Glenopopillia nagaii ( Sabatinelli, 1997 )

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 : 312-314

Glenopopillia nagaii ( Sabatinelli, 1997)

( Figs 9 A–I)

Callistethus nagaii Sabatinelli, 1997: 249 , Figs 3–4 , 25 (original description).

Glenopopillia nagaii: ZORN (2005) :320 (new combination), ZORN (2006): 272 (catalogue); KRAJČÍK (2007): 72 (catalogue); KRAJČÍK (2012): 113 (catalogue); ZORN & BEZDĚK (2016): 351 (catalogue).

Type locality. ‘North Vietnam, Mt Tamdao’.

Type material studied (2 spec.). PARATYPES: 1 ♂ ( MHNG) ( Figs 9 A–I), ‘North VIETNAM | Mt Tamdao, VI. 1993 | S. Nagai leg. [p] || Paratypus [p] ♂ [hw] | Callistethus nagai n. sp. | des. Sabatinelli 1997 [red] [p]’ ( Fig. 9I ); 1 ♀, ( MHNG), ‘North VIETNAM | Mt Tamdao, VI. 1993 | S. Nagai leg. [p] || Paratypus [p] ♀ [hw] | Callistethus nagai n. sp. | des. Sabatinelli 1997 [red] [p]’.

Additional material studied (49 spec.). VIETNAM: VĨNH PHÚC PROVINCE: 2 ♂♂ 1 ♀ ( NMPC), Tam Dao, 3.–11.vi.1985, 900– 1400 m, J. Jelínek lgt.; 1 ♂ ( DKCP), Tam Dao, 5.vi.1986, D. Král coll.; 4 ♂♂ 3 ♀♀ ( MSPC, PPCB), Tamdao, 2.–11.vi.1985, Vít. Kubáň lgt.; 1 ♂ 3 ♀♀ ( CZPC), Tam Dao, ca. 1000 m, 17.–30.vi.1999, A. Kallies lgt.; 1 ♂ ( CZPC), Tam Dao, 8.–22.v.1990, Miloš Dudycha lgt.; 1 ♀ ( CZPC), Tam Dao NP, 4.vi.2012, 21°27.577ʹN 105° 38.489ʹE, 1000 m, M. Pejcha lgt.; 1 ♀ ( CZPC), Tam Dao, 930 m, vi.‒viii.1997, native collector lgt.; 1 ♂ ( PKLC), Tam Dao National Park, N 21.4603° E 105.64201°, 1027 m, 1.–4.vi. 2013, Nathan M. Schiff lgt; 9 ♂♂ 5 ♀♀ ( MSPC), Tam Dao, 20.–28.vi.1990, Strnad Jan lgt.; 4 ♂♂ 6 ♀♀ ( MSPC), Tam Dao, 20.–27. vi.1990, A. Olexa lgt.; 2 ♂♂ ( MSPC), Tam Dao, 27.v.–2.vi. 1986, 900 m, A. Olexa lgt.; 1 ♂ ( MSPC), Tam Dao, 16.–23.v. 1991, 900 m, Strnad Jan lgt. 2 ♂♂ ( MSPC), Tam Dao, 6.–25.v.1990. LÀO CAI PROVINCE: 1 ♂ ( CZPC), Mt. Fan-si-pan, W-Seite [western slope], Cha-pa (=Sapa), 2000 m, 22.15°N 103.45°, E primär. Nebelwald [east, primary cloudy forest], 5.vii.1994, Brechlin & Schintlmeister lgt.

Doubtfully labeled material. CHINA: YUNNAN: 1 ♂ ( CZPC), Baoshan city env., 2000 m a.s.l., 10.vii.1998. A. Gorodinski lgt. (see Remarks below) .

Redescription of paratype (♂). Body shape. Elongate ovoid, weakly convex.

