Rafinesque, C. S., 1820. Annals of nature or annual synopsis of new genera and species of animals, plants, & c. discovered in North America. Annals of Nature 1: 1-16. «Enllaç». Arxivat de l'original el 2016-03-03. [Consulta: 25 juny 2012].
H. Robison, C. McAllister, C. Carlton i G. Tucker, 2008. The Arkansas Endemic Biota: An Update with Additions and Deletions. Journal of the Arkansas Academy of Science, Vol. 62. «PDF».(anglès)
Rafinesque, C. S., 1820. Annals of nature or annual synopsis of new genera and species of animals, plants, & c. discovered in North America. Annals of Nature 1: 1-16. «Enllaç». Arxivat de l'original el 2016-03-03. [Consulta: 25 juny 2012].
