There are 5 pectinoida (scallops) that can be found in the Mazon Creek deposit. Aside from Aviculopecten mazonensis, all are uncommon to rare. Dunbarella striata is commonly found in Pennsylvanian aged black shales but fairly rare in the Mazon Creek deposit. Like all Mazon scallops, they are only found in the Essex (marine) portion of the deposit. It has a relatively round shell compared to the much more common Aviculopecten. I actually collected this first specimen on M