| The base of the Silesian is undefined, the top is defined by the first appearance of the conodont Streptognathodus isolatus. |
| At one time or another, most of these have been regarded as conodont elements. |
| Late Ordovician to Early Silurian conodont faunas from the Kolyma terrane, Omulev Mountains, Northeast Russia, and their paleobiogeographic affinity. |
| In the 1990s standard conodont and miospore zonations were applied. |
| The conodont element on the left side is obvious if you are looking for it. |
| Clarkina rosenkrantzi is the only gondolellid conodont of the Dzhulfian beds of Greenland and of the Zechstein Limestone in middle and NW Europe. |
