![]() | This article may be too technical for most readers to understand.(April 2021) |
Stegopodus Temporal range: Late Jurassic, | |
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Life restoration of Stegosaurus , the possible trackmaker of Stegopodus | |
Trace fossil classification ![]() | |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Clade: | † Ornithischia |
Clade: | † Thyreophora |
Suborder: | † Stegosauria |
Family: | † Stegosauridae |
Ichnogenus: | † Stegopodus Lockley, Hunt & Foster, 1998 [1] |
Type ichnospecies | |
†Stegopodus czerkasi Lockley, Hunt & Foster, 1998 [2] |
Stegopodus is an ichnogenus erected in 1998 for the second set of stegosaur tracks from the Morrison Formation. The tracks were found near Arches National Park, also in Utah. Unlike the first, this trackway preserved traces of the forefeet. Fossil remains indicate that stegosaurs have five digits on the forefeet and three weight-bearing digits on the hind feet. From this, paleontologists were able to successfully predict the appearance of stegosaur tracks in 1990, six years in advance of the first actual discovery of Morrison stegosaur tracks. Since the erection of Stegopodus, more trackways have been found, however none have preserved traces of the front feet, and stegosaur traces remain rare. [3]
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: CS1 maint: postscript (link)Sauropoda, whose members are known as sauropods, is a clade of saurischian ('lizard-hipped') dinosaurs. Sauropods had very long necks, long tails, small heads, and four thick, pillar-like legs. They are notable for the enormous sizes attained by some species, and the group includes the largest animals to have ever lived on land. Well-known genera include Brachiosaurus, Diplodocus, Apatosaurus and Brontosaurus.
Stegosauria is a group of herbivorous ornithischian dinosaurs that lived during the Jurassic and early Cretaceous periods. Stegosaurian fossils have been found mostly in the Northern Hemisphere, predominantly in what is now North America, Europe, Africa, South America and Asia. Their geographical origins are unclear; the earliest unequivocal stegosaurian, Huayangosaurus taibaii, lived in China.
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Dinehichnus is an ichnogenus found in the Morrison Formation that is attributed to dryosaurid dinosaurs. The trackways are present in Saltwash Member outcrops at Boundary Butte in southernmost Utah. Dinehichnus trackways are frequently found in groups, traveling parallel to one another. From this it can be inferred that the Dinehichnus trackmaker was a social animal. Dinehichnus tracks preserve impressions of three widely splayed toes on feet that point inwardly, as well as heel marks.
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Anticostiodus is an extinct genus of multielement conodonts. Specimens have been described from the Lower Silurian of Gun River Formation of Anticosti Island, Quebec. Two species are included under the genus, Anticostiodus fahraeusi and Anticostiodus boltoni. Both species occur near the base of the Distomodus staurognathoides zone and in an open subtidal environment.
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Mesogondolella is an extinct genus of conodonts.
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Oulodus is a genus of conodonts in the family Prioniodinidae.
Cancelloceras is an extinct genus of ammonites in the family Gastrioceratidae. Species are from the Carboniferous.
Palaeophasianus is an extinct genus of flightless Geranoididae birds that lived in North America during the Eocene period. Robert Wilson Shufeldt classified Palaeophasianus as a galliform when he described it in 1913. However it was transferred to Cracidae in 1964 by Pierce Brodkorb, while Joel Cracraft in 1968 placed it in Gruiformes.