“Spathicephalus is an extinct genus of stem tetrapods (early four-limbed vertebrates) that lived...Spathicephalus
“Graeophonus is an extinct genus of tailless whip scorpion described from three species found in...Graeophonus
“Arthropleura (Greek for Jointed Ribs) is a genus of extinct, 0.3–2.6 metre (1–8.5 feet) long...Arthropleura
“Eucritta melanolimnetes ("the true creature from the black lagoon") is an extinct tetrapod of...Eucritta
“Megarachne servinei is an extinct Upper Carboniferous (Pennsylvanian) eurypterid found near...Megarachne
“Pulmonoscorpius kirktonensis is a giant, extinct species of scorpion that lived during the...Pulmonoscorpius
“Crassigyrinus (meaning "thick tadpole") is an extinct genus of carnivorous stem group tetrapod...Crassigyrinus
This category has the following 2 subcategories, out of 2 total.