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Scientific classification
Domain: Eukaryota
(unranked): SAR
(unranked): Alveolata
Phylum: Apicomplexa
Class: Conoidasida
Subclass: Gregarinasina
Order: Eugregarinorida
Suborder: Blastogregarinorina
Chatton & Villeneuve 1936
Families and genera

Blastogregarinorina is a suborder of parasitic alveolates of the phylum Apicomplexia


This suborder currently has one family with one genus which contains one species Siedleckia caulleryi. This species is found in marine polychaetes.


This suborder was described by Chatton and Villeneuve in 1936[1]


A mucron is present

Syzygy does not occur.

The gamonts are composed of a single structure without septa: they lack both protomerites and deutomerites.

Anisogamy — unequal sized gamonts — is present. Gamogony occurs with gamonts still attached to intestinal wall. The gametes bud off gamonts. Gametocysts are absent

There is no sporocyst.

The zygote gives rise to 10–16 oocysts.