| Sarmientichnus Temporal range: | |
|---|---|
 | |
| Sarmientichnus footprints from Argentina | |
Trace fossil classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Ichnogenus: | † Sarmientichnus Casamiquela, 1964 |
Sarmientichnus is an ichnogenus of dinosaur footprint.
These footprints have been found in Callovian/Oxfordian eolian sandstones of Argentina (age range: from 164.7 to 155.7 million years ago). [1] They have been identified as belonging to small ground dwelling carnivore dinosaurs, probably Coelurosaurs. The size of the largest footprint was 4.4 cm (0.14 ft) and was made by an individual that was 65 cm (2.1 ft) in length and 495 grams (1.1 lbs) in weight. [2]
Giganotosaurus is a genus of theropod dinosaur that lived in what is now Argentina, during the early Cenomanian age of the Late Cretaceous period, approximately 99.6 to 95 million years ago. The holotype specimen was discovered in the Candeleros Formation of Patagonia in 1993 and is almost 70% complete. The animal was named Giganotosaurus carolinii in 1995; the genus name translates to "giant southern lizard", and the specific name honors the discoverer, Ruben Carolini. A dentary bone, a tooth, and some tracks, discovered before the holotype, were later assigned to this animal. The genus attracted much interest and became part of a scientific debate about the maximum sizes of theropod dinosaurs.
Deinocheirus is a genus of large ornithomimosaur that lived during the Late Cretaceous around 70 million years ago. In 1965, a pair of large arms, shoulder girdles, and a few other bones of a new dinosaur were first discovered in the Nemegt Formation of Mongolia. In 1970, this specimen became the holotype of the only species within the genus, Deinocheirus mirificus; the genus name is Greek for "horrible hand". No further remains were discovered for almost fifty years, and its nature remained a mystery. Two more complete specimens were described in 2014, which shed light on many aspects of the animal. Parts of these new specimens had been looted from Mongolia some years before, but were repatriated in 2014.
Therizinosauridae is an extinct family of derived (advanced) therizinosauroid dinosaurs whose fossil remains have been found in mostly Late Cretaceous boundary. Even though representative fossils have only been found throughout Asia and North America, the range of Therizinosauridae is believed to have spanned much of the supercontinent of Laurasia based on several footprints and isolated remains in Europe and Africa. Currently, Therizinosauridae comprises eight described and named taxa.
Size is an important aspect of dinosaur paleontology, of interest to both the general public and professional scientists. Dinosaurs show some of the most extreme variations in size of any land animal group, ranging from tiny hummingbirds, which can weigh as little as two grams, to the extinct titanosaurs, which could weigh as much as 50–100 t.
Lurdusaurus is a genus of massive and unusually shaped iguanodont dinosaur from the Elrhaz Formation in Niger. It contains one species, L. arenatus. The formation dates to the Early Cretaceous, roughly 112 million years ago. Lurdusaurus has a highly atypical body plan for an iguanodont, with a small skull, long neck, rotund torso, and powerful forelimbs and claws, somewhat reminiscent of a ground sloth. Its metacarpals are fused and reinforced into a large block, and the thumb spike is remarkably enormous. These would have allowed the hand to have functioned almost like a ball-and-chain flail. Lurdusaurus is estimated to have been 7–9 m (23–30 ft) long and 2 m high when on all-fours, but its stomach would have been only 70 cm off the ground. It may have weighed 2.5–5.5 t, conspicuously heavy for an iguanodontid this size.
Grallator ["GRA-luh-tor"] 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, 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.
Pycnonemosaurus is a genus of carnivorous theropod dinosaur that belonged to the family Abelisauridae. It was found in the Upper Cretaceous red conglomerate sandstones of the Cachoeira do Bom Jardim Formation, Mato Grosso, Brazil, and it lived during the Campanian stage of the Late Cretaceous period.
Eubrontes is the name of fossilised dinosaur footprints dating from the Late Triassic and Early Jurassic. They have been identified from France, Poland, Slovakia, Czech Republic, Italy, Spain, Sweden, Australia (Queensland), US, India, China and Brazil (South).
The Chacarilla Formation is an Oxfordian to Early Cretaceous geologic formation of the Tarapacá Basin in northern Chile, close to the border with Bolivia. The marine and fluvial formation preserves several dinosaur trackways and has been declared a Natural Sanctuary in 2004.
