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Triodus
ver. 1.0

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Order Xenacanthiformes BERG, 1955A
Family Xenacanthidae  FRITSCH, 1889
Genus Triodus JORDAN, 1849

Triodus sp.: Permian, Odernhien, Germany




Xenacanthus
ver. 1.0



Order Xenacanthiformes BERG, 1955A
Family Xenacanthidae  FRITSCH, 1889
Genus Xenacanthus BEYRICH, 1848

Xenacanthus texensis (COPE, 1884): Lower Permian, Wellington Formation, Jefferson county, Oklahoma

20 mm W

Xenacanthus angatubensis WEHMUTH RAGONHA, 1984: Permian, Corumbatai Formation, Sao Paulo State, Brazil

12 mm W

20120110



Symmorium
ver. 1.1



Order Symmoriiformes ZANGERL, 1981
Family Symmoriidae DEAN, 1909
Genus Symmorium COPE, 1893

Symmorium sp.: Middle Mississippian, Harrodsburg and Salem (s) Limestone Formation, Washington County, Indiana


Symmorium sp.: Middle Mississippian, Harrodsburg and Salem (s) Limestone Formation, Washington County, Indiana


Symmorium sp.
a; Upper Mississippian, Haney Limestone Formation, English County, Indiana,
b; Middle Mississippian, Muldraugh Formation, Hardin County, Kentucky,
c; Pennsylvanian, Stark Shale, Kansas city, Missouri.

20111004


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Fumio Nakagawa

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