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SummaryThe serrated hinged terrapin, Pelusios sinuatus (Family Pelomedusidae), is the largest species in its genus (carapace length up to 55 cm), with females larger than males. This is the typical deep water terrapin commonly found in the rivers and lakes of eastern Africa—large numbers can often be seen basking on suitable logs, rocks, mudbanks, or on the backs of sleeping hippopotami. During the rainy season these terrapins migrate overland and colonize isolated pans and waterholes. Nesting takes place at the beginning of the rainy season, October–November in southern Africa, but has also been recorded as late as April, with nests being excavated up to 500 m from the water. The clutch size varies from 7 to 30 eggs. The species exudes a foul odor when handled and is not currently exploitated and is not considered threatened, except for populations in polluted rivers downstream from industrialized areas.