Pseudognaptorina rectangularis X.-M. Li 2025, sp. nov.
Creators: name: Li, Xiu-Min
name: Zhang, Bao-Yue
name: Li, Ji-Gang
name: Pan, Zhao
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Tenebrionidae
Pseudognaptorina
Pseudognaptorina rectangularis

description: Pseudognaptorina rectangularis X.-M. Li sp. nov.
Type materials.
Holotype: China • ♂ (MHBU HBU (E) 339929): Hongyuan County, Sichuan / 32°01.96'N, 102°01.99'E / Alt. 3451 m / 2021-VII-20 / Xiu-Min Li leg.
Description.
Male (Figs 13, 14 A – C). Body length 12.6 mm, width 6.2 mm; shiny, black; antennae, palpi, and tarsi brown.
Head (Fig. 13 A, B). Anterior margin of clypeus slightly sinuate. Head widest at eye level. Lateral margin of head with pair of projections between antennal base and oculus, brownish red. Genal margin arcuately converging before eyes. Eyes barely protruding beyond contour of head. Vertex flat or slightly convex, with uniform punctures. Antennae (Fig. 13 D) slender, long, and reaching pronotal base when posteriorly extended; antennomere III very long, 2.9 times as long as antennomere II; antennomeres VIII – X oval; XI spindle-shaped. Length (width) ratio of antennomeres II – XI as follows: 10.9 (9.4): 27.1 (10.7): 14.8 (10.0): 16.2 (10.0): 15.5 (10.0): 18.9 (10.0): 15.1 (11.5): 13.9 (13.3): 13.9 (13.3): 15.2 (13.9).
Prothorax. Pronotum (Fig. 13 C) transverse, 1.52 times as wide as long, widest in middle, 1.84 times as wide as head. Ratio of width on anterior margin to its maximum width and posterior margin 0.55: 1.00: 0.97. Lateral margins of pronotum arcuately narrowing to anterior margin, bordered along entire length; posterior margin straight; anterior margin slightly emarginate; anterior angles widely, obtusely angled; posterior angles almost rectangular. Surface of pronotum very narrowly flattened along lateral margins from base nearly to anterior angles, covered with dense punctation. Hypomera covered shallow longitudinal wrinkles and granules; inner part covered with longitudinal rugae. Prosternum gently sloping before procoxae. Prosternal process gently sloping behind procoxae, forming obtuse projection.
Pterothorax. Elytra oblong-oval and convex, 1.31 times as long as wide, 1.43 times as wide as pronotum, widest at apical third. Dorsal surface of elytra passing into outer (deflexed) surface without traces of humeral carina. Outer margin of epipleura visible in dorsal view at basal third and apex. Surface of elytra with dense, rather smooth punctation and wrinkles almost vanishing on apical declivity.
Legs (Fig. 13 E – J). Femora and tibiae moderately thickened. Ratio of length (width) of pro-, meso-, and metatibiae: 57.2 (9.2): 59.1 (9.4): 77.9 (10.3). Protibiae straight with shorter spur, inner surface of protibiae nearly flat; mesotibiae slightly curved; metatibiae slightly curved. Ventral surface of protarsomeres I – III with hairy brush; ventral surface of mesotarsomeres I – II with hairy brush. Ratio of length (width) of metatarsomeres I – IV: 34.5 (9.7): 22.5 (10.0): 22.8 (10.0): 31.9 (7.7).
Aedeagus (Fig. 13 K – O). Length of aedeagus 2.18 mm, width 0.46 mm; length of parameres 0.79 mm, width 0.31 mm. Slightly curved to ventral side apically in lateral view. Parameres strongly elongate, widest at base, regularly narrowing towards apex; outer margins slightly curved to ventral side apically in lateral view. Spiculum gastrale as in Fig. 13 K. Posterior margin of abdominal sternite VIII sinuate (Fig. 13 O).
Diagnosis.
This new species is morphologically similar to P. flata, but can be distinguished from it by the following male character states: pronotum transverse, 1.52 times as wide as long, surface flatted, posterior angles nearly rectangular (pronotum transverse, 1.36 times as wide as long, surface explanate and slightly concave, posterior angles obtusely rounded in P. flata); ventral surface of mesotarsomeres I – II with hair brushes, mesotarsomere III with small hairy tuft (ventral surface of mesotarsomeres I – III with hair brushes in P. flata).
Etymology.
This species is named from the Latin adjective “ rectangularis ”, in reference to its sub-rectangular prothorax.
Distribution.
Hongyuan County, Sichuan, China.
description: Published as part of Li, Xiu-Min, Zhang, Bao-Yue, Li, Ji-Gang & Pan, Zhao, 2025, Systematic review of the genus Pseudognaptorina Kaszab, 1977 (Coleoptera, Tenebrionidae, Blaptinae, Blaptini) from the Qinghai-Xizang Plateau, with description of six new species, pp. 19-46 in ZooKeys 1234 on pages 19-46, DOI: 10.3897/zookeys.1234.137739