Appearance
The East African black mud turtle has a smooth, domed carapace with a length of 5.1-7.9 inches. The carapace is typically dark brown, gray, or black, often with yellow markings on the margins. The plastron is hinged, and can be brown, grey, black, or yellow. The upper jaw has a blunt unnotched, nonbucuspid tomium. The head of an adult is generally uniform in color, never vermiculated. Like all side-necked turtles, the neck retracts sideways.Naming
*''P. s. subniger'' Bonnaterre, 1789 - type species⤷ ''P. s. parietalis'' Bour, 1983 - Seychelles black mud turtle
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