. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. C ^^''^^a^ssasg^Sjtiwgga^^.^ijg^^l^^ <:::^r^.^^,r^. Figure 10. A A representative of the genus Polypterus. B. Scaphirhynchus. a sturgeon from the Mississippi drainage. C. Polyodon spathula. also from the Mississippi. (From "The Vertebrate Body, " 5th Ed. by A. S. Romer and T. S. Parsons. Copyright 1977 by W. B. Saunders Co. Reprinted by permission of Holt, Rinehart, and Winston.) pterygii (, McAllister, 1968; G. Nel- son, 1969a). More recently, however, Gardiner (1973), Schaeffer (1973), Wilev (19
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. C ^^''^^a^ssasg^Sjtiwgga^^.^ijg^^l^^ <:::^r^.^^,r^. Figure 10. A A representative of the genus Polypterus. B. Scaphirhynchus. a sturgeon from the Mississippi drainage. C. Polyodon spathula. also from the Mississippi. (From "The Vertebrate Body, " 5th Ed. by A. S. Romer and T. S. Parsons. Copyright 1977 by W. B. Saunders Co. Reprinted by permission of Holt, Rinehart, and Winston.) pterygii (, McAllister, 1968; G. Nel- son, 1969a). More recently, however, Gardiner (1973), Schaeffer (1973), Wilev (1979a), and especially Patterson (1982) have provided convincing evidence, snmniarized in Figure 6, that the polyp- terids represent highly specialized sur- vivors of primitive actinoptervgian fishes. Romer (1966), Gardiner (1967), and An- drews et al. (1967) have also held this view. Nieuwenhuys (1967, 1982) has al- lied Polypterus with the Actinopterygii on neuroanatomical evidence, as has Lovtrup (1977) on otolith structure and lens proteins. The Cladistia are hypothesized to be monophyletic based on the dorsal fin- spine pattern (Fig. lOA), the presence of a series of spiracular ossicles, and the structure of the urohyal and parasphe- noid, among many other uniquely de- rived features (Daget, 1950; see Patter-. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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