| link
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From
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To
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Geolocation
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Author - title
|
Year
|
|---|---|---|---|---|---|
| details | Early Ashgillian | Greenland | Nиhr-Hansen,H. et al. Ordovician spores with Triletes Rays from Washington Land, North Greenland | 1988 | |
| details | Late Ordovician | Africa | Achab,A. et al. Paleobiogeography of Ordovician chitinozoans | 1988 | |
| details | Late Ordovician | Canada(Eastern) | Miller,M.A. Chitinozoa. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) | 1996 | |
| details | Ashgillian | Canada(Anticosti Island) | Paris,F. et al. A revised chitinozoan classification | 1999 |