Britton, Joseph; Britton, David; Britton, Michael & La Grove, M. Cyrtonaias tampicoensis, Specimen #199, specimen, August 26, 1979; (https://digital.library.unt.edu/ark:/67531/metadc35396/m1/1/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .