{{Short description|Genus of flatworms}} {{Automatic taxobox | image = | image_caption = | taxon = Atriostella | authority = 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.<ref name="Unnithan1971">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.</ref>
==Species== According to the World Register of Marine Species,<ref>WoRMS (2019). ''Atriostella'' Unnithan, 1971. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=717522 on 2019-11-27</ref> 2 species have been attached to this genus:
{{columns-list|colwidth=25em| * ''Atriostella otolithus'' <small>Unnithan, 1971</small><ref name="Unnithan1971"/> * ''Atriostella sciaenae'' <small>(Goto, 1894) Unnithan, 1971</small> currently included in ''Diplostamenides'' as ''Diplostamenides sciaenae'' <small>(Goto, 1894) Mamaev, 1986</small><ref name="Goto1894">{{cite journal|last1=Goto|first1=Seitaro.|title=Studies on the ectoparasitic Trematodes of Japan|year=1894|doi=10.5962/bhl.title.56506|doi-access=free|hdl=2027/coo.31924003409327|hdl-access=free}}</ref> }}
==References== {{Reflist}}
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Category:Microcotylidae Category:Monogenea genera