Rock unit

Portland Formation

18 dinosaur genera in Omnisaura with fossils from the Portland Formation, oldest first. See all rock units.

Anchisauripus(Lull 1904)
Footprints and traces247–125.77 million years ago
AnomoepusHitchcock 1848
Footprints and traces237–161.5 million years ago
Eubrontes(Hitchcock 1845)
Footprints and traces237–100.5 million years ago
GrallatorHitchcock 1858
Footprints and traces237–100.5 million years ago
OtozoumHitchcock 1847
Footprints and traces237–174.7 million years ago
ArgoidesHitchcock 1845
Footprints and traces227.3–192.9 million years ago
KayentapusWelles 1971
Footprints and traces227.3–161.5 million years ago
PlatypternaHitchcock 1845
Footprints and traces227.3–192.9 million years ago
PlesiornisHitchcock 1858
Footprints and traces227.3–192.9 million years ago
SauropusHitchcock 1845
Bones227.3–192.9 million years ago
AnchisaurusMarsh 1885
Bones201.4–192.9 million years ago
AnticheiropusHitchcock 1865
Footprints and traces201.4–192.9 million years ago
MegalosaurusParkinson 1822
Bones201.4–113.2 million years ago
PlectropternaHitchcock 1845
Footprints and traces201.4–192.9 million years ago
PlectropusHitchcock 1845
Footprints and traces201.4–192.9 million years ago
SelenichnusHitchcock 1858
Footprints and traces201.4–192.9 million years ago
TrihamusHitchcock 1862
Footprints and traces201.4–192.9 million years ago
XiphopezaHitchcock 1848
Footprints and traces201.4–192.9 million years ago