caption: The image shows a collage of three stones, with the text "discorbis charlottensis usnm cc 2674 holotype" at the top and bottom. The stones appear to be arranged in a symmetrical pattern, with each stone having a unique shape and texture. The colors of the stones range from light to dark, with some having a glossy finish and others having a matte finish. The text is written in a bold, black font, making it stand out against the light background.