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The armor and spikes of Desmatosuchus were its only ways to defend itself from predators. The lateral spike rows showed variation in size among individuals, especially the second most anterior spike. This spike was always shorter than the one in front of it, but to what extent varied drastically.
Charles W. Gilmore named Pinacosuchus in 1942 for USNM 16592, consisting of a fragment of upper jaw, seven partial vertebrae, a partial coracoid, a partial thigh bone, numerous pieces of bony armor, and other fragments. This specimen was discovered at the "Lizard Locality" in the Manti National Forest, Emery County, Utah.
Armour, although all used for the sole intent to ward off attackers, can be split into defensive and offensive armour. Examples of offensive armour are horns, hooves, antlers, claws, beaks, clubs and pincers, as developed in some mammals, birds, reptiles (including dinosaurs, such as the dromaeosaurid claw and the ceratopsian horn) and arthropods.
Armor of Achilles, created by Hephaestus and said to be impenetrable. (Greek mythology) Armor of Beowulf, a mail shirt made by Wayland the Smith. (Anglo-Saxon mythology) Armor of Örvar-Oddr, an impenetrable "silken mailcoat". (Norse mythology) Babr-e Bayan, a suit of armor that Rostam wore in wars described in the Persian epic Shahnameh. The ...
Since pieces of the bony armor that once embedded in the skin of the fish Astraspis were preserved at St. Joseph's, the similarly aged nearby Middle Ordovician rocks of the Upper Peninsula are also likely to preserve similar fish fossils. If this supposition is correct, then Michigan's fish fossil record may go back as far 460 million years ago.
The frontal bone of Acaenasuchus is relatively narrower in the anterior direction. There is ornamentation on the dorsal surface of the frontal bone in the form of sharp circular ridges and oblong pits. [9] There is a large boss that forms the dorsal surface of the orbit, perhaps representing a palpebral co-ossification to the frontal. [9]
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In 1923, paleontologist Charles Lewis Camp discovered a bone in the Chinle Formation in what is now Petrified Forest National Park. It was found on top of a Placerias jaw in an area called Crocodile Hill, part of the late Carnian-age Blue Mesa Member of the formation. The bone included the skull and lower jaws of a reptile, but when Camp ...