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Description

1-Nome: Ptychodus mortoni (I think this is the big one)
2-Formation: Niobrara Formation, West Interior Sea, 83 Mya.
3-Length: 9 meters
4-Weight: 7.400 Kg
5-Diet: Durophagous, feeding specially on large ammonites and bivalves.
6-Classification: No one cares about fish systematics.

Discussion: this would be a gentle giant in the WIS unless if you were a large mollusk, with a good number of large cephalopods and bivalves in the cretaceous seas giant durophagous sharks evolved to feed on this supply, and the biggest of them Ptychodus mortoni lived in the Niobrara Formation.

Reference: DiBgd Ptychodus mortoni

Description

1-Nome: Ptychodus mortoni (I think this is the big one)
2-Formation: Niobrara Formation, West Interior Sea, 83 Mya.
3-Length: 9 meters
4-Weight: 7.400 Kg
5-Diet: Durophagous, feeding specially on large ammonites and bivalves.
6-Classification: No one cares about fish systematics.

Discussion: this would be a gentle giant in the WIS unless if you were a large mollusk, with a good number of large cephalopods and bivalves in the cretaceous seas giant durophagous sharks evolved to feed on this supply, and the biggest of them Ptychodus mortoni lived in the Niobrara Formation.

Reference: DiBgd Ptychodus mortoni