Paleosepharia quadricavata ( Chen et al., 1976 ), 2025

Paleosepharia quadricavata ( Chen et al., 1976) comb. nov.

Figs 8 View Figure 8 , 9 View Figure 9 , 10 View Figure 10

Monolepta quadricavata Chen, 1976: 205. TL: China, Xizang; TD: IZCAS.

Type material.

Holotype: • ♂, China, Xizang Province, Chayu, Shama , 1600 m a. s. l., 20 Jul. 1973, Fusheng Huang leg. IZCAS.

Other specimens examined.

• 1 ♂, China, Yunan Province, Nujiang, Fugong County, Lumadong , 1200 m a. s. l., 11 Aug. 2024, Chuan Feng leg. IZCAS ; • 2 ♀♀, Yunan Province, Fugong County, Maji, Majimi , 1505 m a. s. l., 26 Aug. 2005, Hongbin Liang leg. IZCAS ; • 1 ♂, China, Xizang Province, Motuo County, Beibeng, Badeng , 1410 m a. s. l., 24 Jul. 2024, Chuan Feng leg. IZCAS ; • 2 ♂♂, China, Xizang Province, Bomi County, Yigong , 2050 m a. s. l., 8 Aug. 2024, Chuan Feng leg. IZCAS ; • 4 ♂♂, China, Xizang Province, Motuo County, Beibeng , 799 m a. s. l., 19 Aug. 2015, Jian Yao leg. IZCAS ; • 5 ♂♂, China, Xizang Province, Motuo County, Beibeng , 799 m a. s. l., 19 Aug. 2015, Hongbin Liang & Zhengzhong Huang leg. IZCAS ; • 5 ♂♂, China, Xizang Province, Motuo County, Ximohe , 707 m a. s. l., 17 Aug. 2015, Jian Yao leg. IZCAS ; • 1 ♀, China, Xizang Province, Motuo County, 900 m a. s. l., 27 Aug. 1982, Yinheng Han leg. IZCAS .

Notes.

The species is transferred from Monolepta to Paleosepharia based on the following characters: the third antennomere longer than the second; depression in the elytra; aedeagus parallel-sided in the basal two-thirds, apical third strongly narrowed; tectum long, rounded at apex.

Diagnosis.

This species is easy to distinguish from other species based on the elytra red or reddish-brown, with a large, deep concavity near suture in male.

Redescription.

Male: Length: 4.2–5.0 mm, width: 2.0– 2.4 mm (mean length 4.6 mm, mean width 2.1 mm, N = 19).

General color red or reddish-brown, head black, pronotum yellow, antennae and legs brown.

Vertex with sparse punctures. Frontal tubercles transverse, extending downward between antennal bases. Antennae slender, equal to length of body. First antennomere shiny bare, rod-shaped, second to eleventh antennomeres with short hairs, second antennomere shortest, third antennomere about 1.3 × as long as second; fourth antennomere about twice as long as third, fifth antennomere about 1.2 × as long as fourth, sixth to eleventh antennomeres equal in length to fourth. Pronotum about 1.4 × as wide as long, lateral margins straight, basal border slightly concaved in middle, apical border straight, disc with lateral fovea and dense minute punctures. Scutellum triangular, smooth, impunctate. Elytra wider than pronotum, humeri convex, with large, deep concavity near suture at basal 1 / 3, disc with dense, minute punctures. Elytral epipleuron broad at base, gradually narrowed from middle to apex. Each tibia with distinct spur at apex, segment 1 of hind tarsi longer than remaining segments combined. Aedeagus robust, close to outsole shape in dorsal and ventral views, moderately recurved at apex in lateral view. Lateral spiculae short and curved, ventral spiculae comb-shaped, and median spiculae long.

Female: Length: 4.2–5.0 mm, width: 2.1–2.6 mm (mean length 4.7 mm, mean width 2.3 mm, N = 3).

Third antennomere about 1.6 × as long as second; fourth antennomere about 1.6 × as long as third. Elytra only with one slight depression at basal 1 / 3. Spermatheca with big and rounded nodulus, middle part short, cornu short and slightly curved. Vaginal palps with wide base and rounded apex, each palp slightly narrowing posteriorly, with 5 setae placed at apex, additional 2 setae subapically.

Distribution.

China: Yunnan, Xizang; Nepal.

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