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Scientific classification
Domain: Eukaryota
(unranked): SAR
(unranked): Alveolata
Phylum: Apicomplexa
Class: Conoidasida
Subclass: Coccidiasina
Order: Eucoccidiorida
Suborder: Eimeriorina
Family: Aggregatidae
Genus: Angeiocystis
Brasil, 1904

Angeiocystis audouinae

Angeiocystis is a genus of parasitic protozoa belonging to the phylum Apicomplexa.


This genus was created in 1904 by Brasil.[1]

Currently there is only one species recognised in this genus.

Life cycle[edit]

This species infects the heart of marine polychaete worms

The sporocyts may contain up to 30 sporozoites. The sporozoites are slender and curved with length of up to 25 µm.

The gamonts are initially sausage shaped and later become spherical.

The microgametes are biflagellated and several are formed from each microgametocyte.

Host records[edit]

This parasite was described from the worm Cirriformia tentaculata (family Cirratulidae). This genus was previously known as Audouinia.


  1. ^ Brasil L (1904) CR Acad Sci Paris 139: 646