Below is a list of the box turtles I am aware of. The last three on the list are all from Mexico, I believe, and I’m unsure if The Mexican Box turtle’s range overlaps into America at all. Just thought you might be interested. ALL of these have specific temperature, humidity, and diet requirements that differ from each other. I don’t recommend that you keep any of them together. It’s likely, depending on where you live, that some species can’t even be keep safely outside. Others may be impossible to acquire. I’m no expert so this is just an assumption on my part. I have successfully kept three-toeds and Easterns together for years but I know this is usually discouraged by experienced turtle keepers so I can’t advocate it. Maybe I’ve just been lucky.
Desert Box turtle- Terrapene ornata luteola
Eastern Box Turtle- Terrapene carolina carolina
Florida Box Turtle- Terrapene carolina bauri
Gulf Coast Box Turtle- Terrapene carolina major
Ornate (Western) Box Turtle- Terrapene ornata ornata
Three-Toed Box Turtle- Terrapene carolina trianguis
Yucatan Box Turtle- Terrapene carolina yucatana
Coahuila Box Turtle- Terrapene coahuila
Mexican Box Turtle- Terrapene carolina mexicana
Spotted Box turtle- Terrepene nelsoni