Pseudognaptorina rectangularis X.-M. Li, 2025

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. GoogleMaps

Description.

Male (Figs 13 View Figure 13 , 14 A – C View Figure 14 ). Body length 12.6 mm, width 6.2 mm; shiny, black; antennae, palpi, and tarsi brown.

Head (Fig. 13 A, B View Figure 13 ). 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 View Figure 13 ) 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 View Figure 13 ) 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 View Figure 13 ). 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 View Figure 13 ). 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 View Figure 13 . Posterior margin of abdominal sternite VIII sinuate (Fig. 13 O View Figure 13 ).

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.