Glenopopillia fossulata ( Benderitter, 1929 ) Lu & Zorn & Král & Bai & Yang, 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 : 305-307

Glenopopillia fossulata ( Benderitter, 1929) , comb. nov.

( Figs 6 A–I)

Strigoderma fossulata Benderitter, 1929: 103 , Fig.2 (original description).

Trichanomala fossulata: PAULIAN (1959) : 104, Figs 242, 243 (new combination); MACHATSCHKE (1972): 197 (catalogue); KRAJČÍK (2007): 123 (catalogue); KRAJČÍK (2012): 255 (catalogue).

Type locality. ‘ Tonkin, Chapa [= Vietnam, Lào Cai Province, Sapa]’.

Type material studied (2 spec.). SYNTYPES: 1 ♁ ( BMNH), ‘Co- | type [yellow] [p] || 1930.275 [hw] | TONKIN [p] | Chapa | 20.VI. [hw] 191 [p] 8 [hw] | JEANVOINE [p] || Strigoderma ♁ | fossulata cotype Bend [hw] | E. Benderitter, det. [p]’; 1 ♁ ( IRSB), “ TONKIN [p] | Chapa | 11.VII. [hw] 191 [p] 7 [hw] | JEANVOINE [p] || Strigoderma ♁ | fossulata cotype Bend [hw] | E. Benderitter, det. [p] || R. I. Sc. N. B. 16.117 | L. Burgeon, coll. Et det. [p]”.

Redescription of syntype (♁ from BMNH). 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 which are dark brown with green metallic luster; clypeus and antenna light brown; elytra predominantly light brown with weak metallic sheen; sutural margin narrowly blackened; some vague, pale yellow spots as follows: one posteriorly of scutellum; two near middle of outer margin: inner spot in costal interval 3, outer one slightly larger than inner and spanning costal interval 4 to 5; one subquadrate spot approximately between 2/3 and 3/4 of elytral length, from 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, laterally punctate like clypeus, separately punctate at middle; 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 (posteri- or impression larger than anterior) and deep 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 weakly 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 costal interval 3 on each side; all other marginal lines complete.

Scutellum nearly semicircular, broader than long, 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 secondary stria being irregularly doubled anteriorly and almost reaching the 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 prominent; opaque area at apical curvature broad, including interstice 4 laterally; lateral margin with wide flat paramarginal extension between humerus and middle of elytra; epipleuron broad near humerus, ending slightly posteriorly of elytral midlength; epipleuron with numerous soft short white setae near humerus and stout spiniform black setae beginning posteriorly of humerus and extending along lateral margin to apical curvature (becoming gradually larger apicad); three additional 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.

Pygidium very convex; apex broadly rounded; punctation transverse, rather sparse on disc (except across vague midline), transforming into concentrically arranged dense striolation at sides and base; with two small spots of white setae near base and another two vague spots in a small depression 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 a transverse band of dense, long, white setae in posterior half (broadly interrupted in middle) and irregular white setae on each side of the anterior half of ventrites 2; ventrites 1–3 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, rather long, broadened, appro- ximately 4.3 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 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, curved, 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 6 F–H.

Female. Unknown.

Measurements. Total body length 12.5–12.9 mm, total body width 7.0– 7.2 mm.

Differential diagnosis. Glenopopillia fossulata is very similar to G. r. rufipennis Lin, 1980 and G. skalei sp. nov. in having the same light brown color type of the elytra. Glenopopillia skalei sp. nov. is clearly separated by the partly blackened costal interval 1, and the wider protibia in males. The two syntypes have only one transverse band of setae on each abdominal ventrite while the anterior part is more or less glabrous. In G. r. rufipennis , there are white setae present in the anterior half of abdominal ventrites 2–4. Punctures in abdominal ventrites are fewer and smaller; setae at the metafemur are distinctly shorter and less dense; spiniform setae in metatibia are not strong as G. r. rufipennis . The shape of the parameres is very specific. In contrast to G. r. rufipennis and G. skalei sp. nov., the parameres of G. fossulata are symmetrical with the apex strongly curved but simple, without subapical denticle ( Figs 6 F–H).

Distribution. Vietnam (Lào Cai Province) ( BENDERITTER 1929).