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CYTOLOGIA
Vol. 48 (1983) No. 1 P 177-183

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http://doi.org/10.1508/cytologia.48.177


Standard karyotypes of carettochelyid and trionychid turtles are similar. The pitted-shelled turtle, Carettochelys insculpta (2n=68), and three species of softshelled turtles, Trionyx spiniferus, T. ferox and T. sinensis (2n=66) were examined. Chromosomal banding patterns are the same among the species of Trionyx studied, but substantially different from non-trionychoid turtles. Karyotypic similarity supports previous morphological studies that indicate the families Carettochelyidae and Trionychidae are closely related or that both families are distantly related to other turtles.

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