. Bulletin. Natural history; Natuurlijke historie. 0 12 3 4 5. FIG. 30. Seventh (?) cervical vertebra of Deinonychus antirrhopus, YPM 5210, in posterior (A), left lateral (B), anterior (C) and dorsal (D) views. Abbreviations: dp—diapophysis; ep—epipo- physis; li—scars of interspinous ligament; ns—neural spine; po—postzygapophysis; pp—para- pophysis; pr—prezygapophysis. the cervicals (Osborn, 1906, fig. 3). This trait may also exist in Coelurus (YPM 1991), but apparently is absent in Ornitholestes (AMNH 619) and Ornithomimus (AMNH 5339). The functional significance of this angled design of Dein
. Bulletin. Natural history; Natuurlijke historie. 0 12 3 4 5. FIG. 30. Seventh (?) cervical vertebra of Deinonychus antirrhopus, YPM 5210, in posterior (A), left lateral (B), anterior (C) and dorsal (D) views. Abbreviations: dp—diapophysis; ep—epipo- physis; li—scars of interspinous ligament; ns—neural spine; po—postzygapophysis; pp—para- pophysis; pr—prezygapophysis. the cervicals (Osborn, 1906, fig. 3). This trait may also exist in Coelurus (YPM 1991), but apparently is absent in Ornitholestes (AMNH 619) and Ornithomimus (AMNH 5339). The functional significance of this angled design of Deinonychus cervicals is not entirely clear, but it quite obviously must have been related to natural curvature of the neck (Fig. 31). Many modern vertebrates are characterized by an arched neck, but few possess more than one or two distorted or angled cervicals. In artiodactyls, usually only the seventh (rarely the sixth and seventh) cervical is so distorted. On the other hand, some degree of angling is present in all cervicals of equids, although pronounced opisthocoely obscures this condi- tion. Some degree of angling is present throughout the cervical series of fissipeds and is particularly well developed in felids, reaching a maximum in the lion. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peabody Museum of Natural History. New Haven : The Museum
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