One of Archelon's most notable features was its shell

and a long

approximately 70-65 million years ago

enjoying their underwater feast

1:35 scale - 188 mm long

Diictodon siblings Scale:1:5 One of Archelon's most notableDiictodon siblings is the name of an extinct species of therapsids, a group of animals that shared characteristics of both reptiles and mammals and that lived during the Permian period, approximately 260 million years ago. This particular species belonged to a subgroup of therapsids known as dicynodonts, which were characterized by having turtle like beaks and teeth specialized for crushing plants. The name "Diictodon" means "double tooth", referring