. Bulletin. Natural history; Natural history. November, 1961 Smith : Amphibians and Reptiles of Illinois 125 ry: Mount Carmel (Hay 1887^); White County: Phillipstown (H. Garman 1892) ; Whiteside County: Prophetstown (H. Garman 1892) ; Williamson County: Marion (Cagle \942b). Kinosternon Spix Five species of this New World genus, most of them polytypic, occur in the United States and Canada, two in Illinois. Kinosternon flavescens spooneri Smith Illinois Mud Turtle Kinosternon fla'vcscens spooneri P. W. Smith 1951:195 (type locality: Henderson County State Forest, 7 mi. N Oquawka, Illinois). Ki
. Bulletin. Natural history; Natural history. November, 1961 Smith : Amphibians and Reptiles of Illinois 125 ry: Mount Carmel (Hay 1887^); White County: Phillipstown (H. Garman 1892) ; Whiteside County: Prophetstown (H. Garman 1892) ; Williamson County: Marion (Cagle \942b). Kinosternon Spix Five species of this New World genus, most of them polytypic, occur in the United States and Canada, two in Illinois. Kinosternon flavescens spooneri Smith Illinois Mud Turtle Kinosternon fla'vcscens spooneri P. W. Smith 1951:195 (type locality: Henderson County State Forest, 7 mi. N Oquawka, Illinois). Kinosternon flavescens, Cahn 1931:120-3. Kinosternon fiavescens fiavescens nee Agassiz, Pope 1939:52-5. Diagnosis.—A medium-sized aquatic tur- tle (largest Illinois specimen with a cara- pace length of mm.), fig. 113, with an obtusely oval, much-depressed shell; plas- tron large and consisting of 11 plates; pec- toral scutes triangular in shape and nar- rowly in contact; length of interpectoral suture less than one-fourth length of inter- humeral suture; ninth marginal more than twice height of eighth marginal; anterior and posterior parts of plastron approxi- mately equal in length; head of medium size; nose not noticeably projecting beyond mouth; paired barbels on chin and neck conspicu- ous; head a uniform dark above, lighter be- neath, with some yellow in patches; cara- pace black, brownish black, or dark olive, patternless or with black margins along the sutures. Variation.—Sexual variation in the Illi- nois mud turtle is similar to that found in the musk turtle. Males possess larger tails, more prominent horny tips on the tail, and two patches of horny skin on the inside of %m^i;:&ta/uk,!¥m3^. Fig. 113.—Adult Kinosternon flavescens spooneri from Mason County, Illinois. Youiig^ specimens are nearly black; older individuals, dark olive or brownish Please note that these images are extracted from scanned page images that may have been digitally enhance
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