There are 3 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 102504 | M. Clapham | Chekarda, Sylva River (Zalessky collection, Vernadsky State Museum) (coll. Zalessky, Mauer) Kungurian - Permian 2 - Russian Federation | Zalessky (1936) |
| 108206 | M. Clapham | Chekarda, Sylva River (PIN collection 1700) (coll. Sharov 1959-1961) Kungurian - Permian 2 - Russian Federation | Sharov (1968) |
| 114207 | M. Clapham | Chekarda, Sylva River (PU collection 1) Kungurian - Permian 2 - Russian Federation | Storozhenko and Aristov (1999) |