Classification of the genus Thecosiphonia
Subg. †Polyierea (Thecosiphonia) Zittel 1878
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†Thecosiphonia gracilis Hurcewicz 1966
†Thecosiphonia neoburgensis Wagner 1963
†Thecosiphonia postumus Schrammen 1910
†Thecosiphonia ramosa Schrammen 1910
†Thecosiphonia torgeri Schrammen 1910