Archeria vertebra (A. crassidisca) from the late Pennsylvanian sub-period
Tag: Texas
Dimetrodon limbatus (specimen 02)
Partial dimetrodon sail spine process (D. limbatus) from the early Permian period
Dimetrodon limbatus (specimen 01)
Juvenile dimetrodon claw (D. limbatus) from the early Permian period
Kritosaurus navajovius (specimen 32)
Kritosaurus zygopothesis process (K. navajovius) from the late Cretaceous period
The Fossil Ark 