Argoides is an ichnogenus of dinosaur footprint, originally named as an ichnospecies of Ornithichnites, left by what was possibly an ornithopod, although due to the age of the tracks, they were probably instead made by theropods. A 2.8 cm long footprint from the lower Jurassic represents the holotype. The size of the track maker is estimated at 56 cm (1.84 ft) long and 185 grams (0.408 lbs) in weight. It has been found in the Portland, Passaic and Turners Falls Formations of Massachusetts, Connecticut and New Jersey.
Brontopodus is an ichnogenus of dinosaur footprint. The footprint has diplodocid form, but four toes when almost every diplodocid has no more than three. This leaves Dyslocosaurus as the only known genus capable of producing the footprints. In 2020 Molina-Perez and Larramendi estimated the size of an individual at 23.7 meters (78 ft) and 32 tonnes based on the 1.1 m (3.6 ft) long footprint that was found in Texas.
Carmelopodus is an ichnogenus of theropod dinosaur footprint. They are suggested to belong to basal ceratosaurs, due to their similarities with abelisaurid footprints. In 2016, a large footprint from the Early Jurassic of Morocco belonging to Carmelopodus sp. was estimated to belong to an 8 m (26 ft) long and 1.65 t heavy individual. Another footprint from the Middle Jurassic of the USA that belongs to Carmelopodus untermannorum, the type species, has a size of 4 cm (0.13 ft) and was made by an individual that was 68 cm (2.2 ft) in length and 1 kg (2.2 lbs).
Macropodosaurus is an ichnogenus of therizinosaurid footprints from the Late Cretaceous of Asia, North America and Poland. The ichnogenus is currently monotypic only including the type ichnospecies M. gravis, described and named in 1964.
Parabrontopodus is an ichnogenus of dinosaur footprint, that was initially described by Lockley et al. in 1994, and was assigned to Sauropoda by Lockley in 2002 and in 2004 by Niedzwiedzki and Pienkowski. Various species through their footprints that are characterized by the association of two impressions left by hand and foot. The acquisition of a specific family is complex, but now in most cases, they have been considered diplodocoids and similar animals. The reason is that their traces left are large, but in proportion to the size, from animals, seem very light because the depth of imprint is low.
Pseudotetrasauropus is an ichnogenus of sauropod dinosaur footprint from the Elliot Formation of Lesotho and South Africa. In 2020 based on the 60 cm long footprint Molina-Pérez and Larramendi estimated the size of the animal at 9.1 meters and 2 tonnes.
Sauropodichnus is an ichnogenus of dinosaur footprint. In 2020 Molina-Perez and Larramendi based on the 90 cm long footprint estimated the size of the animal at 26 meters and 40 tonnes.
Tyrannosauripus is an ichnogenus of dinosaur footprint. It was discovered by geologist Charles "Chuck" Pillmore in 1983 and formally described by Martin Lockley and Adrian Hunt in 1994. This fossil footprint from northern New Mexico is 96 cm long and given its Late Cretaceous age, it very likely belonged to the giant theropod dinosaur Tyrannosaurus rex. In 2016 the size of this individual was estimated at 11.4 meters and 5.8-6.9 tonnes. Similar tridactyl dinosaur tracks in North America were discovered earlier and named Tyrannosauropus in 1971, but they were later recognized as hadrosaurid tracks and their description deemed inadequate, with Tyrannosauropus regarded as a nomen dubium. True footprints likely from Tyrannosaurus would not be found until the discovery of Tyrannosauripus. In 2007, a large tyrannosaurid track was found also in eastern Montana. In 2016, a probable fossil trackway of Tyrannosaurus was discovered in Wyoming.
Velociraptorichnus is an ichnogenus of dinosaur footprint. In 2016 based on the 10 cm (0.33 ft) long footprint the animal's size was estimated at 1.2-1.55 meters (3.9–5 ft) and 3.9-5.6 kg (8.6-12.3 lbs).
Abelichnus is an extinct ichnogenus of dinosaur footprint from the Candeleros Formation and the Rio Limay Formation. The type ichnospecies, Abelichnus astigerrae, was first discovered in Argentina in 1987 and was recorded as the biggest known dinosaur footprint ever discovered. Abelichnus probably grew to a size of 12.5-13 meters long.
Pedreira do Avelino is a natural monument in Zambujal, Sesimbra, Portugal. The site contains an important set of dinosaur footprints from the Upper Jurassic. The main slab is about 15 metres (49 ft) long by 10 metres (33 ft) wide, and is inclined (30°), which facilitates its observation and pedagogical use. It contains 5 tracks and 108 total footprints.
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