I collected this aquatic invertebrate in the summer but waited to post as both me and my professor were stumped by it. Got it from Atlanta, Georgia

This was for a class project that I just finished and my teacher just told me to put down toad bug of the genus gelastocoris but some features don’t match up so i was wondering if any of you had ideas I can get better pics but if need microscope pictures I have not figured out how to take pictures through the microscope yet so any advice would help.