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    Isthmocystis
                    | Isthmocystis | |
| Duxbury, S. (1979a) | |
| Stover, L.E. and Williams, G.L. (1987) | |
| Active | |
| Subfamily Gonyaulacaceae/Uncertain | |
| distincta | |
| 145 | |
| 129 | |
| 
                                                            No synonyms
                                                     | |
| 
                                                            No synonyms
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