Glenopopillia skalei Zorn & Lu, 2018

Lu, Yuan Yuan, Zorn, Carsten, Král, David, Bai, Ming & Yang, Xing Ke, 2018, Taxonomic revision of the genus Glenopopillia (Coleoptera: Scarabaeidae: Rutelinae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 58 (2), pp. 297-320 : 317-319

Glenopopillia skalei Zorn & Lu , sp. nov.

( Figs 3F,L ; 4F,L,R ; 5F,L,R )

Type locality. N Vietnam, Cao Bang Province, Vin Den, Nui Pla Oac Nature Reserve, 22°33ʹ53″N, 105°52ʹ53″E, 900–1300 m a. s. l.

Type material (6 spec.). HOLOTYPE: ♂ ( NMEC), ‘N-VIETNAM Cao Bang Prov., vic. | Vin Den, Nui Pia Oac Nature Res. | 10.–15.V.2014, 22°33’53’’N, | 105°52’53’’E 900–1300m, A. Skale [p]’. PARATYPES: 1 ♂ 2 ♀♀ ( ASPC, CZPC), same data as holotype; 1 ♂ 1 ♀ ( CZPC, NMEC), ‘N-VIETNAM Cao Bang Pr. | vic. Vin Den, Nui Pia Oac | Nature Res., 6. –10.V.2013 | 22°33’53’’N, 105°52’53’’E | 900–1300m leg. A. Weigel || collection | NATURKUNDE – | MUSEUM ERFURT [yellow] [p]’.

Description of holotype (♂). Body shape. Elongate ovoid, weakly convex.

Color. Ground color blackish-brown with strong green to red metallic luster; legs dark orange except for mesoand metatarsus, meso- and metafemur, and apical part of metatibia being dark brown with green metallic luster; clypeus and antenna light brown; elytra light brown with weak metallic sheen; anterior margin before humeral umbone and mid-lateral margin dark brown; suture and inner 1/3 to 1/2 of costal interval 1 blackish-brown; some vague, pale yellow spots present as follows: one posteriorly of scutellum; two near middle of lateral margin; one between 2/3 and 3/4 of elytral length spanning costal interval 1 to 2.

Head. Clypeus subrectangular, disc very densely, transversely, confluently punctate; anterior corners rounded; anterior margin weakly reflexed; frons very shallowly impressed, punctate like clypeus; vertex very sparsely and finely punctate; ratio of interocular width/width of head approximately 0.67; antennal club longer than antennomeres 2–6 combined.

Pronotum approximately 1.5 times wider than long, with two deep, oblique impressions on each side (posterior impression larger than anterior) and shallow median longitudinal furrow; with steep decline along lateral margin; disc extremely finely and sparsely punctate, punctures becoming gradually larger laterally; sparse erect setae present near anterior angles and along lateral margin; anterior angles acute and strongly produced; posterior angles obtuse; sides of pronotum distinctly converging anteriad in posterior two thirds, then strongly curved, strongly converging, and slightly sinuate in anterior third; basal marginal line interrupted before scutellum between level of elytral interstice 2 on each side; all other marginal lines complete.

Scutellum nearly semicircular, broader than long, moderately finely and sparsely punctate.

Elytra regularly striate; three inner costal intervals (1, 2 and 3) slightly more convex than interstices; strial punctures large, distinct; subsutural interstice with a secondary stria that is irregularly doubled anteriorly and almost reaches posterior elytral margin; distinct but discontinuous secondary stria also present on interstice 2, secondary stria on interstice 3 only present in anterior half; elytral surface with sparse micropunctation; humeral umbone and apical protuberance very prominent; opaque area at apical curvature narrow; lateral margin with flat paramarginal extension in anterior half of elytron; epipleuron broad near humerus, ending slightly posteriorly of elytral midlength; epipleuron with several short white setae near humerus and stout strongly spiniform black setae beginning at humerus and extending in a row along lateral margin to apical curvature (becoming gradually larger apicad); three large spiniform setae present near apico-sutural angle; posterior margin evenly, separately rounded.

Propygidium with dense fringe of white setae along posterior margin covering approximately 1/3 of propygidial length in middle and 1/4 of length at sides.

Pygidium strongly convex; apex broadly rounded; punctation transverse and rather sparse on disc (except across vague midline), transforming into concentrically arranged dense striolation at sides and base; with two big spots of white setae near base and some white setae scattered at lateral margin; apex with several long, erect brownish setae.

Ventral thoracic surface densely covered with soft, long, white setae.

Meso-metaventral process short, compressed between mesocoxae, projecting slightly downward in lateral view, anteriorly vertical and straight; apex subrectangular, somewhat rounded; bulbiform in ventral view.

