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Some of Pennsylvania's most important fossil finds were made in the state's Devonian rocks. [2] Carboniferous Pennsylvania was a swampy environment covered by a wide variety of plants. The latter half of the period was called the Pennsylvanian in honor of the state's rich contemporary rock record. By the end of the Paleozoic the state was no ...
This list of the prehistoric life of Pennsylvania contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of ...
This list of the Paleozoic life of Pennsylvania contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Pennsylvania and are between 538.8 and 252.17 million years of age.
Triceratops (/ t r aɪ ˈ s ɛr ə t ɒ p s / try-SERR-ə-tops; [1] lit. ' three-horned face ') is a genus of chasmosaurine ceratopsian dinosaur that lived during the late Maastrichtian age of the Late Cretaceous period, about 68 to 66 million years ago in what is now western North America.
Ankylosaurus [nb 1] is a genus of armored dinosaur. Its fossils have been found in geological formations dating to the very end of the Cretaceous Period, about 68–66 million years ago, in western North America, making it among the last of the non-avian dinosaurs. It was named by Barnum Brown in 1908; it is monotypic, containing only A ...
Triceratops horridus: BMRP 2006.4.1 Homer Burpee Museum of Natural History: Rockford: Illinois: USA: Sub-adult specimen Skull Triceratops horridus: FMNH P12003 Field Museum of Natural History: Chicago: Illinois: USA: Skeleton, mounted Triceratops prorsus: CM 1219 Carnegie Museum of Natural History: Pittsburgh: Pennsylvania: USA: Skeleton ...
The clade Ceratopsidae was in 1998 defined by Paul Sereno as the group including the last common ancestor of Pachyrhinosaurus and Triceratops; and all its descendants. [17] In 2004, it was by Peter Dodson defined to include Triceratops, Centrosaurus, and all descendants of their most recent common ancestor. [18]
A controversial ceratopsian possibly synonymous with Triceratops [57] Torosaurus [8] [38] T. latus [8] [38] Montana [38] North Dakota [9] [40] South Dakota [9] [39] Upper Hell Creek Formation [10] A ceratopsian that was once proposed to be synonymous with Triceratops, [58] but is now regarded as a valid and distinct ceratopsian. [59] A rare ...