Hexagrammia

Hexagrammia
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Trematoda
Order:	Plagiorchiida
Family:	Opecoelidae
Subfamily:	Stenakrinae
Genus:	Hexagrammia; Baeva, 1965 [1]

Last updated April 07, 2019

Hexagrammia is a genus of trematodes in the family Opecoelidae.

A genus is a taxonomic rank used in the biological classification of living and fossil organisms, as well as viruses, in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.

Trematoda is a class within the phylum Platyhelminthes. It includes two groups of parasitic flatworms, known as flukes.

Family is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as being the "walnut family".

Species

Hexagrammia longitestis Schell, 1973^[2]
Hexagrammia zhukovi Baeva, 1965^[1]

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Trematodes are parasitic flatworms of the class Trematoda, specifically parasitic flukes with two suckers: one ventral and the other oral. Trematodes are covered by a tegument, which simultaneously protects the organism from the environment and provides secretory and absorptive functions.

Rugogastridae is a family of trematodes in the order Aspidogastrida. It consists of a single genus, Rugogaster Schell, 1973.

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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.

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Helicometra is a genus of trematodes in the class Opecoelidae. It is synonymous with AllostenoperaBaeva, 1968, MetahelicometraYamaguti, 1971, and StenoperaManter, 1933. Its type species is H. fasciata(Rudolphi, 1819). They are distinguished by their unique spiral uterus, from which their name is derived.

Helicometrina is a genus of trematodes in the family Opecoelidae.

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Stenakron is a genus of trematodes in the family Opecoelidae.

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References

1 2 Baeva, O. M. (1965). Helminth fauna of far-eastern mackerel. In Leonov, V. A., Mamaev, Y. L. & Oshmarin, P. G. (Eds.), Parasitic worms of domestic and wild animals. Papers on helminthology presented to Professor A. A. Sobolev on the 40th anniversary of his scientific and teaching activity (pp. 23–32). Vladivostok: Dalnevostochnii Gosudarstvennii Universitet.
↑ Schell, S. C. (1973). Three new species of digenetic trematodes from Puget Sound fishes. Proceedings of the Helminthological Society of Washington, 40, 227–230.

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[I-1] 1 2 Baeva, O. M. (1965). Helminth fauna of far-eastern mackerel. In Leonov, V. A., Mamaev, Y. L. & Oshmarin, P. G. (Eds.), Parasitic worms of domestic and wild animals. Papers on helminthology presented to Professor A. A. Sobolev on the 40th anniversary of his scientific and teaching activity (pp. 23–32). Vladivostok: Dalnevostochnii Gosudarstvennii Universitet.

[II-2] Schell, S. C. (1973). Three new species of digenetic trematodes from Puget Sound fishes. Proceedings of the Helminthological Society of Washington, 40, 227–230.