New Information on the Cranial Anatomy of Acrocanthosaurus
Acrocanthosaurus atokensis is the first-named and only species currently recognized as valid in the genus Acrocanthosaurus The genus name stems from the Latin for ‘‘high-spined lizard’’, as specimens referred to that taxon exhibit exceptionally tall neural spines along cervical and dorsal vertebrae [1,21,23] The species
Dinosaurs & Birds Acrocanthosaurus atokensis Fossil Replica
Acrocanthosaurus atokensis Fossil Replica The Acrocanthosaurus atokensis is a modular cast, that can be assembled by a crew of four people in less than two hours The replica is supported by a steel structure that is almost completely hidden within the bones themselves, and is hand painted to closely resemble the original specimen
Cranial Endocast of the Cretaceous Theropod Dinosaur
As was mentioned above, Acrocanthosaurus has been placed as the sister group to Carcharodontosaurus sa- haricus by Sereno et al (1996), forming the monophyletic clade Carcharodontosauridae, with Giganotosaurus Characters such as the division of the olfactory bulbs and tracts by a mesethmoid, which occurs in Acrocanthosaurus
Acrocanthosaurus atokensis Deinonychus Apatosaurus Stegosaurus
include Acrocanthosaurus atokensis and Deinonychus (southeast); and Jurassic (200–146 mya) sauropods Apatosaurus (weighing 250 tons and 75 feet long, also known as Brontosaurus), and Stegosaurus recovered from the Morrison Formation (northwest) The giant Saurophaganax maximus fossils are unique to Oklahoma
Interpretive Guide to Dinosaur Valley State Park
Acrocanthosaurus, a dinosaur similar in appearance to Tyrannosaurus rex Acrocanthosaurus ran on two legs as it pursued its prey Reaching up to 38 feet long, it left tracks ranging from 12 to 24 inches long and 9 to 17 inches wide sauropod tracks, probably Sauroposeidon proteles (aka Paluxysaurus jonesi) front foot hind foot carnosaur
Dinosaur remains are fairly rare in Arkansas; however there
Acrocanthosaurus atokensis A complete skeleton of was Acrocanthosaurus recovered near Idabel, Oklahoma approximately 25 miles from the Arkansas state line Recently discovered theropod footprint from southwestern Arkansas Sauropod trackway Thousands of sauropod tracks were exposed in mining operations of a gypsum mine in southwest Arkansas In
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Newspapers for this educational
program provided by:NEWSPAPERS IN EDUCATION This lesson is part of the Newspapers In Education program,Oklahoma Rocks.
To learn more visit nie.newsok.com.
A real life Jurassic Park existed in Oklahoma,
some 250-66 million years ago (mya), during the Mesozoic Era. This time is known as the "Age of the Dinosaurs." Creatures ranging from amphibians to dinosaurs roamedOklahoma, leaving fossils that tell us much of
their stories. Although there are fossils in the southeast, northwest Oklahoma has proved especially rich in dinosaur fossils. There is even a dinosaur trackway preserved in the MorrisonFormation near Kenton, in Cimarron County. Due
to erosion, much of the evidence for dinosaurs in other parts of the state is eroded away. Oklahoma fossils of meat-eating dinosaurs from the Cretaceous Era (146-66 mya)
includeAcrocanthosaurus atokensis
andDeinonychus
(southeast); and Jurassic (200-146 mya) sauropodsApatosaurus
(weighing 250 tons and 75 feet long, also known as Brontosaurus), andStegosaurus
recovered from the Morrison Formation (northwest). The giantSaurophaganax
maximus fossils are unique to Oklahoma. Fossils help: 1) Establish relative ages of marine and sedimentary rocks; 2) Reconstruct depositional environments and climates; 3) Correlate rock strata around the world; and4) Understand ancient plant and animal life and how climate change has
affected the past.Activities:
1. Using the geologic time scale http://ogs.ou.edu/level2-earthscied.php and internet,
think about what Oklahoma was like for dinosaurs. What was the climate like? How far was it to the sea? What other life would they have seen?2. Looking at the dinosaur footprint pictured with the 16-inch hammer, what might you
know about the dinosaur? How would you determine a dinosaur's weight, size, and how fast he/she was walking based on a trackway?3. What might you learn about its habitat and when it lived from studying the rocks
around the footprint? See: http://ogs.ou.edu/level2-earthscied.php and an Oklahoma trackway at: http://www.travelok.com/listings/view.profile/id.2245 Other tracks can be seen at the website for Dinosaur Ridge outside Denve r: http:// www.dinoridge.org/discoveries.html or at Clayton Lake State Park just west of the OK Panhandle: http://www.ucmp.berkeley.edu/mesozoic/cretaceous/clayton.html.For more information on Oklahoma's
Acrocanthosaurus atokensis
see:For an activity on dinosaur names go to:
http://www.ucmp.berkeley.edu/fosrec/MunGun4.htmlDinosaur track near Kenton, Oklahoma, shows three toes. The hammer to the left of the track is 16 inches long.
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