blastogregarinorina blastogregarinorina blastogregarinorina is a suborder of parasitic alveolates of the phylum apicomplexia blastogregarinorina scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: apicomplexa class: conoidasida subclass: gregarinasina order: eugregarinorida suborder: blastogregarinorinachatton & villeneuve 1936 families and genera siedleckiidae siedleckia taxonomy this suborder currently has one family with one genus which contains one species siedleckia caulleryi. this species is found in marine polychaetes. history this suborder was described by chatton and villeneuve in 1936 description 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.