Mantles_and_external_openings_of_fultoportulae_4000X_copy.jpg

MDC 492301

Giant Springs, Cascade County, MT

Mantles at junction between two sibling valves, intaglio valve at left and cameo valve at right

47.5350, -111.2278

Note stepped mantle of cameo valve (right), external openings of fultoportulae, and crenulate junctions between mantles and valvocopulae.