Castillo-Fernandez, D., and P. J. D. Lambshead. 1990. Revision of the genus Elzalia Gerlach, 1957 (Nematoda: Xyalidae) including three new species from an oil producing zone in the Gulf of Mexico, with a discussion of the sibling species problem. Bulletin of the British Museum (Natural History) Zoology 56: 63–71.
Added keyword "endemic to Gulf of Mexico"
Hope, W. D. 2009. Free-Living Marine Nematoda of the Gulf of Mexico, Pp. 1111–1123 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].