''Isancistrum'' 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 Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Gyrodactylidae ''Gyrodactylidae'' is a Family (biology), family of flatworms in the Order (biology), order Gyrodactylidea. Genera *''Acanthoplacatus'' Ernst, Jones & Whittington, 2001Ernst, I., Jones, M. & Whittington, I. (2001). A new genus of viviparous gyro ...

. Unlike most monogeneans which are

parasitic Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The ent ...

fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...

or other

vertebrates Vertebrates () are animals with a vertebral column (backbone or spine), and a cranium, or skull. The vertebral column surrounds and protects the spinal cord, while the cranium protects the brain. The vertebrates make up the subphylum Vertebra ...

, species of ''Isancistrum'' are parasitic on

squids A squid (: squid) is a mollusc with an elongated soft body, large eyes, eight arms, and two tentacles in the orders Myopsida, Oegopsida, and Bathyteuthida (though many other molluscs within the broader Neocoleoidea are also called ''squi ...

(

molluscs Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

Species

*'' Isancistrum loliginis'' de Beauchamp, 1912 *'' Isancistrum subulatae'' Llewellyn, 1984Llewellyn, J. (1984). The biology of ''Isancistrum subulatae'' n. sp., a monogenean parasitic on the squid, ''Alloteuthis subulata'', at Plymouth. ''Journal of the Marine Biological Association of the United Kingdom'', 64(2), 285–302.

References

Gyrodactylidae Monogenea genera {{monogenea-stub