Alveocystis is a genus in the phylum Apicomplexa. Species in this genus infect worms of the family Priapuloidea and molluscs. This genus has been poorly studied and little is known about it.
This genus was created by Bel'tenev in 1980.
The recognised first species of this genus was Alveocystis macrocoronata by Lüling in 1942.
Four species are recognised in this genus. Morphologically they resemble members of the genus Pfeifferinella.
The oocysts have no sporocysts. A distinct convex micropyle is usually present at one end of the oocyst. Within each oocyst there are 8 or more free sporozoites and a large oocyst residuum.
- ^ Bel'tenov, AE (1980) Alveocystis intestinalis n. sp., n. gen. - a new species of coccidian from the intestine of Priapulida. Voprosy Parasitl Voddnyk Bespozvon. Zhivotnykh (Temat. Sbornik), Vilnyus, USSR 1980:10-11
- ^ Luling KH (1943) Uber eine neue Coccidie im Darm der Pripuliden: Priapulus caudatus (Lam.) und Halicryptus spinulosus (v. Sieb.). Archiv fur Protistenkunde 96:39-74