''Sarmientichnus'' is an
ichnogenus
An ichnotaxon (plural ichnotaxa) is "a taxon based on the fossilized work of an organism", i.e. the non-human equivalent of an artifact. ''Ichnotaxon'' comes from the Ancient Greek (''íchnos'') meaning "track" and English , itself derived from ...
of
dinosaur
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic Geological period, period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the #Evolutio ...
footprint.
Fossil record
These footprints have been found in
Callovian
In the geologic timescale, the Callovian is an age and stage in the Middle Jurassic, lasting between 165.3 ± 1.1 Ma (million years ago) and 161.5 ± 1.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the ...
/
Oxfordian eolian sandstones of Argentina (age range: from 164.7 to 155.7 million years ago). They have been identified as belonging to small ground dwelling carnivore dinosaurs, probably
Coelurosaur
Coelurosauria (; from Greek, meaning "hollow-tailed lizards") is the clade containing all theropod dinosaurs more closely related to birds than to carnosaurs.
Coelurosauria is a subgroup of theropod dinosaurs that includes compsognathids, ty ...
s. 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.
See also
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List of dinosaur ichnogenera
This list of dinosaur ichnogenera is a comprehensive listing of all ichnogenera that have been attributed to dinosaurs, excluding class Aves (birds, both living and those known only from fossils) and purely vernacular terms. The list includes al ...
References
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Theropod trace fossils
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