obsolete mitotic catastrophe with abnormal nuclear envelope partitioning true mitotic catastrophe with abnormal nuclear envelope partitioning during vegetative growth This term was made obsolete because "mitotic catastrophe" has not been clearly defined for fission yeast. midori FYPO:0006691 cut-like mitotic catastrophe with abnormal nuclear envelope partitioning during mitotic cell cycle OBSOLETE. A cell phenotype observed in the vegetative growth phase of the life cycle in which a cell proceeds through the mitotic metaphase/anaphase transition in the presence of an uncorrected problem (such as chromosome structure or kinetochore attachment), and as a result undergoes abnormal nuclear envelope partitioning and subsequently dies. 2018-10-16T13:38:48Z