The manual unguals of Struthiomimus altus compared with those of other theropods. The ungual of digit I is sub-raptorial and comparable with that of Compsognathus. The unguals of digits II and III are decidedly non-raptorial. The horizontal scale represents 20 mm. A, S. altus, UCMZ(VP)1980.1, digits I, II, and III; B, Gallimimus bullatus, cast at ROM; C, Ornithomimus edmontonicus, ROM 851; D, C. longipes, adapted from Ostrom (1978); E, Deinonychus antirrhopus, adapted from Ostrom (1969); F, Allosaurus fragilis, ROM 5091; G, Ornitholestes hermanni, adapted from Ostrom (1969). From Nicholls & Russell, 1985

The manual unguals of Struthiomimus altus compared with those of other theropods. The ungual of digit I is sub-raptorial and comparable with that of Compsognathus. The unguals of digits II and III are decidedly non-raptorial. The horizontal scale represents 20 mm. A, S. altus, UCMZ(VP)1980.1, digits I, II, and III; B, Gallimimus bullatus, cast at ROM; C, Ornithomimus edmontonicus, ROM 851; D, C. longipes, adapted from Ostrom (1978); E, Deinonychus antirrhopus, adapted from Ostrom (1969); F, Allosaurus fragilis, ROM 5091; G, Ornitholestes hermanni, adapted from Ostrom (1969).

From Nicholls & Russell, 1985

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