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From
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To
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Geolocation
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Author - title
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Year
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| details | Caradocian | Europe | Paris,F. The chitinozoans in the Paleozoic of Southwest Europe. | 1981 | |
| details | Late Arenigian | England(Cumberland) | Arthurton,R.S. et al. Ordovician and Silurian. (In: Geology of the Country around Penrith.) | 1981 | |
| details | Tremadocian | USSR(Kazakh SSR) | Zaslavskaya,N.M. et al. First chitinozoa of the Late Cambrian Early Ordovician of Kazakhstan | 1987 |