Cooper, G. A. 1977. Brachiopods from the Caribbean Sea and the Adjacent Waters, F. M. Bayer and G. L. Voss, eds. University of Miami Press, Coral Gables, Florida. 212 pp.
Added keyword "endemic to Gulf of Mexico?"
Santagata, S. and J. W. Tunnell Jr. 2009. Brachiopoda of the Gulf of Mexico, Pp. 1137–1141 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
Harte Research Institute for Gulf of Mexico Studies. 2016. GulfBase: Resource Database for Gulf of Mexico Research, Education, and Management. Texas A&M University-Corpus Christi. World Wide Web electronic publication. http://www.gulfbase.org, [Today's Date].