Tarrasiiformes | |
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†Paratarrasius hibbardi Lund and Melton Jr. 1982 from the Mississippian (Serpukhovian) Heath Formation of Bear Gulch, Montana | |
Scientific classification![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | †Tarrasiiformes |
Families | |
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Tarasiiformes is anextinct order ofprehistoricray-finned fish.[1]
Tarrasius is an extinct genus of Tarasiiformes.Tarrasius problematicus (ofMississippian origin, ~ 350Ma) featured a fully regionalizedtetrapod-like spine divided into 5 distinct segments.[5][6] It is not considered atransitional fossil though, but an extreme example ofconvergent evolution.
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