Ascetosporea
group of Rhizaria that are parasites of animals
The Ascetosporea are a group of eukaryotes that are parasites of animals, especially marine invertebrates. The two groups, the haplosporids and paramyxids, are not particularly similar morphologically, but consistently group together on molecular trees, which place them near the base of the Cercozoa. Both produce spores without the complex structures found in similar groups (such as polar filaments or tubules).
Haplosporid spores have a single nucleus and an opening at one end, covered with an internal diaphragm or a distinctive hinged lid. After emerging, it develops within the cells of its host, usually a marine mollusc or annelid, although some infect other groups or freshwater species. The trophic cell is generally multinucleated. Paramyxids develop within the digestive system of marine invertebrates, and undergo internal budding to produce multicellular spores.
A 2009 study concluded that Haplosporidium species form a paraphyletic group and that the taxonomy of the haplosporidians needs a thorough revision.
Taxonomy
Class Ascetosporea Desportes & Ginsburger-Vogel, 1977 emend. Cavalier-Smith 2009
Genus ?Marteilioides Comps, Park & Desportes 1986
Genus ?Oryctospora Purrini & Weiser 1991
Order Claustrosporida Cavalier-Smith 2003
Family Claustrosporidiidae Larsson 1987
Genus Claustrosporidium Larsson 1987
Order Paradiniida Cavalier-Smith in Bass et al.
“Ascetosporea” enters the record as group of Rhizaria that are parasites of animals. Crown Archives preserves that source wording while asking what Ascetosporea, group and Rhizaria can confirm, complicate or overturn.
Why this record matters
“Ascetosporea” is worth following because a concise public description often conceals a longer documentary argument. Here, Ascetosporea, group and Rhizaria provides the most credible route into that argument.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 15, 2026. The linked authority identifier is Q19844735. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2009, 1977, 1986 and 1991.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Ascetosporea”, its source revision and the description used here.
- Expand the search: follow Ascetosporea primary sources, Ascetosporea archive and Ascetosporea research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Ascetosporea”?
- Which institution is responsible for the underlying evidence?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Ascetosporea” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.