Selenidium
Selenidium | |
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Scientific classification | |
Domain: | Eukaryota
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(unranked): | |
(unranked): | Alveolata
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Phylum: | |
Class: | |
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Family: | |
Genus: | Selenidium Giard, 1884
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Species | |
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Selenidium is a genus of parasitic alveolates in the phylum Apicomplexa. Species in this genus infect marine invertebrates.
Taxonomy[]
This genus was created by Giard in 1884.[1] Fifty six species have been described in this genus.
The type species is Giard, 1884.
Description[]
All species in this genus infect marine invertebrates.
Life cycle[]
These species infect the gut of polychaete worms.
The trophozoites are vermiform with an apical complex. They have few epicytic folds. A dense array of microtubules lies under a trilayered pellicle.
Syzygy occurs in the tail-to-tail, head-to-head and lateral positions.
The are extracellular. They are foliaceous or cylindroid in shape and have longitudinal striations.
The oocysts are spherical or ovoid, are 12-18 microns in diameter and their wall is 1 micron thick. They have four infective sporozoites each.
The sporozoites undergo schizogony (merogony).
References[]
- ^ Giard A (1884). Note sur un nouveau groups de protozoaire parasites des annelides et sur q points de l'histoire des gregarines (S. pendija). C r Assoc fr Avnnc Set, Cotigr Blois p. 19
- Apicomplexa genera
- Apicomplexa stubs