Sinogranulus jinsuoguanensis Fu & Huang sp. nov.

(Figs 4–7)

Material. Holotype, NIGP179639, isolated forewing, with part and counterpart; paratypes, three isolated forewings (NIGP179640 – NIGP179642); deposited in the Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China.

Etymology. The specific epithet is derived from “Jinsuoguan”, the name of a town where the specimens were discovered.

Diagnosis. Tegmen with stem R deeply forked, with 5–7 terminal branches (3–4 terminal branches in S. qishuiheensis); stem MP curved towards CuA, forked basad of basal crossvein r-mp (MP forked obviously apicad of basal crossvein r -mp in S. qishuiheensis); CuA bent strongly and very close to CuP, creating broad, spoon-shaped radial and median cells.

Type locality and horizon. A locality near Hejiafang Village, Jinsuoguan Township, Yintai District, Tongchuan City, Shaanxi Province, China; lower parts of the Yanchang Formation; Middle Triassic.

Description. Tegmen length 6.3–7.3 mm; granular ornamentations evenly distributed over tegmen surface with different diameter; with dark-colored bands distributed in radial and median cells, and mottled for its remaining part; costal margin smoothly arched, thickened; anteroapical and posteroapical angles widely rounded; apical margin rounded; outer membrane narrow; hyposubcostal carina strongly convex; basal cell short; basal crossvein cua-cup inclined; postcostal cell nearly as wide as widest portion of radial and median cells; stem R long, curved basally, then almost straight, with 5–7 terminal branches; stem MP almost straight and subparallel to R before tegminal midlength, then strongly curved toward CuA, MP with at least four terminal branches; stem CuA subparallel to MP after separated from common stem R+MP+CuA, then strongly curved and close to vein CuP at basal about 1/4 tegminal length; CuA 1 entirely fused to stem MP and crossvein mpcua replaced by free base of CuA 1; crossvein mp-cua long and inclined; CuP straight; clavus missing.