pictures didnt load on this computer properly (stupid internet...) but from what i can see, female. females have smaller and shorter tails than the males, and the cloaca is closer to the edge of the plastron in the females vs males.
This is going to be a good topic!! i also have to murrays i am not sure of the sex. Now looking at yours i have one looking exactly the same as yours and ive researched and always thought male, because i have another thats tail is half the size of that and really stump. i might actually put my turts on here too if thats ok? might help with the differenct size of tails
I don't know much about turtles but your looks like a female to me with it's short stout little tail, i have a definite male(i have seen him extend his private bits) and his tail would be twice as long as your turtles.
I have two short necks i will post pics up showin you there tails. see how we go
the first pic is what i think(thought) was a male and the second and third is the what i thought female with the short stumpy tail.
tell us what you think. there three years old now so still got lots more growing