A rigid endoscope was used to examine the cloacae of an adult pair of Tiliqua gigas gigas, and single specimens of Tiliqua gigas evanescens and Tiliqua sp. (Irian Jaya form). Throughout the procedure the animals showed no signs of stress. Clear anatomical differences were observed between the sexes. Females presented the typical two pairs of papillae (ureteral
and genital) and males a single pair of urogenital papillae. The observed differences were confirmed when both pairs bred successfully in the following year.
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