Annamosdara jianfengensis, Ji & Bai & Ren, 2025

Annamosdara jianfengensis sp. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4

Type material.

Holotype: • ♂, “ Hainan, Ledong Li Autonomous County, Mt. Jianfengling, Mingfeng Valley [海南乐东尖峰岭鸣凤谷], 2023.I.5, Fan Gao leg. ” . Paratypes: • 1 ♂, “ Hainan, Ledong Li Autonomous County, Mt. Jianfengling, Mingfeng Valley [海南乐东尖峰岭鸣凤谷], 2023.I.23, De-Yao Zhou leg. ” ; • 1 ♂, “ Hainan, Ledong Li Autonomous County, Mt. Jianfengling, Mingfeng Valley [海南乐东尖峰岭鸣凤谷], 2023.II.6, Yu-Chen Zheng leg. ” ; • 1 ♂, “ Hainan, Ledong Li Autonomous County, Mt. Jianfengling [海南乐东县尖峰岭], 2007-V-17, Yi-Bin Ba & Jun-Tong Lang leg. ” .

Description.

Body oval, strongly convex, tuberculated, brownish-grey, dull. Flightless.

Male. Head (Fig. 2 A, B, H View Figure 2 ). Strongly transverse and uneven, densely punctate and wrinkled with short setae, intervals between punctures convex, with the largest punctures between the frons and vertex; visible part of labrum broadly elliptical and covered with setae, anterior margin pubescent; clypeus buccal membrane broaden and light yellow; frontoclypeal area depressed medially, frontoclypeal suture distinct; clypeus transverse, much more depressed than frons; eyes small and protruding beyond contour of head, interocular distance approximately 3 times the eye width, distance between outer margins of eyes represents the greatest width of head; genae weakly convex, genal margins slightly sinuate; vertex convex. Mentum (Fig. 2 B View Figure 2 ) nearly subtrapezoidal; maxillary reddish, covered with pale setae, terminal segment nearly triangular. Antennae (Fig. 2 A View Figure 2 ) long, distal four antennomeres moderately dilated, forming slight club, XI oblong-oval; length ratio of antennomeres II – XI 4: 17.6: 10.8: 10.3: 10: 10.4: 11: 8.8: 9.5: 17.1; width ratio: 7: 7.7: 7.1: 7.7: 8: 8: 11: 11.9: 13.2: 15.

Prothorax. Pronotum (Fig. 2 H View Figure 2 ) transverse, length / width ratio 1.4 / 1, widest near the middle of length; surface covered with dense punctures with sparse, fine and short setae, disc strongly convex with irregular wrinkles and tubercles; anterior margin roundly protruding forward; anterior angles sharp and protruding sideways; lateral margins extended with radial keel-like ridges and approximately six prominent angles on each side; posterior margin round and protruding backwards; posterior angles widely obtuse or rounded; prothoracic hypomera covered with dense microsculpture and coarse punctures with short setae. Prosternum narrow, densely punctate and microsculptured with fine setae; prosternal process (Fig. 2 C, D View Figure 2 ) broad linguiform, densely microsculptured, wrinkled and covered with setae, convex posteriorly and sloping laterally with a small hump around the apex, apex blunt, tooth-shaped and protruding forwards anteriorly in the middle.

Pterothorax. Elytra broad-oval, almost as wide as long, strongly convex, covered with sparse and short setae, abruptly widened and sloping posteriorly, widest at middle of length; each elytron covered with eight rows of evident punctures, intervals slightly convex with irregularly-sized tubercles; base as wide as the pronotal one; humeral angles sharp and protruding forwards; epipleuron covered with sparse and large punctures with short setae, reaching elytral apex, rather broad anteriorly, strongly narrowed posteriorly. Scutellum absent. Meso- and metasternum (Fig. 2 E, F, G View Figure 2 ) narrow and rugulose with coarse punctures and setae, punctures larger and setae longer around coxae; mesosternum (Fig. 2 E View Figure 2 ) humped between mesocoxae, metasternum convex between mesocoxae.

Abdomen. Ventrites transverse and densely punctate with setae, setae in the middle longer, punctures around base larger; ventrite I forming a semi-circular process between metacoxae; ventrites III – V depressed at the base (Fig. 2 G View Figure 2 ); ventrite V not bordered at apex, covered with the largest and the densest punctures.

Legs. Long and slender, densely and coarsely punctate with setae; femora almost straight and slightly clavate; tibiae almost straight, slightly arcuate and densely pubescent near the apex; tarsi rather robust, each ultimate tarsomere not longer than the length of preceding tarsomeres combined, the preceding tarsomeres moniliform and pubescent ventrally.

Aedeagus (Figs 3 A – C View Figure 3 ). Slender, almost symmetrical, 1.9 mm in length, 0.3 mm in width; parameres lanceolate, finely punctate, widest at base and narrowing towards apex nearly straight, distal part weakly curved to ventral side in lateral view; parameres 0.6 times as long as basal pieces.

Female. Unknown.

Measurements.

Body length: ♂ 7.8–10.2 mm, width: ♂ 4.5–5.7 mm.

Diagnosis.

This new species can be readily distinguished from the type species Annamosdara multidentata Kaszab, 1941 by the following points: surface of head uneven (broad and flat in A. multidentata ); frontoclypeal area strongly depressed medially, frontoclypeal suture distinct, clypeus much more depressed than frons (frontoclypeal area slightly depressed, frontoclypeal suture not impressed, clypeus flat in A. multidentata ); eyes wider than genae (genae as wide as eyes in A. multidentata ); humeral angles sharp and protruding forwards (round and not protruding forwards in A. multidentata ).

Etymology.

The species name is derived from the type locality, Jianfeng, which is rich in various taxa of tenebrionid beetles.

Distribution.

China: Hainan Island.