Color. Ground color blackish-brown with strong green to red metallic luster; legs dark orange except for meso- and metatarsus, meso- and metafemur, and apical part of metatibia being dark brown with green metallic luster; clypeus and antenna light brown; elytra including all margins, epipleura and suture blackish-brown with weak metallic sheen; a large oblique reniform yellow spot between humerus and costal interval 1 not reaching middle of elytron posteriorly, one small elongate yellow spot on anterior part of costal interval 5, two approximated small yellow spots slightly posteriorly of middle: one elongate in costal interval 3, the second transverse, spanning costal interval 4 to 5, and a subquadrate yellow spot in the apical 4/5 spanning costal interval 1 to 2.

Head. Clypeus subsemicircular, disc very densely, partly transversely confluently punctate; anterior corners widely rounded; anterior margin weakly reflexed; frons very shallowly impressed, laterally punctate like clypeus, separately punctate at middle; vertex sparsely and finely punctate; ratio of interocular width/width of head approximately 0.65; antennal club longer than antennomeres 2–6 combined.

Pronotum approximately 1.4 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, shallowly and sparsely punctate, punctures becoming gradually larger laterally; with 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 the 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 distinct; subsutural interstice with secondary stria being irregularly doubled anteriorly and almost reaching posterior elytral margin; distinct but discontinuous secondary striae also present on interstice 2 and 3; 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 elytra; 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 along lateral margin to apical curvature (becoming gradually larger apicad); 2 or 3 large spiniform setae present near apico-sutural angle; posterior margin evenly rounded.

Propygidium with dense fringe of white setae along posterior margin covering approximately 1/2 of propygidial length in middle and 1/3 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 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, 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 3.4 times longer than wide; proximal tooth short, situated close to the rather short, curved apical tooth; inner spur short, at level of proximal tooth. Metatibia strongly 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, slightly widened and deeply incised apically, upper branch spiniform, lower branch broad, obliquely truncated; outer mesotarsal claw very long, 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 inner.

Aedeagus as in Figs 9 F–H.

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 10.6–11.5 mm, total body width 6.0– 6.6 mm.

Morphological variation. Elytral yellow spots vary very slightly in shape and size. Number of elytral spiniform setae near apico-sutural angle varies between two and four. Shape of parameres very constant.

Differential diagnosis. The elytra of Glenopopillia nagaii have the same basic color pattern as those of G. forceps sp. nov., G. klossi and G. maculata . While it is easily distinguishable from G. klossi by the presence of rigid setae at the apico-sutural angle and by several further characters (see ‘Differential diagnosis’ of G. klossi ), it is extremely similar to G. forceps and G. maculata . It differs from G. maculata in the following characters: punctation of pronotum extremely fine and shallow between the lateral impressions (distinct, extremely shallow and sparse only in very middle in G. maculata ); end of each paramere with two laterally directed denticles, which are distinctly longer than those of G. maculata ( Figs 9 F–H). Glenopopillia nagaii is distinguished from G. forceps by the following characters: scutellum more or less coarsely punctate; protibia in males slightly stouter; yellow lateral spot of elytra not divided; secondary stria on interstice 2 reaching the posterior quarter of elytra; aedeagus symmetrical (asymmetrical in G. forceps ).

Distribution. Vietnam (Vĩnh Phúc and Lào Cai Provinces), so far known only from the Tam Đảo National Park and Mt. Phan Xi Păng ( SABATINELLI 1997).

Remarks. This species was reported from Yunnan, China ( ZORN 2006, ZORN & BEZDĚK 2016). We consider this record erroneous because the specimens on which it was based was presumably mislabeled.

Figures

Fig 9. Glenopopillia nagaii (Sabatinelli, 1997), paratype. A–C – habitus:A – dorsal view, B – ventral view, C – left lateral view; D – propygidium and pygidium; E – head and pronotum; F–H – aedeagus: F – dorsal view, G – ventral view, H – right lateral view; I – label. Sc 1: Scale for A–C = 5 mm; Sc 2: Scale for F–H = 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.