stankhat's channel
Loading...
5
subscribers
0
video views
Featured Playlists
The Evolution collection
Some errors in the "Before the Dinosaurs" program:
Cephalaspis was not the ancestor of gnathostomes (jawed vertebrates) or tetrapods as gnathostomes appear in the fossil record well before Cephalaspis. Furthermore, even though Cephalaspis was found only during the early Devonian, it is shown being pursued by the Late Silurian Brontoscorpio.
Diictodon, Gorgonops and Rhinesuchus are only known from South Africa, yet in episode 3 they are portrayed living with Scutosaurus, which lived only in Siberia.
In the series, Petrolacosaurus is portrayed as an ancestral amniote: one of the first "reptiles" in the traditional Linnaean sense of the word - so, from an evolutionary point of view, one of the first vertebrates which are already fully adapted to terrestrial life, but are still cold-blooded. Therefore, Petrolacosaurus is portrayed in the series as the ancestor of both synapsids (mammals) and sauropsids (modern surviving reptiles and birds). In fact, Petrolacosaurus was an early sauropsid (specifically a diapsid) and could therefore not have been the ancestor of any synapsids (e.g. Edaphosaurus). Casineria, possibly a basal amniote, would have been a more suitable candidate.
164 videos
Play all(164)
view all
164 videos
Play all(164)
Advertisement
About stankhat's channel
more
less