Hoberg, E. P.; Brooks, D. R.; Molina-Urena, 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. The Journal of Parasitology. 84(3): 571.
Hoberg, E. P.; Brooks, D. R.; Molina-Urena, 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