Abdominal ventrites with transverse band of dense, long, white setae in posterior half (broadly interrupted in middle) and irregular white setae on each side of anterior half of ventrites 2–4; ventrites 1, 2 and anterior half of ventrite 3 carinate laterally.

Legs. Meso- and metafemur with two bands of long white setae, one along anterior margin, the second emerging from a transverse row of punctures parallel to posterior margin. Protibia bidentate, broadened, approximately 3.3 times longer than wide; proximal tooth short, situated close to the rather short, curved apical tooth; inner spur very short, at level of proximal tooth. Metatibia fusiform; protarsus slender; protarsomere 5 (without claws) slightly longer than tarsomeres 1–4 combined; inner protarsal claw approximately 3/4 as long as protarsomere 5, deeply incised apically, upper branch spiniform, lower branch broad, obliquely truncated; outer mesotarsal claw approximately as long as combined length of mesotarsomeres 1–4, deeply incised at apex, upper branch spiniform; metatarsal claws very unequal, outer claw approximately twice as thick and 1/3 longer than the inner one.

Aedeagus as in Figs 5F,L,R .

Female. Protibia slender, apical tooth of protibia long and spatulate; protarsus articulated slightly basally of level of proximal tooth; inner spur long, articulated between 1/2 and 2/3 of tibial length; protarsus very slender, protarsomere 5 (without claws) shorter than tarsomeres 1–4 combined; modified claws of pro- and mesotarsi shorter, two apical branches more equal than in males; antennal club as long as antennomeres 2–6 combined.

Measurements. Total body length 10.6–11.0 mm (HT 11.0 mm), total body width 5.6–6.5 mm (HT 6.3 mm).

Morphological variation. Number of elytral spiniform setae near apico-sutural angle varies between 2 and 4. Secondary stria on interstice 3 may or may not be present in posterior half of elytra. Shape of parameres very constant.

Differential diagnosis. Glenopopillia skalei sp. nov. is very similar to G. rufipennis rufipennis and G. fossulata in having the same light brown elytra. In contrast to those two taxa, the inner 1/3 to 1/2 of costal interval 1 is blackened (only suture blackened in G. r. rufipennis and G. fossulata ), the protibia is wider in G. skalei sp. nov., and the fringe of white setae of the propygidium is half as long as the length of the propygidium in the middle (one third as long in G. rufipennis and G. fossulata ). The parameres are symmetrical and similar to those of G. maculata , but are broader in dorsal view, with the subapical tooth closer to the apex and bent upwards in lateral view. Moreover, the basal piece of the ventral plate is more strongly developed ( Figs 5F,L,R ).

Etymology. Patronymic (noun in the genitive case), named in honor of André Skale who collected most of the type material including the holotype.

Distribution. Vietnam (Cao Bằng Province).

Figures

Fig 5.Aedeagus of Glenopopillia. A–F – dorsal view, G–L – ventral view, M–R – right lateral view.A, G, M – G. forceps sp. nov. (HT); B, H, N – G. maculata Lin, 1980 (Vietnam, Bắc Giang Prov.); C, I, O – G. mengi sp. nov. (HT); D, J, P – G. rufipennis rufipennis Lin, 1980 (Laos, Houaphanh Prov.). E, K, Q – G. r. nigropicta subsp. nov. (HT); F, L, R – G. skalei sp. nov. (HT). Sc 1: Scale for A–R, except D, J, P = 1 mm; Sc 2: Scale for D, J, P = 1 mm.

Fig. 3. Habitus of Glenopopillia. A–F – dorsal view, G–L – lateral view.A, G – G. forceps sp. nov. (HT); B, H – G. maculata Lin, 1980 (Vietnam, Bắc Giang Prov.), C, I – G. mengi sp. nov. (HT); D, J – G. rufipennis rufipennis Lin, 1980 (Laos, Houaphanh Prov.); E, K – G. r. nigropicta subsp. nov. (HT); F, L – G. skalei sp. nov. (HT). Scale = 5 mm.

Fig. 4. Details of Glenopopillia. A–F – habitus, ventral view; G–L – head; M–R – propygidium and pygidium.A, G, M – G. forceps sp. nov. (HT); B, H, N – G. maculata Lin, 1980 (Vietnam, Bắc Giang Prov.); C, I, O – G. mengi sp. nov. (HT); D, J, P – G. rufipennis rufipennis Lin, 1980 (Laos, Houaphanh Prov.); E, K, Q – G. r. nigropicta subsp. nov. (HT); F, L, R – G. skalei sp. nov. (HT). Not to scale.