Opisthorchiidae is a family of digenea

Digenea

Digenea is a subclass within the Platyhelminthes consisting of parasitic flatworms with a syncytial tegument and, usually, two suckers, one ventral and one oral. Adults are particularly common in the digestive tract, but occur throughout the organ systems of all classes of vertebrates...

ns, parasitic flatworm

Flatworm

The flatworms, known in scientific literature as Platyhelminthes or Plathelminthes are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrate animals...

s.

The most medically important species in the family Opisthorchiidae are Clonorchis sinensis

Clonorchis sinensis

Clonorchis sinensis, the Chinese liver fluke, is a human liver fluke in the class Trematoda, Phylum Platyhelminthes. This parasite lives in the liver of humans, and is found mainly in the common bile duct and gall bladder, feeding on bile...

, Opisthorchis viverrini

Opisthorchis viverrini

Opisthorchis viverrini, common name Southeast Asian liver fluke, is a trematode parasite from the family Opisthorchiidae that attacks the area of the bile duct. Infection is acquired when people ingest raw or undercooked fish. It causes the disease opisthorchiasis...

and Opisthorchis felineus

Opisthorchis felineus

Opisthorchis felineus, or cat liver fluke is a trematode parasite that infects the liver in mammals. It was first discovered in 1884 in a cat's liver by Sebastiano Rivolta of Italy. In 1891, Russian scientist K.N. Vinogradov found it in a human, and named the parasite a "Siberian liver fluke"...

, that are causing disease clonorchiasis

Clonorchiasis

Clonorchiasis is an infectious disease caused by the Chinese liver fluke, Clonorchis sinensis.Clonorchiasis is a known risk factor for the development of cholangiocarcinoma, a neoplasm of the biliary system....

.

Opisthorchiidae have cosmopolitan distribution

Cosmopolitan distribution

In biogeography, a taxon is said to have a cosmopolitan distribution if its range extends across all or most of the world in appropriate habitats. For instance, the killer whale has a cosmopolitan distribution, extending over most of the world's oceans. Other examples include humans, the lichen...

.

Subfamilies

There are 13 subfamilies in the family Opisthorchiidae, but their number is incosistent:

• Allogomtiotrematinae (Gupta, 1955) Yamaguti, 1958 - two genera
• Aphallinae Yamaguti, 1958 - one genus
• Delphinicolinae Yamaguti, 1933 - one genus
• Diasiellinae Yamaguti, 1958 - one genus
• Metorchiinae Luhe, 1909 - four genera
• Oesophagicolinae Yamaguti, 1933 - one genus
• Opisthorchiinae Yamaguti, 1899 - 14 genera
• Pachytrematinae (Railliet, 1919) Ejsmont, 1931 - one genus
• Plotnikoviinae (Skrjabin, 1945) Skrjabin et Petrov, 1950 - one genus
• Pseudamphimerinae Skrjabin et Petrov, 1950 - three genera
• Pseudamphistominae Yamaguti, 1958 - two genera
• Ratziinae (Dollfus, 1929) Price, 1940 - one genus
• Tubangorchiinae Yamaguti, 1958 - one genus

Genera

The family Opisthorchiidae consist of 33 valid genera:

• Agrawalotrema Sahay & Sahay, 1988
• Allogomtiotrema Yamaguti, 1958
• Amphimerus Barker, 1911
• Cladocystis Poche, 1926
• Clonorchis Looss, 1907
• Cyclorchis Luhe, 1908
• Delphinicola Yamaguti, 1933
• Diasiella Travassos, 1949
• Erschoviorchis Skrjabin, 1945
• Euamphimerus Yamaguti, 1941
• Evranorchis Skrjabin, 1944
• Gomtia Thapar, 1930
• Hepatiarius Fedzullaev, 1961
• Holometra Looss, 1899
• Metametorchis Morozov, 1939
• Metorchis Looss, 1899
• Microtrema Kobayashi, 1915
• Nigerina Baugh, 1958
• Oesophagicola Yamaguti, 1933
• Opisthorchis
  Opisthorchis
  Opisthorchis is a genus of flukes in the family Opisthorchiidae.-Species:Species in the genus Opisthorchis include:* Opisthorchis felineus * Opisthorchis gomtii Mehra, 1941* Opisthorchis parasiluri Long & Lee...
  
  Blanchard, 1895
• Pachytrema Looss, 1907
• Parametorchis Skrjabin, 1913
• Paropisthorchis Stephens, 1912
• Plotnikovia Skrjabin, 1945
• Pseudamphimerus Gower, 1940
• Pseudamphistomum Luhe, 1908
• Pseudogomtiotrema Gupta & Jain, 1991
• Ratzia Poche, 1926
• Satyapalia Lakshminarayana & Hafeezullah, 1974
• Thaparotrema Gupta, 1955
• Trionychotrema Chin & Zhang, 1981
• Tubangorchis Skrjabin, 1944
• Witenbergia Vaz, 1932