Spiny sharks (Acanthodii) transitional to lobefins in the LRT | The Pterosaur Heresies
Fossil Record
Day 19: Cladoselache. My second shark. You can really see the resemblance of a regular fish with this guy, in the fins especially. They fossils preserve very well and as a result,
Cladoselache | Devonian, Extinct, Cartilaginous | Britannica
Introducing Cleveland's Toothiest Shark | Cleveland Museum of Natural History