Two new species of Pseudochristianella Campbell & Beveridge, 1990 (Cestoda: Trypanorhyncha) from elasmobranch fishes from the Gulf of California, MexicoR.A. Campbell and I. BeveridgeParasite, 13 4 (2006) 275-281DOI: https://doi.org/10.1051/parasite/2006134275