Morphology of Palaeospondylus shows affinity to tetrapod ancestors - Nature - Alert Breaking News - United States
Alert Breaking News - US,
Traquair, R. H. On the fossil fishes at Achanarras Quarry, Caithness. Ann. Mag.
Traquair, R. H. On the fossil fishes at Achanarras Quarry, Caithness. Ann. Mag.
Traquair, RH On fossil fish at the Achanarras Quarry, Caithness. Anna. Mag Nat.
What does a mouse have in common with a cartilaginous fish known as a little skate? At first glance, you might think not much.
Teeth are subject to a lot of wear and tear, so it makes sense to be able to replace them during the lifetime of the animal.