Definately a Platystrophia. If it's big then it's probably Platystrophia Ponderosa. Otherwise maybe a Playstrophia Clarkvillensis? Too many species and too little documentation at hand. :(
The Ordovician Period is dated to approximately 490 to 443 million years ago. So the fossils are quite OLD! The oldest fossils I know of are over 2 billion years ago (search for Kona Dolomite in Google).
Definately a Platystrophia. If it's big then it's probably Platystrophia Ponderosa. Otherwise maybe a Playstrophia Clarkvillensis? Too many species and too little documentation at hand. :(
ReplyDeletewould you like to tell me that how old these are i have some kind of these things.
ReplyDeleteThe Ordovician Period is dated to approximately 490 to 443 million years ago. So the fossils are quite OLD! The oldest fossils I know of are over 2 billion years ago (search for Kona Dolomite in Google).
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