D. S. Aristov. A new family of Early Permian grylloblattids (Insecta: Grylloblattida) from Ural Mountains. – Far Eastern entomologist. 2000. N 85: 1-4.

A new grylloblattids family Sylvabestiidae fam. n. with a single species Sylvabestia tenuis gen. et sp. n. is described from Chekarda locality (Russia: Permskaya oblast').