-
pectoral girdle in
Petrolacosaurus is
light in
comparison to the m****ive
girdles found in taxa such as pelycosaurs.
Petrolacosaurus specimens had a clavicle...
-
Carboniferous to the
Early Permian. The
group contains the
genera Araeoscelis,
Petrolacosaurus, the
possibly aquatic Spinoaequalis, and less well-known
genera such...
- specifically, the most
inclusive clade containing Captorhinus aguti and
Petrolacosaurus kansensis but not
Procolophon trigoniceps, by
Tsuji and Müller (2009)...
- "Younginiformes" (later, more specifically,
emended to
Youngina capensis) than to
Petrolacosaurus (representing Araeoscelidia). The
earliest known neodiapsids like Orovenator...
-
appear as a
giant tarantula-like
spider hunting the cat-sized
reptile Petrolacosaurus in the
segment detailing the Carboniferous, with the reconstruction...
-
Araeoscelis (9) but more than
Petrolacosaurus (6). The
maxilla has
about 25 teeth, more than
Araeoscelis (19) but less than
Petrolacosaurus (35). The
fourth and...
- the
Joggins Formation in Nova Scotia, and
possibly New Brunswick.
Petrolacosaurus, the
earliest known diapsid reptile,
lived during the late Carboniferous...
-
Fossils of the
basal pelycosaur Archaeothyris and the
basal diapsid Petrolacosaurus are also
found in the same
region of Nova Scotia,
although from a higher...
- such as
Petrolacosaurus, in that its
teeth were
larger and blunter;
possibly they were used for
cracking insect carapaces.
Unlike Petrolacosaurus, which...
- in Kansas,
United States, was one of the
first diapsids,
along with
Petrolacosaurus. It was also the
first reptile to
return to the water,
evolving shortly...
