Annularia
Videos
Annularia is a form taxon, applied to fossil foliage belonging to extinct plants of the genus Calamites in the order Equisetales.
Specimen of Annularia stellata from Italy on display at the Museo Civico di Storia Naturale di Milano
The foliage of Calamites
Archer City Formation
Videos
The Archer City Formation is a geological formation in north-central Texas, preserving fossils from the Asselian and early Sakmarian stages of the Permian period. It is the earliest component of the T
Edaph boanerg 2
Ophiacodontidae Ophiacodon uniformis
Stereophallodon DB18
Bolosaurus DB15