; posterior margin of pronotum slightly bisinuate, with middle part (before scutellum) much more convex, straightened; posterior border of pronotum weak and interrupted far before scutellum. Sides of pronotum with few long erect distant hairs. Pronotum moderately densely, rather finely punctured, punctures becoming smaller toward the sides. Scutellum sparsely, finely and rather unevenly punctured, distal margin ogival. Elytra finely but densely punctured; punctures in interspaces slightly irregular; punctate rows hardly discernible. Sides of elytra with marginal line, with elytral epipleura thickened below humeral umbo, along all length bearing rather dense and long setae. Pygidium not very convex, finely and sparsely punctured, with long erect hairs at apex only.

Prosternal process well-developed, plough-shaped, bluntly pointed anteriorly. Mesometasternal process very short, truncate. Sides of sterna coarsely, rugosely punctate and setose, with rather long but not dense adpressed hairs; disc of metasternum bare, glabrous, weakly impressed. Abdominal sternites with several transverse rows of rather long but sparse semi-erect hairs, which are much longer in middle third of penultimate visible sternite; last visible sternite bearing a transverse row of rather short hairs along midline and much longer hairs along distal border.

Protibia bidentate, teeth closely spaces, inner spur attached at level of basal tooth. Last joint of fore tarsi thickened, indented at mid-length of its concave margin, with a short protrusion on each side at anteroventral corner. Inner fore claw broadened, slightly toothed at basal third, with lobes almost parallel, lower lobe twice broader than upper at base. Outer claw of middle tarsi cleft.

Aedeagus: Figs 32–35 View Figs 29–43 .

Female: Length 14.0 mm, greatest width 8.5 mm. Antennal club shorter. Side margin of elytra distinctly callose just behind middle. Apical tooth of protibia much longer and broader. Inner spur attached well behind basal tooth of protibia. Last joint of fore tarsi less broadened distally, indented at midlength of its concave margin; inner claw narrow, with lower lobe only 1.5 times broader than the upper one at base. Vaginal palpi of irregular shape, with double incised inner margin, apically setose.

Variations: Length 12.0–14.0 mm, greatest width 6.3–7.3 mm (males), 13.0–15.0 mm (few larger than 14 mm), greatest width 7.0– 8.5 mm (females). Greenish luster on dorsal surface variable. In extreme cases head and pronotum greenish-brown, elytra yellowish to reddish testaceous with slight greenish luster. Clypeus and frontoclypeal suture sometimes margined by blackish-green. Pronotum 1.9–2.0 times broader than long, anterior border sometimes very indistinctly bisinuate, sides in anterior half sometimes almost straight, in posterior half sometimes slightly convergent toward base; posterior angles straight to weakly obtuse. Punctation of scutellum sometimes quite regular. Punctation of pygidium slightly varies in size and density of punctures.

Differential diagnosis: Mimela galbinata is a close relative of M. epipleurica OHAUS, 1930 , a species described from a (single?) female from Lao Cai, Vietnam. The true identity of M. epipleurica is still a little uncertain because no males from the type locality have ever been found. The application of the name M. epipleurica to a species occurring in Yunnan by LIN (1990) has yet to be confirmed even if this species appears to be externally identical to the syntype, and such distribution pattern would be very plausible. Mimela galbinata from Dalat is different from M. epipleurica in the following characters: color more testaceous dorsally (dark metallic green in M. epipleurica ), yellowish coloration of the lateral margin of pronotum broader, sutural costa less raised in the posterior two thirds of elytra, body shape somewhat rounder and shorter, the epipleural lateral bulge of females less developed. Males of M. epipleurica have a more flattened protibia than those of M. galbinata . The aedeagus is very different from M. epipleurica sensu LIN, 1990 (figs 67–69) with the parameres more asymmetric and distinctly shorter. The right paramere is much more strongly bent downward.

Distribution: So far known only from the Dalat Plateau, South Vietnam.

Etymology: The species epithet is formed by the Latin adjective “ galbinatus, - a, - um ”, meaning “dressing yellow-green”.