Editing Digenea (section)

===Key features===
Characteristic features of the Digenea include a syncytial tegument; that is, a tegument where the junctions between cells are broken down and a single continuous cytoplasm surrounds the entire animal. A similar tegument is found in other members of the [[Neodermata]]; a group of [[Platyhelminthes|platyhelminths]] comprising the Digenea, [[Aspidogastrea]], [[Monogenea]] and [[Cestoda]].  Digeneans possess a [[vermiform]], unsegmented body-plan and have a solid [[parenchyma]] with no [[body cavity]] ([[coelom]]) as in all platyhelminths.

[[File:Peerj-292-fig-7 Zoogonidae.png|thumb|Anterior sucker of ''[[Overstreetia cribbi]]'' a [[Zoogonidae|zoogonid]] digenean<ref>{{Cite journal  | last1 = Bray | first1 = RA. | last2 = Justine | first2 = J-L. | title = A review of the Zoogonidae (Digenea: Microphalloidea) from fishes of the waters around New Caledonia, with the description of ''Overstreetia cribbi'' n. sp. | journal = PeerJ | volume = 2 | pages = e292 | year = 2014 | doi = 10.7717/peerj.292 | pmid = 24688868|pmc = 3961169 | doi-access = free }}</ref>]]
There are typically two [[Sucker (zoology)|sucker]]s, an [[anterior]] [[Wiktionary:oral|oral]] sucker surrounding the [[mouth]], and a [[ventral]] sucker sometimes termed the [[acetabulum (morphology)|acetabulum]], on the ventral surface.  The oral sucker surrounds the mouth, while the ventral sucker is a blind muscular organ with no connection to any internal structure.

A ''monostome'' is a worm with one sucker (oral). [[Trematoda|Flukes]] with an oral sucker and an acetabulum at the posterior end of the body are called ''Amphistomes''. ''Distomes'' are flukes with an oral sucker and a ventral sucker, but the ventral sucker is somewhere other than posterior.  These terms are common in older literature, when they were thought to reflect systematic relationships within the groups.  They have fallen out of use in modern digenean taxonomy.