Cast of dinosaur track, Grallator species
The track measures 7” and was made by a small theropod (bipedal, meat-eating dinosaur, Turners Falls, Mass., Newark Group, Early Jurassic).
Right rear footprint of small theropod (bipedal, meat-eating dinosaur)
Alt listed as:
Ichnospecies Anchisauripus sillimani
Early Jurassic Connecticut Valley, MA.
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Ichnospecies:In paleontology, an ichnospecies refers to a specific type of trace fossil, like a footprint, rather than the animal that made it.
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Anchisauripus:This is the ichnogenus, or group of similar footprints, to which Anchisauripus sillimani belongs.
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Theropod Dinosaurs:Anchisauripus footprints are commonly found in rocks from the Early Jurassic period and are believed to have been made by theropod dinosaurs, the group that includes carnivorous dinosaurs like Tyrannosaurus Rex.
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Type Material:The original specimens used to define Anchisauripus sillimani were described in detail in a 1998 paper, including figures and descriptions of the type specimens and other related tracks found in the Hartford and Deerfield basins of Connecticut and Massachusetts.
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Significance:Studying ichnospecies like Anchisauripus sillimani helps paleontologists understand the diversity of dinosaurs in the past, even when skeletal remains are scarce
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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.