''Protocotyle '' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

monogenea Monogeneans, members of the class Monogenea, are a group of ectoparasitic flatworms commonly found on the skin, gills, or fins of fish. They have a direct lifecycle and do not require an intermediate host. Adults are hermaphrodites, meaning they ...

ns in the family

Hexabothriidae Hexabothriidae is a family of monogenean parasites. The family name was proposed by Emmett W. Price in 1942.Price, E. W. 1942: North American monogenetic trematodes. V. The family Hexabothriidae n. n. (Polystomatoidea). Proceedings of the Helmint ...

. The

was created by

Louis Euzet Louis Euzet (27 July 1923 in Lézignan-Corbières, France – 24 September 2013 in Sète, France) was a French parasitologist. Education Louis Euzet was a high-school student in Narbonne, France, and a student of the University of Montpelli ...

and Claude Maillard in 1974. ''Protocotyle'' includes only three species, which are all parasitic on the

gill A gill () is a respiration organ, respiratory organ that many aquatic ecosystem, aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow r ...

s of

shark Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the ...

s of the genus ''

Hexanchus The sixgill sharks are a genus, ''Hexanchus'', of deepwater sharks in the family Hexanchidae. These sharks are characterized by a broad, pointed head, six pairs of gill slits, comb-like, yellow lower teeth, and a long tail. The largest species c ...

'', namely ''

Hexanchus griseus The bluntnose sixgill shark (''Hexanchus griseus''), often simply called the cow shark, is the largest Hexanchiformes, hexanchoid shark, growing to in length. It is found in tropical and temperate waters worldwide and its diet is widely varied b ...

'' and ''

Hexanchus nakamurai The bigeyed sixgill shark (''Hexanchus nakamurai'') is a cow shark of the family Hexanchidae. Its dorsal surface has a brownish-gray color, and is sharply separated from the light coloring of its ventral surface. The eyes are a fluorescent gree ...

''. The species are: * ''

Protocotyle euzetmaillardi ''Protocotyle euzetmaillardi'' is a species of monogenean of the family Hexabothriidae. It is the third described species of the genus '' Protocotyle'', after '' Protocotyle grisea'' (Cerfontaine, 1899) Euzet & Maillard, 1974Euzet, L. & Maillar ...

'' Justine, 2011 * '' Protocotyle grisea'' (Cerfontaine, 1899) Euzet & Maillard, 1974 Cerfontaine, Paul. 1899: Contribution à l'étude des Octocotylidés. V. Les Onchocotylinae. Archives de Biologie, 16, 345-478 + Plates 18-21.Euzet, L. & Maillard, C. 1974: Les Monogènes Hexabothriidae Price, 1942. Historique, systématique, phylogenèse. Bulletin du Muséum National d'Histoire Naturelle, 3° série, 206, Zoologie 136, 113-141. * ''

Protocotyle taschenbergi ''Protocotyle '' is a genus of monogeneans in the family Hexabothriidae. The genus was created by Louis Euzet and Claude Maillard in 1974. ''Protocotyle'' includes only three species, which are all parasitic on the gills of sharks of the genus ...

'' (Maillard & Oliver, 1966) Euzet & Maillard, 1974 Maillard, C. & Oliver, G. 1966: Monogenea, Hexabothriidae. Vie et Milieu Série A: Biologie marine, 17, 1201-1216.

References

{{Taxonbar, from=Q18583148 Polyopisthocotylea Monogenea genera