Paleospinacidae is an extinct family of prehistoric sharks in the extinct order
Synechodontiformes
Synechodontiformes is an extinct order of prehistoric sharks, known from the Permian to the Paleogene. They are considered to be members of Neoselachii, the group that contains modern sharks and rays. Their placement in the group is uncertain, s ...
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Prehistoric cartilaginous fish families
Permian first appearances
Paleogene extinctions
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