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Showing results for tags 'anthracosaur'.
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ThePhysicist posted a gallery image in Members Gallery
From the album: PermianHolmes (1989): "The skull and axial skeleton of the Lower Permian anthracosauroid amphibian Archeria crassidisca Cope" Art by Dmitry Bogdanov
Mississippian Subperiod stem-tetrapod footprints
LoneRanger posted a topic in Fossil Hunting TripsTook a recent collecting trip to a site that preserves stem-tetrapod, anthracosaur (reptile-like amphibian) footprints from the Mississippian subperiod. As seen in the photos, it's fairly common for these to show an overlap of front and back (manus and pes) prints. As part of the agreement for site access, I can't provide any info on geologic formation or location, but it's not the Union Chapel Mine or any other well-known Carboniferious ichnofossil site. Paleontologist Alfred Romer coined the term "Romer's gap" to describe the lack of tetrapod fossils in the earlies Carboniferous Period (r