Scolytoplatypus costatus Gebhardt & Beaver sp. nov.

Fig. 1A–F, 2A

Type material. Holotype: male: CHINA, Yunnan, Puer, Jingdong, Ailoshan, 24.516N, 101.01E, 2356 m, ALS2200- 4FI, 8.v.2018, L.Z. Meng (CAS) . Paratypes: as holotype (CAS, 1f), as previous except, 24.517N, 101.012E, 2377m, FIT, ALS2200-1FI, (RAB 1m, 1f); as previous except: 24.515N, 101.011E, 2374m, ALS2200-3FI (RAB 1m); as previous except: 24.532N, 101.015E, 2499m, ALS(S)2400-2FI, (RAB 2m); as previous except: 24.517N, 101.011E, 2374m, ALS2200-3FI, 28.v.2018 (NHMUK 1m, 2f; HGT 1 f) .

Diagnosis. The species is distinguished by the lack of a tooth on the upper side of the profemur, and the presence of small spines on the interstriae of the elytral declivity. It resembles S. blandfordi Gebhardt and related species in its elongate body with elytra about 1.7‒2.0 times as long as pronotum, elytral declivity beginning in apical third of elytra, and prosternum raised in a triangle with apex anterior. It can be distinguished from all these species, except S. zahradniki Knížek, by the presence of carinate and spinose interstriae in both sexes, and the female pronotum without a mycangial pore. It is distinguished from S. zahradniki by the male prosternum anteriorly with two processes like long pointed spines with slightly outwardly curved tips (Fig. 2A), compared to two curved falcate processes in S. zahradniki (Fig. 2D).