This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
Corresponding author (Name, Year)
Ref.: B. Willard. 1928. The brachiopods of the Ottosee and Holston formations of Tennessee and Virginia. Bulletin of the Harvard Museum of Comparative Zoology 68:255-292