| Abstract: | Acanthodian («Shark-like spiny fishes) scaleshave been collected in three Uppermost Silurian-Lowermost Devonian localities from Algeria, southeastern Turkey and Thailand, in association with agnathan remains (heterostracans in Algeria, thelodonts in Thailand). These vertebrate microremains are the oldest ones for those three countries. They were associated with marine invertebrate faunas and are supposed to have lived in littoral environments. Their world-wide biogeographical distribution by the Silurian-Devonian boundary leads to analyse the palaeogeographical relations of north-Atlantis and Siberia on one hand, with southern Europe, southeastern Asia and Gondwanaland on the other hand. |
