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Grallator

Grallator is an ichnogenus which covers a common type of small, three-toed print made by a variety of bipedal theropod dinosaurs. Grallator-type footprints have been found in formations dating from the Early Triassic through to the early Cretaceous periods. They are found in the United States, Canada, Europe, India, Australia, Brazil and China, but are most abundant on the east coast of North America, especially the Triassic and Early Jurassic formations of the northern part of the Newark Supergroup. The name Grallator translates into "stilt walker", although the actual length and form of the trackmaking legs varied by species, usually unidentified. The related term "Grallae" is an ancient name for the presumed group of long-legged wading birds, such as storks and herons. These footprints were given this name by their discoverer, Edward Hitchcock, in 1858.

Species
Source: • Subgenus G. (Coelurosaurichnus)G. (C.) palmipesG. (C.) p. exiguus (Ellenberger, 1970) • Subgenus G. (Grallator)G. (G.) zvierzi Gierlinski, 1991 • G. andeolensis Gand, Vianey-Liaud, Demathieu, & Garric, 2000 • G. angustidigitus (Ellenberger, 1970) • G. angustus (Ellenberger, 1974) • G. a. cursor Ellenberger, 1974 • G. cursorius Hitchcock, 1858 (ichnotype) • G. cuneatus Hitchcock, 1858 • G. damanei Ellenberger, 1970 • G. deambulator (Ellenberger, 1970) • G. digitigradus (Ellenberger, 1974) • G. emeiensis Zhen, Li, Han & Yang, 1995 • G. formosus Hitchcock, 1858 • G. gracilis Hitchcock, 1865 • G. graciosus (Ellenberger, 1970) • G. grancier (Courel & Demathieu, 2000) • G. ingens (Ellenberger, 1970) • G. jiuquwanensis (Zeng, 1982) =HunanpusG. kehli (Beurlen, 1950) • G. kronbergeri (Rehnelt, 1959) • G. lacunensis (Ellenberger, 1970) • G. leribeensis (Ellenberger, 1970) • G. limnosus Zhen, Li, & Rao, 1985 • G. madseni Irby, 1995 • G. magnificus (Ellenberger, 1970) • G. matsiengensis Ellenberger, 1970 • G. maximus Lapparent & Monetnat, 1967 • G. minimus (Ellenberger, 1970) • G. minor (Ellenberger, 1970) • G. moeni (Beurlen, 1950) • G. mokanametsongensis (Ellenberger, 1974) • G. molapoi Ellenberger, 1974 • G. morijiensis (Ellenberger, 1970) • G. moshoeshoei (Ellenberger, 1970) • G. olonensis Lapparent & Monetnat, 1967 • G. palissyi (Gand, 1976) • G. paulstris (Ellenberger, 1970) • G. perriauxi (Demathieu & Gand, 1972) • G. pingchuanensis Li et al., 2019) • G. princeps (Ellenberger, 1970) • G. protocrassidigitus (Ellenberger, 1970) • G. rapidus (Ellenberger, 1974) • G. romanovskyi (Gabunia & Kurbatov) • G. quthingensis (Ellenberger, 1974) • G. rectilineus (Ellenberger, 1970) • G. sabinensis (Gand & Pellier, 1976) • G. sassendorfensis (Kuhn, 1958) • G. sauclierensis Demathieu & Sciau, 1992 • G. schlauersbachensis (Weiss, 1934) • G. socialis (Ellenberger, 1970) • G. ssatoi Yabe, Inai, & Shikama, 1940 • G. tenuis Hitchcock, 1858 • G. toscanus (Huene, 1941) • G. variabilis Lapparent & Monetnat, 1967 ==Paleopathology==
Paleopathology
Fossil tracks can be informative about theropod pathologies but apparently pathological traits may be due to unusual behaviors. Sandstone stratum dating to the Norian in southern Wales preserves tracks of an individual with a deformed digit III attributed to the ichnogenus Anchisauripus. The distal end of the digit was consistently flexed. However, this apparent pathology could be caused by the animal rotating the tip of that digit when lifting the foot. ==Occurrences==
Occurrences
Grallator-type footprints have been found in formations dating from the Early Triassic through to the early Cretaceous periods. They are found in the United States, Canada, Europe, Australia, Brazil (Sousa and Santa Maria Formations) and China, The trackmaker of Atreipus prints was a quadrupedal ornithischian. The reason for this similarity is a lack of divergence in the foot evolution of the two distinct groups of dinosaurs: ornithischians and saurischians. Moenave Formation at the St. George Dinosaur Discovery Site at Johnson Farm, southwestern Utah. Wales In January 2021, while walking with her father Richard Wilder, a four-year-old girl called Lily Wilder found a 215- to 220-million year-old dinosaur footprint at Bendricks Bay in the Vale of Glamorgan, Wales. Experts believe that the footprint was most likely left by a dinosaur (grallator) that stood about 75 centimeters (29.5 inches) tall and 2.5 meters (about 8 feet) long and walked on its two hind feet. The scientists called the girl's discovery "the finest impression of a 215 million-year-old dinosaur print found in Britain in a decade". Cindy Howells, a palaeontologist at Amgueddfa Cymru – National Museum Wales, described it as "one of the best-preserved examples from anywhere in the UK" and said that it "will really aid palaeontologists to get a better idea about how these early dinosaurs walked". == See also ==
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