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Variations in Mitotic Mechanisms Taylor (1976)

A. Dinoflagellates, trichomonads, hypermastigids: spindle totally extranuclear, kinetochores in the nuclear envelope, if present. with or without visible spindle inducers (centrioles?).  B. Euglenoids, trypanosomes, bodonids: totally intranuclear spindle.  C. Xanthophytes, prasinophytes, chlorophytes, and probably chloromonads: intranuclear spindle with associated extranuclear elements. D. Cryptomonads, chrysomonads, diplomonads: semi-open mitosis - entry of extranuclear spindles through polar fenestrae. E. Eustigmatophytes, haptophytes, prasinophytes, chlorophytes, open mitosis.