Fischoederius upiensis new species from ruminants in the Philippines with remarks on other species of the genus Fischoederius Stiles & Goldberger, 1910 (Trematoda: Paramphistomoidea: Gastrothylacidae). Philippine Journal of Veterinary Medicine, 45(1), June 2008: 22-29. 23 [Zoological Record Volume 144]