Trirogma lobusicurvus Liu et Li 2024, sp. nov.

Trirogma lobusicurvus Liu et Li, sp. nov. LSIDurn:lsid:zoobank.org:act: 2ACEB082-12D3-40AC-8E8D-9522191A5F8C Figs 1A–I, 2A–I Material examined: Holotype: ♀, China: Guangdong, Qingyuan, Yangshan, Nan Mountain, 24°28′N, 112°34′E, 2007.X.16–18, Zaifu Xu. Paratype: 1♀, China: Yunnan, Jinghong, Menghai, Bulang Mountain, 21°37′N, 100°23′E, 2021.X.15, Yongsheng Pu; 1♂, China: Yunnan, Yuxi, Xinping, Mopan Mountian, 23°56′N, 101°58′E, 2020. VIII.9–IX.9, Zhizhi Liu. Diagnosis. The new species clearly differs from T. caerulea Westwood, 1841 by the following characteristics: basal margin of frontal lobe extended on both sides, forming curve, folded lobe-like projection (margin of base of frontal lobe not extended in T. caerulea); posterolateral tubercles of pronotal collar slightly raised, not sharp (posterolateral tubercles of pronotal collar strongly raised and sharp in T. caerulea); notaulus not crenulate (notaulus crenulate in T. caerulea); upper mesopleural groove not crenulate (upper mesopleural groove crenulate in T. caerulea); male scutellum without projection (male scutellum with a cone-like projection at middle in T. caerulea); sternaulus lacked (sternaulus present in T. caerulea). Description. Female. Body length 17–20 mm. Body with bright metallic blue and purple luster. Mandible black, reddish brown at apex; antennae black except scape metallic blue; wings hyaline, veins and stigma dark brown; legs metallic blue, claws reddish brown. Body with white, long setae, dense on clypeus, gena and mesosoma ventrally. Head. Mandible sharp at apex, with three small, blunt, inner teeth. Clypeus convex basally, transversely concave medially, anterior margin with arc-shaped prominence, slightly upturned medially (Fig. 1B). Frons with large, dense punctures. Frontal lobe ‘U’ shaped, margins of base extended on both sides, forming curve, folded lobe-like projection; frontal line long, incomplete, slightly impressed (Fig. 1B). Ratio of ID: F1 = 23: 26. Ocelli in triangle with a deep posterior groove. Vertex and gena with small to midsize, sparse punctures (Figs 1B, C). Antennae twelve segments, ratio of F1: F2+F3 = 26: 41. Mesosoma. Pronotum with small to midsize, sparse punctures; posterolateral tubercles of pronotal collar slightly raised, not sharp (Fig. 1D); propleurum with sparse, fine punctures and several distinct, long and oblique carinae on each side (Fig. 1E); prosternum with midsize, sparse punctures. Scutum with small, dense punctures; notaulus complete, not crenulate (Fig. 1D). Mesopleuron and mesosternum with dense, fine irregular punctures; area close to omaulus with parallel groove, not crenulate; upper mesopleural groove not crenulate; sternaulus lacked (Fig. 1F). Scutellum not elevated, with small to midsize, dense punctures (Fig. 1D). Metanotum with small, dense punctures (Fig. 1G). Propodeal enclosure approximately triangular, shiny and smooth, medially with two strong, longitudinal carinae, laterally with several strong, oblique, longitudinal ruga (Fig. 1G). Posterior surface of propodeum with distinct, irregular reticulation. Lateral surface of propodeum with several short, sturdy, oblique longitudinal ruga (Fig. 1F). Wings and legs. Fore wings with three submarginal cells, vein M+Cu diverging before crossvein cu-a; hind wings with vein M+Cu diverging after crossvein cu-a (Fig. 1H). Hind coxa with a small tubercle dorsally. Metasoma. T1–T3 with fine and dense punctures; T4–T6 alutaceous. S2 with a bisinuate groove interrupted by median tubercle, not crenulate (Figs 1A, I). Male. Differs from female as follows: Body length 12 mm. Mandible with two inner teeth, mid tooth large, sharp, other one blunt and small (Fig. 2B). Clypeus approximately trapezoidal, anterior margin slightly emarginated medially (Fig. 2B). Folded lobe-like projection more distinct (Figs 2B, C). Ratio of ID: F1 = 21: 17. Gena with coarser punctures. Antennae thirteen segments, ratio of F1: F2+F3 = 11: 20. Scutum slightly concave medially and raised laterally (Fig. 2D). Scutellum slightly elevated medially (Fig. 2D). Upper mesopleural groove crenulate (Fig. 2F). Fore wings with vein M+Cu diverging at crossvein cu-a (Fig. 2H). Bisinuate groove interrupted by median tubercle on S2 crenulate. T1– T3 with midsize and dense punctures (Figs 2A, I). Distribution. China (Guangdong, Yunnan). Etymology. The specific name curvilobus originates from the Latin word “ curv- ” and “ lobus ”, refers to basal margins of the frontal lobe extended on both sides, forming curve, folded lobe-like projections.