caption: The image shows three pieces of rock on a black surface with the words "Reophax Catenulatus USNM PP 8262 Holotype" written at the top and bottom. The rock appears to be a type of rock, with a light brown color and a rough texture. It is arranged in a triangular formation, with the largest rock in the center and two smaller rocks on either side. The background is a deep black color, providing a stark contrast to the light brown of the rock.