Citation: Peridinioideae (Autonym).
Diagnosis: Peridiniaceans in which the episomal tabulation is cinctioid and/or intraspecifically variable in number and shape of constituent plates. Type genus: Extant genus:Durinskia Carty and Cox 1986. Kansodinium Carty and Cox 1986. Kryptoperidinium Lindemann 1924.
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