- a
thinner base, and lack serrations,
similar to O.
platypternus teeth.
Orthacanthus platypternus from the
Craddock Bonebed shark layer in Texas, USA...
- and
histology of
dorsal spines of the
xenacanthid shark Orthacanthus platypternus from the
Lower Permian of Texas, USA:
palaeobiological and palaeoenvironmental...
- have
migrated between freshwater and
marine environments.
Orthacanthus platypternus from the
Early Permian of
North America is
suggested to have been catadromous...
- and
Histology of
Dorsal Spines of the
Xenacanthid Shark Orthacanthus platypternus from the
Lower Permian of Texas, USA:
Palaeobiological and Palaeoenvironmental...
- and
histology of
dorsal spines of the
xenacanthid shark Orthacanthus platypternus from the
Lower Permian of Texas, USA:
Palaeobiological and palaeoenvironmental...
-
partial skeletons from the Sid
McAdams locality.
Orthacanthus O. cf.
platypternus Teeth, fin spines, and
skull fragments of a
common xenacanth shark. Previously...
- Jan****a? J.? sp.
Geraldine A
single petalodont tooth Orthacanthus O.
platypternus Geraldine Xenacanth shark teeth O.
texensis Geraldine,
Briar Cr****, Coprolite...
- or late Arroyo. The most
common shark remains belong to
Orthacanthus platypternus,
although teeth from
Xenacanthus luederensis are also
known from some...
- Soler-Gijón, 1997 †Orthacanthus
pinguis Fritsch, 1889 †Orthacanthus
platypternus Cope, 1884 †Orthacanthus
texensis Cope, 1888 †Orthacodus Woodward, 1889...
-
Isolated teeth. A
petalodont found in the
marine dolomite.
Orthacanthus O.
platypternus Teeth. A
freshwater xenacanth. O.
texensis Teeth. A
freshwater xenacanth...
