perekond
Periodon Hadding, 1913
| Pildid | ||||||
|---|---|---|---|---|---|---|
| GIT 164-359 | Periodon flabellum | Periodon flabellum (Lindström, 1954)  | 444 | Alam-Ordoviitsium | |||
| GIT 164-375 | Periodon | Periodon sp.  | 1024.4 - 1024.54 | | Idavere-Jõhvi Stage | |||
| GIT 164-376 | Periodon aculeatus | Periodon aculeatus Hadding, 1913  | 498.8 | Uhaku lade | |||
| GIT 164-396 | Periodon | Periodon sp.  | 404.6 | Jõhvi alamlade | |||
| GIT 164-455 | Periodon aculeatus | Periodon aculeatus Hadding, 1913  | 505.78 - 505.83 | Aseri lade | |||
| GIT 164-526 | Periodon aculeatus | Periodon aculeatus Hadding, 1913  | 498.9 | Uhaku lade | |||
| GIT 164-543 | Periodon aculeatus | Periodon aculeatus Hadding, 1913  | 489.8 - 489.83 | Uhaku lade | |||
| GIT 164-667 | Periodon flabellum | Periodon flabellum (Lindström, 1954)  | Leetse kihistu | ||||
| GIT 164-668 | Periodon flabellum | Periodon flabellum (Lindström, 1954)  | Leetse kihistu | ||||
| GIT 164-669 | Periodon flabellum | Periodon flabellum (Lindström, 1954)  | Leetse kihistu |