Eumorphus qiujianyuei, Chang, Ling-Xiao & Ren, Guo-Dong, 2017

Chang, Ling-Xiao & Ren, Guo-Dong, 2017, Two new Oriental species of Eumorphus Weber (Coleoptera, Endomychidae), ZooKeys 677, pp. 1-9 : 3

Eumorphus qiujianyuei sp. n. Figs 2, 4

Type material.

Holotype, male, Hainan, Wuzhishan, 21.V.2014, Jian-Yue Qiu leg. (MHBU).

Diagnosis.

Eumorphus qiujianyuei is similar to Eumorphus austerus austerus in appearance, but can be differentiated based on the following combination of characters: posterior angles of pronotum strongly and acutely produced, with tips curved inwardly (in E. austerus austerus posterior angles of pronotum weakly produced); sides of pronotum undulate (in E. austerus austerus rather smooth); and mesotibiae gently curved distally from near 1/2 length (in E. austerus austerus abruptly and strongly curved distally from near 1/2 length).

Description.

Length 12.3 mm. Body broadly oval, approximately 1.8 times as long as wide; moderately convex; shiny. Colour brown with four yellow maculae on elytra. Antenna with scape red. Femora at apical 1/2 or 1/3 red.

Head. Antenna composed of 11 antennomeres, long, rather slender, nearly 1/2 body length, with antennomeres 3-8 distinctly longer than wide; scape approximately 4.5 times as long as pedicel; pedicel short, subquadrate; antennomere 3 distinctly longer than 4−5 combined; antennomere 4 slightly longer than 5, antennomeres 5-8 subequal in length; club composed of three antennomeres, moderately broad, flat. Maxilla with terminal palpomere prolonged, nearly 2.0 times as long as palpomere 3, cylindrical, weakly curved distally.

Thorax. Pronotum 2.4 mm long, 4.9 mm wide; widest at base; finely, rather densely punctate; lateral and anterior margins narrowly bordered; anterior edge with small stridulatory membrane; sides undulate, distinctly converging from apical 1/3 to apex, abruptly widened basally from 1/5 length; anterior angles distinctly produced, rather acute; posterior angles strongly, acutely produced, with tips curved inwardly; disc weakly convex; median furrow absent; lateral sulci linear, deep, extending to basal ¼ length; basal sulcus nearly straight, deep. Prosternal process moderately widely separating procoxae; subparallel, weakly widening before apex then abruptly converging apically. Mesoventral process transverse rectangle, parallel sided, flat; posterior margin nearly straight. Elytra 8.9 mm long, 6.7 mm wide; 1.3 times as long as pronotum; 1.4 times as wide as pronotum, sides curved, widest near 1/2 length of elytron; lateral margins moderately widely flattened, nearly 1/5 of elytral width; distinctly converging from apical 1/3 to apex; finely, densely punctate; humeri weakly prominent. Each elytron with two small round spots. Anterior elytral spot occupies about 1/4 of elytral width, located posterior to humerus. Posterior spot of the same size as anterior one, located at apical 1/4. Protibiae in male with one large, sharp tooth near 1/2 length at inner edge, strongly expanded basally; mesotibiae distinctly curved distally from near 1/2 length; metatibiae simple, acutely produced apically.

Abdomen with five ventrites. Ventrite 5 with lateral margins strongly converging posteriorly, posterior margin deeply, narrowly emarginate medially. Aedeagus (Fig. 4) rather long, heavily sclerotized, weakly curved basally, abruptly widened from basal 1/3 to apex. Median lobe branched apically; the long branch abruptly raised at basal 1/3, strongly reflexed apically. Tegmen basal, comparatively large, ring-shaped.

Etymology.

This new species is dedicated to Ms. Jian-Yue Qiu, an insect researcher from Chongqing, who has been working on classification of insects for many years, collecting and providing many specimens of Endomychidae used in our studies.