Paper Pondshell (Paper Floater)
Very thin, elongate shell; oblong and inflated in adults. Umbo not raised above the very flat hinge line. Epidermis is shiny, yellow to green with faint yellow to green rays; young are beautiful bright green, with thin glossy shells. Inside shell beak cavity shallow to absent; teeth absent; nacre (lining) iridescent white to bluish-white.
Similar species: Small giant floaters are distinguished by umbo distinctly raised above the hinge line.