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Trackmaker of the Parabrontopodus footprint
Diet : Herbivorous
Habitat : North American plains
Length : 82-87 feet (25-27 meters)
Weight : About 22,000-26,500 lb (10-12 tonnes)
Parabrontopodus ichnogenus refers to narrow sauropod trackways with manual prints four or five times smaller than the pedal prints. In the West U.S.A., Parabrontopodus tracks are found in the Middle and Upper Jurassic rocks of Entrada Sandstone and Morrison Formation. This kind of tracks was left by gravisaurian and diplodocid sauropods.
Diplodocus from Late Jurassic of the U.S.A. belongs to the sauropods, a group comprising the largest dinosaurs. Discovered in the 19th century, it was long considered to be the biggest terrestrial animal ever. However, recently discovered South American sauropods have turned out to be even twice as long as Diplodocus. Its whip-shaped tail is constructed of vertebrae with double processes of haemal arches below the vertebral body (hence the name Diplodocus). Sauropods had their nostrils in the back of the head above the eyes. It was formerly thought that due to their size, sauropods had to live in water. Nowadays we know that they were social, terrestrial herbivores.