. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Figure 46. Examples of possible resolutions of "missing" geographic components in the area cladogram of Sibynomor- phus (Fig. 45). These area cladograms assume a complex re- lationship between geographic components of Sibynomorphus and species of Dipsas, which currently is speculative (see text). (A) Resolution corresponding to the area cladogram of Ceratophrys (Fig. 45B). (B) Resolution corresponding to the area cladogram of Microlophus (Fig. 45D); a possible alter- native is indicated by the addit
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Figure 46. Examples of possible resolutions of "missing" geographic components in the area cladogram of Sibynomor- phus (Fig. 45). These area cladograms assume a complex re- lationship between geographic components of Sibynomorphus and species of Dipsas, which currently is speculative (see text). (A) Resolution corresponding to the area cladogram of Ceratophrys (Fig. 45B). (B) Resolution corresponding to the area cladogram of Microlophus (Fig. 45D); a possible alter- native is indicated by the additional geographic component "Atlantic Forest," which is a component of "Austral South America" used in Figures 45 and 46. (C) A more complex scenario in which the northern and southern species of Siby- nomorphus are each related to different species of Dipsas in Amazonia, which implies polyphyly of Sibynomorphus as cur- rently understood. Many more resolutions of these area clad- ograms are possible, but all depend on the precise relationship among the northern and southern species of Sibynomorphus and other species of South American Dipsadini. These rela- tionships are largely unexplored. Research Needs on the Northern Species of Sibynomorphus More Field Work and Collections are Needed. Several topics addressed in this study need additional research based on. 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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