Vyazonemoura Sinitshenkova & Yan, 2025

Sinitshenkova, Nina D. & Yan, Evgeny V., 2025, The unusual stonefly wing from the Upper Permian of the Orenburg Region of Russia: a new genus and species Vyazonemoura storozhenkoi gen. et sp. nov. (Insecta: Plecoptera, Palaeonemouridae), Zootaxa 5715 (1), pp. 441-445 : 442-443

Vyazonemoura Sinitshenkova & Yan , gen. nov.

Type species: Vyazonemoura storozhenkoi Sinitshenkova & Yan , sp. nov. (by the present designation).

Diagnosis. Forewings are unusually narrow, 5 times as long as wide. SC long, considerably longer than half the wing length, close to the anterior margin of the wing; c-sc very short. There are three crossveins in the costal field; in the pterostigmal region there is one oblique crossvein. RS is two-branched, divided distally to double r-rs crossveins. M two-branched, divided in the middle of the wing, CuA comb-shaped posteriorly in the distal part. Simple CuP short, A1 simple, straight, A2 two-branched with a convex anterior branch.

Remarks. The new genus is assigned to the family Palaeonemouridae due to having a straight anterior margin of the forewing, the presence of a narrow costal area with transverse veins, a long SC significantly longer than half the length of the wing, the presence of an oblique transverse vein in the pterostigmal region, the junction of R and M near the wing base, two-branched RS and M, and a short CuP.

Comparison. Vyazonemoura gen. nov. differs from other genera in the family by having narrow forewings. The comb-shaped CuA of the new genus is similar to the Triassic Cristonemoura Sinitshenkova, 1987 , belonging to the family Perlariopseidae Sinitshenkova, 1985 , from which it is clearly distinguished by the presence of two transverse r-rs crossveins, the absence of a long branch extending anteriorly from CuA , and a shorter CuP.

Etymology. The genus name is derived from the locality Vyazovka and the genus Nemoura. Gender: feminine.