PANDERiCHTHYS
OSTEOlEPtS
EARLY
CHOROATE
WORM GNATHOSTOME
GYROPTYCHIUS
ICHTHYOSTEGA
Acanthosteqa
Tiktallik
Pederpes
Brouffia
Paleothyris
Gephyrosteus
watsoni
Utegenia
Eldeceeon
GEPHYROSTEGUS
Westlothiana
Silvanerpeton
Hylonomus

Elliotsmithia
Coelostegus
Protorothyris