Bertie FormationW
Bertie Formation
AcutiramusW
Acutiramus
BuffalopterusW
Buffalopterus
CeratiocarisW
Ceratiocaris
ClarkeipterusW
Clarkeipterus
ClimacograptusW
Climacograptus
CooksoniaW
Cooksonia
DolichopterusW
Dolichopterus
ErettopterusW
Erettopterus
ErieopterusW
Erieopterus
EurypterusW
Eurypterus
EusarcanaW
Eusarcana
GomphocerasW
Gomphoceras
HughmilleriaW
Hughmilleria
NerepisacanthusW
Nerepisacanthus
PlatycerasW
Platyceras
ProscorpiusW
Proscorpius
PterygotusW
Pterygotus
RhinocarcinosomaW
Rhinocarcinosoma