Scientific classification
Domain: Eukaryota
(unranked): Sar
(unranked): Alveolata
Phylum: Apicomplexa
Class: Conoidasida
Subclass: Gregarinasina
Order: Archigregarinorida
Family: Selenidioididae
Genus: Selenidioides

Selenidioides axiferens
Selenidioides caulleryi
Selenidioides fanthami
Selenidioides giganteum
Selenidioides grassei
Selenidioides hawesi
Selenidioides hollandei
Selenidioides intraepitheliale
Selenidioides mesnili
Selenidioides metchnikovi
Selenidioides potamillae
Selenidioides sipunculi

Selenidioides are a genus of parasitic protozoa in the phylum Apicomplexa. Species in this genus infect marine invertebrates.


The order Archigregarinorida was redefined by Levine in 1971.[1] This reorganisation lead to the creation of two new families (Exoschizonidae and Selenidioididae) and several genera including Selenidioides.

There are 11 species in this genus.

Life cycle

The parasites in the genus infect the gastrointestinal tract and are presumably transmitted by the orofaecal route but the details of this mechanism are presently unknown.


  1. Levine N D (1971) Taxonomy of the Archigregarinorida and Selenidiidae (Protozoa, Apicomplexa) J Euk Micro 18 (4) 704-717 DOI: 10.1111/j.1550-7408.1971.tb03401.x

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