Hoberg, E.P. & Brooks, D.R. & Molina-Ureña, H. & Erbe, E. (1998)
Echinocephalus janzeni n. sp. (Nematoda: Gnathostomatidae) in Himantura pacifica (Chondrichthyes: Myliobatiformes) from the Pacific coast of Costa Rica and Mexico, with historical biogeographic analysis of the genus. Journal of Parasitology, 84(3), 571–581