Zeugophora (Pedrillia) trifasciata, Li & Liang, 2020

Li, Kai-Qin & Liang, Hong-Bin, 2020, Four new species and two new records of genus Zeugophora (Coleoptera, Megalopodidae, Zeugophorinae) from China, ZooKeys 975, pp. 51-78 : 51

Zeugophora (Pedrillia) trifasciata sp. nov. Figures 58-61 , 62-66

Specimens examined.

Holotype: male, China, Yunnan, Ailaoshan, Xujiaba, 1986.viii.21 / Holotype, Zeugophora (Pedrillia) trifasciata sp. nov., des. by K.Q. Li & H.B. Liang, 2020 [red label]. Paratype, 1 male, same data as holotype but 1986.x.31 / Paratype Zeugophora (Pedrillia) trifasciata sp. nov., des. by K.Q. Li & H.B. Liang, 2020 [yellow label].

Diagnosis.

Head brown; antennae black, with basal four antennomeres brown; pronotum yellowish brown; scutellum dark brown; elytra dark blue with a pale yellow transverse band from epipleura to suture on the center; underside dark blue except prosternum and mesoventrite yellowish brown; legs yellowish brown except hind femur dark blue; antennae elongate, lateral sides of elytra sub-paralleled; dorso-central portion of the median lobe with one sclerite from base to apical portion.

Description.

BL = 4.3-4.4 mm, BW = 1.7-1.9 mm. Head brown; antennae black, with basal four antennomeres brown; pronotum yellowish brown; scutellum dark brown; elytra dark blue with a pale yellow transverse band from epipleura to suture on the center; underside dark blue except prosternum and mesoventrite yellowish brown; legs yellowish brown except hind femur dark blue.

Head: eyes prominent, inner margin with distinct canthus; center of vertex sparsely punctate and pubescent, lateral sides densely punctate and pubescent; occiput strongly constricted; frons finely punctate and pubescent, center slightly concave; clypeus rectangular, width 2.4 × that of length, central portion slightly prominent, punctate and pubescent laterally, separated from frons by deep fronto-clypeal suture; shallow oblique groove from inner margin of upper portion of eye to fronto-clypeal suture; labrum rectangular, slightly narrower than clypeus, anterior margin with punctures and pubescence; antennae slender, exceeding half the length of body, antennomere 1 long and swollen, antennomere 2 short, shorter than half the length of antennomere 1, antennomere 3 slightly shorter than antennomere 1, antennomere 4 subequal to antennomere 1, antennomere 5 equal to 6 in length, and two-thirds as long as antennomere 4, antennomeres 7-10 equal to each other in length and slightly shorter than antennomere 5, antennomere 11 slightly longer than antennomere 5 and apex acute, antennomeres 1-4 sparsely punctate and pubescent, antennomeres 5-11 densely punctate and pubescent.

Thorax: PW/PL = 1.5-1.6; anterior margin slightly flattened; posterior margin arching backwards medially; length of anterior margin nearly equal to posterior margin; anterior and posterior groove indistinct; lateral sides subparallel at anterior portion, then gradually expanding in the middle, strongly constricted posterior to the middle; lateral tubercle prominent and blunt; with a shallow oblique groove behind the lateral tubercle to basal portion; disc convex, with fine punctures and pubescence, basal portion slightly depressed; basal portion of each side slightly prominent. Scutellum trapezoid, slightly emarginate at apex, densely punctate and pubescent.

Elytra: EL/EW = 1.6-1.7; elongate, elytral humeri projecting antero-laterally, humeral groove somewhat deep; lateral sides subparallel; disc slightly flattened, base slightly prominent and posterior slightly depressed, base densely punctate and pubescent, apex coarsely punctate and pubescent; suture with one row of punctures and pubescence; epipleura narrow, base with two rows of punctures and pubescence, apex with one row of punctures and pubescence.

Abdomen and legs: underside sparsely punctate and pubescent. Legs moderately long, femora robust, mid- and hind-tibiae slightly curved. Pygidium moderately long, apex portion exposed. Last abdominal ventrite with apical margin slightly prominent. Median lobe flattened, slightly curved in lateral view, sides and apex sclerotized, dorso-central portion with one sclerite from base to apical portion, sides moderately thick, apical portion tongue-shaped, apex sharp; median struts rod-shaped, widely separated from each other, approximately 2.8 × as long as median lobe; basal portion of tegmen Y-shaped, tegminal ring sub-round, paramere trapezoid, apical margin of paramere slightly emarginate in middle, lateral sides with setae; endophallus membranous, with paired granulated and sclerotized area. Spiculum Y-shaped, apical margin trifid.

Distribution.

China (Yunnan).

Host plant.

Unknown.

Etymology.

The specific name trifasciata refers to the transverse bands on the elytra.

Remarks.

This species is similar to Zeugophora (Pedrillia) formosana Gressitt, 1945 in having the transverse bands on the elytra, but differs in having the antennae elongate, the lateral sides of the elytra subparallel, the base of the pronotum without a distinct transverse groove (antennae shorter, lateral sides of elytra gradually expanding posteriorly from the base, broadest behind the middle, and the base of the pronotum with a transverse groove in Z. (P.) formosana ).

This species is also similar to Zeugophora (Pedrillia) pallidicinata Gressitt, 1945 in color, but differs in having the elytra elongate and the lateral sides subparallel (elytra broad and short, the lateral sides expanding posteriorly from the base, widest behind the middle in Z. (P.) pallidicinata ).

The median lobe of this species is distinct with the dorsal portion of the median lobe having a long triangular sclerite (Figs 62 , 63 ).

Figures

Figures 58 - 61. Holotype of Zeugophora (Pedrillia) trifasciata sp. nov., male 58 dorsal view 59 ventral view 60 head, anterior view 61 pronotum, dorsal view. Scale bars: 1.0 mm (58, 59); 0.5 mm (60, 61).

Figures 62 - 66. Holotype of Zeugophora (Pedrillia) trifasciata sp. nov., male genitalia 62 median lobe and median struts, lateral view 63 median lobe, dorsal view 64 tegmen, dorsal view 65 spiculum, dorsal view 66 sclerotized area of endophallus. Scale bars: 0.5 mm (62, 64); 0.2 mm (63, 65, 66).