Triodus sp.
Permian, Odernhien, Germany
Order Xenacantida Glikman, 1964
Xenacantidae incertae sedis
Triodus Jordan, 1849
Triodus sp.
Permian, Odernhien, Germany
Order Xenacantida Glikman, 1964
Family Xenacantidae Fritsch, 1889
Xenacanthus Beyrich, 1848
20 mm H
Xenacanthus texensis
LowerPermian, Wellington Formation, Jefferson county, Oklahoma,
USA
12 mm W
Xenacanthus angatubensis
Permian, Corumbatai Formation Sao Paulo State, Brazil
Order Euselachii Hay, 1902
Superfamily Ctenacanthoidea Zangerl, 1981
Family Phoebodontidae Williams, 1979
Phoebodus St. John & Worthen, 1875
4.5 mm H
Phoebodus sp.
Middle Mississippian, Harrodsburg Limestone Fm., Washington County, Indiana
3.2 mm H
Chlamydoselachus sp.
Upper Cretaceous, Lambert Formation Hornby Island, Canada
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