Atriostella

Atriostella
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Monogenea
Subclass:	Polyopisthocotylea
Family:	Microcotylidae
Subfamily:	Microcotylinae
Genus:	Atriostella; Unnithan, 1971

Atriostella is a genus which belongs to the family Microcotylidae and class Monogenea. As all Monogenea, species of Atriostella are ectoparasites that affect their host by attaching themselves as larvae on the gills of the fish and grow into adult stage. This larval stage is called oncomiracidium, and is characterized as free swimming and ciliated.

This genus was proposed by Unnithan in 1971 who included in this genus two subgenera: the subgenus Atriostella with a single middorsal unarmed vaginal pore; and the subgenus Biplacunella with a ventral cuticular post-atrial body plaque and a much wider dorsal plaque behind the two unarmed vulvae.

Members of the genus Atriostella are characterised by a generally symmetrical haptor, a genital atrium armed with erect long spines of and a muscular penis lobed or not and entirely unarmed.[1]

Species

According to the World Register of Marine Species,[2] 2 species have been attached to this genus:

Atriostella otolithus Unnithan, 1971[1]
Atriostella sciaenae (Goto, 1894) Unnithan, 1971 currently included in Diplostamenides as Diplostamenides sciaenae (Goto, 1894) Mamaev, 1986[3]

References

Unnithan, R. V. (1971). On the functional morphology of a new fauna of Monogenoidea on fishes from Trivandrum and environs. Part IV. Microcotylidae sensu stricto and its repartition into subsidiary taxa. American Midland Naturalist, 366-398.
WoRMS (2019). Atriostella Unnithan, 1971. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=717522 on 2019-11-27
Goto, Seitaro. (1894). "Studies on the ectoparasitic Trematodes of Japan". doi:10.5962/bhl.title.56506. Cite journal requires |journal= (help)

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[Unnithan1971-1] Unnithan, R. V. (1971). On the functional morphology of a new fauna of Monogenoidea on fishes from Trivandrum and environs. Part IV. Microcotylidae sensu stricto and its repartition into subsidiary taxa. American Midland Naturalist, 366-398.

[2] WoRMS (2019). Atriostella Unnithan, 1971. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=717522 on 2019-11-27

[Goto1894-3] Goto, Seitaro. (1894). "Studies on the ectoparasitic Trematodes of Japan". doi:10.5962/bhl.title.56506. Cite journal requires |journal= (help)