Arkansas supports a diverse variety of endemic biota with most found in the Interior Highlands (Ozarks and Ouachitas) of the state. Since 1988, several compilations have updated the number of endemics known while some former endemic species have been found in other states and subsequently removed from the state list. Here, update to the list by adding 13 taxa, several of which are fish parasites, making a grand total of 139 current endemic species in Arkansas.
Robison, H. W. and McAllister, C. T.
"Arkansas Endemic Flora and Fauna An Update with 13 Additional Species,"
Journal of the Arkansas Academy of Science: Vol. 69
, Article 16.
Available at: http://scholarworks.uark.edu/jaas/vol69/iss1/16