Bones in the Amniote skull

Amniotes = vertebrate animals with a special membrane around the egg
= reptiles, birds, and mammals (or Sauropsids and Theropsids)
the dorsal (top) view
the lateral (side) view
the palatial (bottom) view
(lower jaw not shown)
The animal shown here is Cotylorhynchus, a middle Permian Caeseid pelycosaur
diagram from the Tree of Life page - external link Amniote Phylogeny © 1996 Michel Laurin and Jacques A. Gauthier

colour key

Abbreviation name of bone
Bc braincase
E epipterygoid
Ec ectopterygoid
F frontal
J jugal
L lacrimal
M maxilla
N nasal
P parietal
Pa palatine
Pm premaxilla
Pp postparietal
Po postorbital
Pof postfrontal
Prf prefrontal
Ps parasphenoid
Pt pterygoid
Q quadrate
Qj quadratojugal
S stapes
Sq squamosal
St supratemporal
T tabular
V vomer

 
 

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page history

uploaded 13 August 1999
modified 26 October