[1] The ovoid to oval, 4.3–7.6 mm long, and 2.9–7.1 mm wide seeds have a slightly wrinkled testa.

[1] It has been proposed to place it in a separate genus Irtyshenia P.I.

published by Pavel Ivanovich Dorofeev in 1972.

[3][4] Later it was proposed to place it in the genus Pseudoeuryale P.I.

[5][6] Fossils of E. tenuicostata occur in what is now Russia.