Trematoda is a class of flatworms known as flukes or trematodes. They are obligate internal parasites with a complex life cycle requiring at least two hosts. The intermediate host, in which asexual reproduction occurs, is usually a snail. The definitive host, where the flukes sexually reproduce, is a vertebrate. Infection by trematodes can cause disease in all five traditional vertebrate classes: mammals, birds, amphibians, reptiles, and fish.
Bucephalidae is a family of trematodes that parasitize fish. They lack suckers, having instead a muscular organ called a "rhynchus" at the front end which they use to attach to their hosts. The characteristics of the rhynchus are used to help define the genera of the family. It is one of the largest digenean families, with 25 genera containing hundreds of described species. Bucephalids are cosmopolitan, having been recorded all over the world. They are parasites of fish from freshwater, marine, and brackish water habitat types.
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.
Paropecoelus is a genus of trematodes in the family Opecoelidae.
Pseudopecoeloides is a genus of trematodes in the family Opecoelidae.
The Diplectanidae are a family of monopisthocotylean monogeneans. They are all parasitic on the gills of fish. Diplectanids are small animals, generally around 1 mm in length. As parasites, they can be extremely numerous, up to several thousand on an individual fish.
Transversotrema atkinsoni is a species of parasitic flatworms found in nemipterids on Heron Island and Ningaloo Reef.
Transversotrema cardinalis is a species of parasitic flatworms found in lutjanines and haemulids on Lizard Island.
Transversotrema carmenae is a species of parasitic platyhelminthe found in nemipterids on Lizard Island.
Transversotrema damsella is a species of parasitic flatworms found in pomacentrids, labrids and mugilids on Lizard Island.
Transversotrema espanola is a species of parasitic platyhelminthe found in lutjanines on Heron Island and Lizard Island.
Transversotrema fusilieri is a species of trematodes found in caesionines on Lizard Island.
Transversotrema manteri is a species of trematodes found in caesionines on Lizard Island and Ningaloo Reef.
Transversotrema witenbergi is a species of trematodes found in caesionines on Heron Island.
Transversotrema borboleta is a species of parasitic flatworms found in chaetodontids and lutjanines on Heron Island and Lizard Island. It might be in fact a species complex.
Transversotrema elegans is a species of trematodes found from species of the labrid genus Choerodon on Heron Island and Lizard Island. It is characterised by its number of vitelline follicles enclosed by its cyclocoel and by the size of its testicle.
Transversotrema giganticum is a species of trematodes found in scarids on Heron Island and Lizard Island. It is characterised by its number of vitelline follicles enclosed by its cyclocoel and by the size of its testicle.
Transversotrema is a genus of trematodes in the family Transversotrematidae.
Transversotrematidae is a family of trematodes in the order Plagiorchiida. It is the only family in the superfamily Transversotrematoidea, which is the only superfmaily in the suborder Transversotremata. It has been synonymised with Circuitiocoeliidae Wang, 1981, Squamacolidae Pan & Wang, 1985, and Transversotrematinae Witenberg, 1944.
Pseudaxine is a genus which belongs to the phylum Platyhelminthes and class Monogenea; all its species are parasites of fish.
