Glenopopillia albopilosa 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 : 299-301

Glenopopillia albopilosa Zorn & Lu , sp. nov.

( Figs 2 A–I)

Type locality. Central Vietnam, Thừa Thiên-Huế Prov., Bạch Mã National Park.

Type material (15 spec.). HOLOTYPE: ♂ ( VNMN), ‘C VIETNAM: Thua Thien Hue | Prov ., Bach Ma National Park | (16.193°N 107.853°E) 1250m [p] || 28.V – 1. VI. 2017 L. Bartolozzi | E. Orbach, V. Sbordoni, | S. Bambi &A. Bandinelli leg. | (numero Mag.3089) [p]’. PARATYPES: 1♂ ( ZMPC), ‘Dambri. Bảo Lâm.| Lâm Đồng, Vietnam. | March, 2017, | local collector leg. [p]’; 3♂♂ 2♀♀ ( CZPC), ‘Dambri. Bảo Lâm. | Lâm Đồng, Vietnam. | March, 2018, | local collector leg. [p]’; 4 ♂♂ 4 ♀♀ ( CZPC), ‘Dambri. Bảo Lâm. | Lâm Đồng, Vietnam. | April, 2018, | local collector leg. [p]’.

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

Color. Ground color blackish-brown with strong dark green metallic luster; antennomeres 1–6, maxillary palpi, labial palpi and lateral teeth of protibia dark orange, antennal club black; elytra black with two arcs of rather small yellow spots: 6 anterior spots encircling scutellum and 8 additional spots of which the most anterior is situated beneath humeral umbone and the most posterior lies in interstice 1 and costal interval 2 at ca. 2/3 of elytral length.

Head. Clypeus subtrapezoidal, disc very densely, transversely rugopunctate, anterior corners rounded; anterior margin weakly reflexed; frons rugopunctate and with very shallow impression at middle, confluently punctate at sides; vertex finely and sparsely punctate at middle, coarsely punctate laterally; ratio of interocular width/ width of head approximately 0.64; antennal club longer than antennomeres 1–6 combined.

Pronotum approximately 1.56 times wider than long, with oblique impression posteriorly of middle on each side and median longitudinal furrow, with steep decline along lateral margin; sharply defined area posteriorly of anterior angle with deep, coarse, confluent punctures, area of lateral impression with coarse, separate punctures, remaining surface smooth with scarce micropunctures; with sparse, erect setae at lateral margin; anterior angles acute and strongly produced; posterior angles rectangular; sides of pronotum slightly converging anteriad in posterior half, strongly converging in anterior half; basal marginal line present only near posterior angle; all other marginal lines complete.

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

Elytra regularly striate; costal intervals and interstices similarly slightly convex; strial punctures distinct, coarse, subsutural interstice with a secondary stria irregularly doubled anteriorly and disappearing in posterior quarter; vague secondary striae also present in anterior part of interstice 2 (anterior 1/5) and 3 (anterior half); elytral surface with sparse micropunctation; humeral umbone and apical protuberance prominent; opaque area at apical curvature narrow; lateral margin with flat paramarginal area between humerus and middle of elytra; epipleuron broad near humerus, ending slightly posteriorly of middle of elytron; epipleuron with soft, white setae continuing along lateral margin to apical curvature; another 2–3 large white setae near and at apicosutural angle; posterior margins evenly, separately rounded.

Propygidium with dense fringe of white, rather short setae along posterior margin.

Pygidium strongly convex; apex broadly rounded; punctation densely punctate-imbricate, transversely confluent; with scattered white setae near base; 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 rather sparse white setae (usually 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. Mesofemur 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 slender, approximately 3.9 times longer than wide; proximal tooth short, situated close to the rather long, weakly curved apical tooth; inner spur short, positioned at level of space between proximal and apical teeth. Metatibia fusiform. Protarsomere 5 (without claws) slightly longer than protarsomeres 1–4 combined; inner protarsal claw approximately 3/4 as long as protarsomere 5, strongly curved and 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 distinctly longer than inner.

Aedeagus as in Figs 2 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 mesotarsus shorter, two apical branches more equal than in males; antennal club slightly longer than antennomeres 2–6 combined.

Measurements. Total body length 10.4–11.9 mm (HT 11.9 mm), total body width 6.0– 7.2 mm (HT 7.2 mm).

Morphological variation. All six paratypes have the sides of the pronotum suffused with orange and dark orange femurs and tibiae with the knee joints and apices of tibiae dark metallic green. The size of the yellow elytral spots is variable. Some spots become divided in specimens with generally smaller spots. Number of elytral setae near apico-sutural angle varies between two and five. Shape of aedeagus remains consistent.

Differential diagnosis. Glenopopillia albopilosa sp. nov. is clearly separated from all other species in this genus by several characters: the setae on the elytral margin and epipleuron are soft and white, not rigid and dark as in all other species. The pronotum has only one oblique lateral impression (none in G. klossi , two in all other species). The coarsely punctate areas of the pronotum are sharply defined (more gradually changing in the other species). The legs are generally more slender than in all other species; the apical tooth of the protibia is laterally protruding beyond the proximal tooth (not surpassing the proximal tooth in all other species). The antennal club is very long in males, longer than the combined length of the remaining antennomeres (longer than antennomeres 2–6 combined in the other species). The elytra are predominantly black in G. albopilosa sp. nov. whereas larger parts are light colored in the other species.

Etymology. The specific epithet (adjective in the nominative singular case) references the color of the setae on the lateral elytral margin, which is white and not blackish- brown as in all the other species of this genus.

Collecting circumstances. The holotype was collected with a beating sheet at the forest edge (L. Bartolozzi, pers. comm.).

Distribution. Central Vietnam, Thừa Thiên-Huế and Lâm Đồng Provinces.

Figures

Fig. 2. Glenopopillia albopilosa sp. nov., holotype. A–C – habitus: A – dorsal view, B – ventral view, C – right lateral view; D – propygidium and pygidium; E – head and pronotum; F–H – aedeagus: F – dorsal view, G – ventral view, H – right lateral view; I – lateral margin of elytra. Sc. 1: scale for A–C = 5 mm; Sc. 2: scale for F–H = 1 mm.