Apostomatida
The Apostomatida are an order of ciliates from the class Oligohymenophorea. Individual organisms from this the order are called apostomes. They are symbiotic with Crustacea. For majority of their life cycle they are dormant and encysted on their host's exoskeleton. The life cycle of apostomes varies; most genera will multiply through the biological process of fission causing the larvae to develop within the crustacean host. Physical characteristics may include a small cytostome (mouth), often accompanied by a glandular rosette and sparse hair like projections (cilia) arranged in spiral rows on the organism.
| Apostomatida | |
|---|---|
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| SEM image of Collinia sp., which can cause mass mortality in affected krill populations | |
Scientific classification  | |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Alveolata |
| Phylum: | Ciliophora |
| Class: | Oligohymenophorea |
| Subclass: | Apostomatia |
| Order: | Apostomatida Chatton & Lwoff, 1928 |
| Families[1] | |
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References
- Warren, A. (2019). World Ciliophora Database. Apostomatida. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=162985 on 2019-01-07
- Bradbury, Phyllis C.; Trager, William (October 1967). "Excystation of apostome ciliates in relation to molting of their crustacean hosts. II. Effect of glycogen" (PDF). Biological Bulletin. 133 (2): 310–6.
- "Apostome". Encyclopædia Britannica.
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