W. E.  Moser, Richardson, D. J., Wheeler, B. A., Irwin, K. J., Daniels, B. A., Trauth, S. E., and Klemm, D. J., ?Placobdella cryptobranchii (Rhynchobdellida : glossiphoniidae) on Cryptobranchus alleganiensis bishopi (Ozark Hellbender) in Arkansas and Missouri?, Comparative Parasitology, vol. 75, pp. 98-101, 2008.