Quote:
Originally Posted by MadDog
Out of these four species which one might be smaller
Three striped mud
White Cheek Mud Turtle
Giant Mexican Mud
African keeled mud turtle
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Your common names are a bit off, but that's ok
Striped mud turtles,
Kinosternon baurii, are about 4 inches long.
White-lipped mud turtles,
Kinosternon leucostomum, supposedy get around 7-9 inches. The subspecies
Kinosternon leucostomum leucostomum is known as the yellow-cheeked mud turtle.
By "giant Mexican mud" I'm assuming you either mean the Mexican giant musk turtle (not mud),
Staurotypus triporcatus, or the Mexican mud turtle,
Kinosternon integrum. Mexican giant musk turtles get up to about a foot long, while Mexican mud turtles are about the same size as white-lipped mud turtles.
African mud turtles are of the genus
Pelusios and are not related to the American mud turtles. They're also known as African hinged turtles or African side-necked turtles, and they grow larger than the American mud turtles.
I'd stick with one of the smaller species, like striped mud turtles. However, that doesn't mean I recommend he get a turtle. This is only IF he gets a turtle. If he's not prepared to spend money on adequate housing, filters, lighting, a timer, and equipment, and if he's not prepared to clean the habitat completely once a week, with additional water changes at least once or twice during the week, and if he's not ready to keep doing that for years to come, then he shouldn't get a turtle.