Classification of the genus Cystostroma
G. †Cystostroma Galloway and St Jean 1957
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†Cystostroma estoniense Nestor 1964
†Cystostroma primordia Jeon et al. 2018
†Cystostroma prodigiosum Antropova 2007
†Cystostroma vermontense Galloway and St Jean 1957