Ladatheca annae (FOSSIL) (A.V. Sysoev, 1959 †) Russia, Yakutia
Spinulitheca billingsi (FOSSIL) (A.V. Sysoev, 1962 †) Russia, Yakutia
Malykanotheca cuspidata (FOSSIL) Meshkova, 1974 † Russia, Yakutia
Spinulitheca secunda (FOSSIL) (A.V. Sysoev, 1968 †) Russia, Yakutia
Aldanotheca sulcata (FOSSIL) Meshkova, 1974 † Russia, Yakutia