Leo Margolis, was a Canadian parasitologist. He was a pioneer in the use of parasites for identification of Pacific Ocean fish stocks. His discoveries became a crucial point in negotiations over pacific salmon fisheries, as it could now be determined where each individual fish spawned, in the rivers of Canada or the United States.
Opecoelidae is a family of trematodes. It is the largest digenean family with over 90 genera and nearly 900 species, almost solely found in marine and freshwater teleost fishes. It was considered by Bray et al. to belong in the superfamily Opecoeloidea Ozaki, 1925 or the Brachycladioidea Odhner, 1905.
Pseudopecoeloides is a genus of trematodes in the family Opecoelidae.
Biospeedotrema jolliveti is a species of trematodes inhabiting hydrothermal vent fishes in the south eastern Pacific Ocean. It can be distinguished from its family by its symmetrical testicular configuration; its uterus passing between the testes. Furthermore, it can be differentiated by vitelline fields which extend slightly into its post-testicular region; its intestinal bifurcation is dorsal to its ventral sucker; its genital pore is somewhat submedian or median; its cirrus sac is short and the caeca are large and overlap the testes.
Buticulotrema thermichthysi is a species of trematodes inhabiting hydrothermal vent fishes in the south eastern Pacific Ocean. It can be distinguished from its family by its symmetrical testicular configuration; its uterus passing between the testes. Furthermore, it can be differentiated from its cogenerate species by its long and strongly muscular oesophagus, that bifurcates dorsally to the posterior part of the animal's ventral sucker; its long and narrow pars prostatica and distal male duct, as well as its sinistral genital pore that can be found at the level of its pharynx.
Allopodocotyle is a genus of trematodes in the family Opecoelidae.
Anomalotrema is a genus of trematodes in the family Opecoelidae.
Buticolotrema is a genus of trematodes in the family Opecoelidae.
Dactylostomum is a genus of trematodes in the family Opecoelidae. It is synonyised with Opedunculata Dwivedi, 1975.
Gaevskajatrema is a genus of trematodes in the family Opecoelidae.
Neohelicometra is a genus of trematodes in the family Opecoelidae. It consists of only one species, Neohelicometra scorpaenae Siddiqi & Cable, 1960.
Neolebouria is a genus of trematodes in the family Opecoelidae.
Pellamyzon is a genus of trematodes in the family Opecoelidae. It consists of one species, Pellamyzon abitionis Gibson & Bray, 1982.
Pseudopecoelus is a genus of trematodes in the family Opecoelidae. It has been synonymised with Neopecoelus Manter, 1947.
Tellervotrema is a genus of trematodes in the family Opecoelidae.
Labracetabulum is a genus of trematodes in the family Opecoelidae. Cribb's review of Labracetabulum synonymised it with Prolabria Reimer, 1987, which led to the synonymisation of P. monocentris Reimer, 1987 to L. monocentris Cribb, 2005.
Biospeedotrema is a genus of trematodes in the family Opecoelidae.
Helicometrinae is a subfamily of trematodes in the family Opecoelidae.
Bentholebouria is a genus of trematodes in the family Opecoelidae.
Neochoanostoma is a genus of trematodes in the family Opecoelidae.
