crocodilian Goniopholis, and the turtles Glyptops and Naomichelys. Possible indeterminate bird remains are also known from this formation. The fossil evidence suggests that the gar Lepisosteus was the most common vertebrate in this region. The early mammals known from this region include Atokatherium boreni and Paracimexomys crossi. Cultural references In 1998, Astrodon johnstoni was named the state dinosaur of Maryland. Astrodon also appears in the novel Raptor Red by Robert T. Bakker, as prey of Utahraptor. A life-sized Astrodon model (featuring a wound on its left rear leg) is displayed in the Terror of the South exhibit on the third floor of the North Carolina Museum of Natural Sciences. Another Astrodon model is also on display at the Maryland Science Center in Baltimore, MD. Astrodon was the state dinosaur of Texas, but has since been replaced with Sauroposidon. References Further reading Johnston, C., 1859, "Note on odontography," Amer. Journal Dental Sci. 9:337–343. Kranz, P. M. 1996, "Notes on the Sedimentary Iron Ores of Maryland and their Dinosaurian Fauna", in Maryland Geological Survey Special Publication No. 3, pp. 87–115. Leidy, J 1865, Memoir on the extinct reptiles of the Cretaceous formations of the United States. Smithson. Contrib. Knowl. XIV: atr. VI: 1–135. Lucas, F. A. 1904, "Paleontological notes," Science (n.s.) XIX (480): 436–437. Lull, R. S. 1911, "The Reptillian Fauna of the Arundel Formation" and "Systematic Paleontology of the Lower Cretaceous Deposits of Maryland – Dinosauria", Lower Cretaceous: Maryland Geological Survey Systematic Reports, pp. 173–178, 183–211. Marsh, O. C. 1888, "Notice of a New Genus of Sauropoda and Other New Dinosaurs from the Potomac Group," American Journal of Science, 3rd Series, Vol. XXXV, pp. 89–94. External links Maryland State Archives Early Cretaceous dinosaurs of North America Macronarians Symbols of Maryland Fossil taxa described in 1859 Paleontology in Maryland