Conoidasida: Difference between revisions
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{{Short description|Class of single-celled organisms}} |
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{{Taxobox |
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{{Automatic taxobox |
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| image = Emaxima oocysts usda.jpg |
| image = Emaxima oocysts usda.jpg |
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| image_alt = "Eimeria maxima" oocysts |
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| image_width = 210px |
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| image_caption = ''[[Eimeria maxima]]'' |
| image_caption = ''[[Eimeria maxima]]'' [[oocyst]]s |
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| taxon = Conoidasida |
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| authority = Levine, 1988 |
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| domain = [[Eukaryota]] |
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| synonyms = |
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| regnum = [[Chromalveolata]] |
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| synonyms_ref = |
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| superphylum = [[Alveolata]] |
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| ⚫ | |||
| phylum = [[Apicomplexa]] |
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| classis = '''Conoidasida''' |
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| subdivision = |
| subdivision = |
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*[[Coccidia]] <small></small> |
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[[Eucoccidiorida]] |
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*[[Gregarinasina]] <small></small> |
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}} |
}} |
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'''Conoidasida''' is a class of protists. It contains one order, [[Eucoccidiorida]]. |
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'''Conoidasida''' is a [[class (biology)|class]] of parasitic [[Alveolata|alveolate]]s in the phylum [[Apicomplexa]]. The class was defined in 1988 by Levine<ref>{{cite book|title=The protozoan phylum Apicomplexa|number=v. 1|series=The Protozoan Phylum Apicomplexa|author=Levine, N.D.|isbn=978-0-8493-4653-8|year=1988|publisher=CRC Press}}</ref> and contains two subclasses – the [[coccidia]] and the [[gregarine]]s. All members of this class have a complete, hollow, truncated [[conoid (organelle)|conoid]]. Gregarines tend to [[parasitism|parasitize]] [[invertebrate]]s with the mature [[gametocyte|gamont]]s being extracellular; the coccidia mostly infect [[vertebrate]]s and have intracellular gamonts. |
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==Description== |
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A conoid is found in most species and when present forms complete but truncated cone. |
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Sexual and asexual reproduction are present in [[biological life cycle|life cycle]] of all [[species]]. Each [[zygote]] normally forms an [[oocyst]] wall within which it undergoes [[meiosis]]. This is sometimes followed by [[mitosis]]. This process of [[sporogony]] produces mobile vermiform infectious [[sporozoite]]s. |
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Multiple mitotic divisions ([[schizogony]]) also occur during [[protozoal merogony|merogony]] of the feeding stages ([[trophozoite]]s) and during [[gametogony]]. |
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===Motility=== |
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[[Microgamete]]s of some species are [[flagella]]ted. Locomotion of other [[gamete]]s and any other motile stages is by [[gliding motility|gliding]] or body flexion. Some species possess [[pseudopodia]] but use them only in [[phagocytosis]]. |
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==References== |
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{{Reflist}} |
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==External links== |
==External links== |
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* {{ITIS| |
* {{ITIS |id=553100 |taxon=''Conoidasida'' |access-date=June 1, 2007}} |
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{{Alveolata}} |
{{Alveolata}} |
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{{Taxonbar|from=Q3178797}} |
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[[id:Conoidasida]] |
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[[Category:Apicomplexa classes]] |
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Latest revision as of 02:16, 23 February 2023
| Conoidasida | |
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| Eimeria maxima oocysts | |
Scientific classification 
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| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Alveolata |
| Phylum: | Apicomplexa |
| Class: | Conoidasida Levine, 1988 |
| Subclasses | |
Conoidasida is a class of parasitic alveolates in the phylum Apicomplexa. The class was defined in 1988 by Levine[1] and contains two subclasses – the coccidia and the gregarines. All members of this class have a complete, hollow, truncated conoid. Gregarines tend to parasitize invertebrates with the mature gamonts being extracellular; the coccidia mostly infect vertebrates and have intracellular gamonts.
Description[edit]
A conoid is found in most species and when present forms complete but truncated cone.
Sexual and asexual reproduction are present in life cycle of all species. Each zygote normally forms an oocyst wall within which it undergoes meiosis. This is sometimes followed by mitosis. This process of sporogony produces mobile vermiform infectious sporozoites.
Multiple mitotic divisions (schizogony) also occur during merogony of the feeding stages (trophozoites) and during gametogony.
Motility[edit]
Microgametes of some species are flagellated. Locomotion of other gametes and any other motile stages is by gliding or body flexion. Some species possess pseudopodia but use them only in phagocytosis.
References[edit]
- ^ Levine, N.D. (1988). The protozoan phylum Apicomplexa. The Protozoan Phylum Apicomplexa. CRC Press. ISBN 978-0-8493-4653-8.
External links[edit]
- "Conoidasida". Integrated Taxonomic Information System. Retrieved June 1, 2007.
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