Well, what do you know......

[rodsboys]

At first glance your frog looks like a male to me. Not all males will have black arms especially when females are not present. I have males and females and neither of my males have black arms. I assume they are not interested in the ladies and I am OK with it. A close up of the first pic would make it easier to tell.

[kmichael55]

I'm betting you have a female... my male is SO very talkative. Last night it was almost constant croaking. Here's a good picture I found online of female parts:

Here's a picture of my male with black arms:


and one of his backside:

[kmichael55]

P.S. the "stitches" are their sensory organs/lateral line. Since they have no eardrums, tongue or moveable eyelids (and their eyes are on top of their heads) they use their franken-stitches to sense changes in the water around them.

Pretty cool! You can see them really well on my guy since he's albino.
Oh! and here's another picture of his absolutely male cloaca: (Kind of slightly protrude-y but not as much as the female in the first pic)