Acervularia whitfieldi

Fenton, C. L.; Fenton, M. A. (1924). The stratigraphy and fauna of the Hackberry stage of the Upper Devonian. <em>Contributions from the Museum of Geology, University of Michigan.</em> 1: i-xii, 1-260.

Stumm, E. C. (1949). Lower Middle Devonian species of the tetracoral genus Hexagonaria of east-central North America. <em>Contributions from the Museum of Paleontology, University of Michigan.</em> 7(2): 7-49, pls. 1-14.