Whats The Difference: Hyla triangulum - Dendropsophus leucophyllatus - Dendropsophus ebraccatus?

[nmrobi]

Hey, I was at Petco getting a new cartridge for the filter in my Litoria caerulea terrarium and noticed that they had, what they called, Clown Tree Frogs for sale. It didn't look to me like that's what they were. But after looking at the pictures on the internet that I could find from searching Hyla triangulum, I can see that this is what they might be, But I'm still not sure. They had one large stripe down the middle of the body, and were a yellow/orange/brown color. Sorry my description is really vague. My questions are; Does anyone know what tree frogs Petco actually has. And whats the difference between these frogs: Hyla triangulum - Dendropsophus leucophyllatus - Dendropsophus ebraccatus?