Plasmodiophorid Sporogenic Stages
Cruciform divisions occur in early stages of sporogenic development, and noncruciform divisions (meiosis) occur in later stages. Sporogenic plasmodia will cleave and produce resting spores, which may be aggregated in sporosori. Some literature refers to the resting spores as cysts, and the sporogenic plasmodia as cystogenous plasmodia. Karling's 1981 article (Woronina leptolegniae n. sp., a plasmodiophorid parasite of Leptolegnia. Nova Hedwigia 35: 17-24) discussed the rationale for using resting spore and sporogenic in place of cyst and cystogenous respectively.
Images of Young Sporogenic Plasmodia