. Brimleyana. Zoology; Ecology; Natural history. 58 Christopher W. Brown and Carl H. Ernst 7". Fig. 1. Range of Crotalus horridus (from Klauber 1972). County and southward as intergrades, because the specimens of atri- caudatus from counties bordering the Mississippi River more closely resembled horridus in some characters. A study by Pisani et al. (1973) concluded that, on the basis of 13 morphological characters, the recognition of subspecies in C. horridus could not be justified. They examined specimens from localities through- out the range, including western populations where intergr
. Brimleyana. Zoology; Ecology; Natural history. 58 Christopher W. Brown and Carl H. Ernst 7". Fig. 1. Range of Crotalus horridus (from Klauber 1972). County and southward as intergrades, because the specimens of atri- caudatus from counties bordering the Mississippi River more closely resembled horridus in some characters. A study by Pisani et al. (1973) concluded that, on the basis of 13 morphological characters, the recognition of subspecies in C. horridus could not be justified. They examined specimens from localities through- out the range, including western populations where intergradation is thought to occur. The purpose of this study was to examine variation in pattern and adult size differences in addition to those morphological characters used by Pisani et al. (1973) in eastern C. horridus to determine if a more comprehensive study of the species is needed. MATERIALS AND METHODS Data were obtained on 337 museum specimens from New Hamp- shire, Vermont, Massachusetts, Connecticut, New York, New Jersey, Pennsylvania, Maryland, Virginia, North Carolina, South Carolina, Georgia, and Florida. However, only 101 specimens were suitable for the analyses used here in that they were complete in all characters exam- ined. Twenty-one specimens were from localities of probable intergrada- tion, and so were treated separately. Of the remaining 80, 10 were juve- niles and were eliminated from some analyses. Localities of the 101 specimens used are shown in Figure 2. The characters used in this study. 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 North Carolina State Museum of Natural History. [Raleigh, NC : North Carolina State Museum of Natural History]
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Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectzoology
