American paleontologistJoseph Leidy describes the new genus and speciesLaelaps aquilunguis, demonstrating thattheropoddinosaurs walked on their hind limbs rather than on all fours as in earlier reconstructions.[12]
^Down, J. Langdon H. (1866). "Observations on the Ethnic Classification of Idiots".Clinical Lectures and Reports by the Medical and Surgical Staff of the London Hospital.3:259–62.
^Holtz, Thomas R. (2004). "Tyrannosauroidea". In Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (eds.).The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 111–136.ISBN0-520-24209-2.
^Penguin Pocket On This Day. Penguin Reference Library. 2006.ISBN0-14-102715-0.
^McNeill, Ian (1972).Hydraulic Power. London: Longman.ISBN0-582-12797-1.