†Proceratium petrosum Dlussky et al., 2015: 143, figs. 24, 25 (m.) RUSSIA (Sikhote-Alin, Bol’shaya Svetlovodnaya, Eocene).

Primary type information: Bol’shaya Svetlovodnaya (former Biamo) River; Pozharsky District, Primorskiy Region, SE Russia; PIN 3429/103; Paleontological Institute Nauk, Moscow