“Elegestolepis was a Shark from the Silurian and is the earliest shark known. All that has been...Elegestolepis
“Eoarthropleura was a genus of millipede-like creatures which lived between the Late Silurian and...Eoarthropleura
“Brontoscorpio anglicus ("English thunder scorpion") was a 1-metre long aquatic scorpion that...Brontoscorpio
“Orthoceras ("straight horn") is a genus of extinct nautiloid cephalopod. This genus is sometimes...Orthoceras
“Pterygotus is the second-largest known eurypterid, or sea scorpion and one of the largest...Pterygotus
“Eurypterus is an extinct genus of sea scorpion of the late Silurian period, inhabiting muddy...Eurypterus
This category has the following 5 subcategories, out of 5 total.