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Acrocanthosaurus (meaning 'high-spined lizard') is a genus of theropod dinosaur that existed in what is now North America during the Aptian and early Albian stages of the Early Cretaceous. Like most dinosaur genera, Acrocanthosaurus contains only a single species, A. atokensis. Its fossil remains are found mainly in the U.S. states of Oklahoma and Texas, although teeth attributed to Acrocanthosaurus have been found as far east as Maryland. Acrocanthosaurus was a bipedal predator. As the name suggests, it is best known for the high neural spines on many of its vertebrae, which most likely supported a ridge of muscle over the animal's neck, back and hips. Acrocanthosaurus was one of the largest theropods, approaching 12 meters (40 ft) in length, and weighing up to about 2.40 metric tons (2.65 short tons). Large theropod footprints discovered in Texas may have been made by Acrocanthosaurus, although there is no direct association with skeletal remains. Recent discoveries have elucidated many details of its anatomy, allowing for specialized studies focusing on its brain structure and forelimb function. However, there is still debate over its evolutionary relationships, with some scientists classifying it as an allosaurid, and others as a carcharodontosaurid. Acrocanthosaurus was the largest theropod in its ecosystem and likely an apex predator which possibly preyed on large sauropods and ornithopods. (Read more...)

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Paul Sereno2

Paul Sereno is an American paleontologist who is the discoverer of several new dinosaur species on several continents. He has conducted excavations at sites as varied as Inner Mongolia, Argentina, Morocco and Niger. He is a professor at the University of Chicago and a National Geographic "explorer-in-residence." Sereno's most widely publicized discovery is that of a nearly complete specimen of Sarcosuchus imperator (popularly known as SuperCroc) at Gadoufaoua in the Tenere desert of Niger. Other major discoveries include Eoraptor - the oldest known dinosaur fossil, Jobaria, the first good skull of Carcharodontosaurus iguidensis, Afrovenator, Suchomimus and the African pterosaur. (Read more...)

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After his dismissal from KSAC (Kansas State University) in 1874, Benjamin Franklin Mudge wrote to Othniel Charles Marsh:

"When you were here, you stated that you should like to employ one or more young men to collect fossils in western Kansas. As perhaps you may have learned, I have been summarily discharged (with two other professors) from this college. This has been done by an incompetent, conceited clergyman, who is acting as president."
Benjamin Franklin Mudge, February 3, 1874 letter in the Yale Archives

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Malerisaurus is an extinct genus of prolacertiform from the Late Triassic of India belonging to the family Protorosauridae.

Two incomplete Malerisaurus skeletons were discovered in what is thought to be the gastric contents of a Parasuchus hislopi. The fossils were retrieved from fluvial flood plain deposits of the Late Triassic Maleri Formation of the Gondwana supergroup, India. Malerisaurus was a small eosuchian, presumably bipedal, and probably capable of climbing trees and swimming. The skull has some adaptations to a carnivorous diet, but is nevertheless unspecialized and probably more of an insectivore. Malerisaurus, seen as a diapsid skull, shows primitive and advanced facies in its unossified laterosphenoid, absence of antorbital and mandibular fenestrae, gracile form, primitive girdles, elongated cervicals and absence of dermal armour. The suborder Prolacertiformes currently represents four families: Petrolacosauridae, Protorosauridae, Prolacertidae and Tanystropheidae. Provisionally, Malerisaurus is regarded as being phylogenetically close to Protorosaurus.

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