Choudhury, Daverdin & Brooks 2002. Wallinia chavarriae n. sp. (Trematoda: Macroderoididae) in Astyanax aeneus (Gunther, 1860) and Bryconamericus scleroparius (Regan, 1908) (Osteichthyes: Characidae) from the Area de Conservacion Guanacaste, Costa Rica. Journal of Parasitology, 88(1), February 2002: 107-112