Gephyrostegids, seymouriamorphs and diadectomorphs were land-based, reptile-like amphibians, while embolomeres were aquatic amphibians with long body and short limbs.
Their anatomy falls between the mainly aquatic Devonian labyrinthodonts and the first reptiles.
University of Bristol paleontologist Professor Michael J. Benton gives the following characteristics for the Reptiliomorpha (in which he includes embolomeres, seymouriamorphs and diadectomorphs):
narrow premaxillae (less than half the skull width)
vomers taper forward
phalangeal formulae (number of joints in each toe) of foot 2.3.4.5.4–5
Gephyrostegids, seymouriamorphs and diadectomorphs were land-based, reptile-like amphibians, while embolomeres were aquatic amphibians with long body and short limbs. Their anatomy falls between the mainly aquatic Devonian labyrinthodonts and the first reptiles. University of Bristol paleontologist Professor Michael J. Benton gives the following characteristics for the Reptiliomorpha (in which he includes embolomeres, seymouriamorphs and diadectomorphs):
narrow premaxillae (less than half the skull width)
vomers taper forward
phalangeal formulae (number of joints in each toe) of foot 2.3.4.5.4–5
Reptiliomorpha