Schram, Frederick R. 1979. Worms of the Mississippian Bear Gulch Limestone of central Montana, USA. Transactions of the San Diego Society of Natural History, 19(9): 107-120.[details]
original descriptionSchram, Frederick R. 1979. Worms of the Mississippian Bear Gulch Limestone of central Montana, USA. Transactions of the San Diego Society of Natural History, 19(9): 107-120.[details]
Present Inaccurate Introduced: alien Containing type locality