Could i keep a Map Turtle in a 38 gallon?

i have always wanted a turtle but the only one i knew was red eared sliders and they get too big, and now after some reading online i found out about map turtles. i read that they stay pretty small and want to know if i could get one or two in my 38 gallon. i have a fluval 305 in there right now and it filters up to 70 gallon tanks, also i have a 50 gallon filter i can install if necessary so any thoughts?