Classification of the genus Thecosiphonia

Subg. †Polyierea (Thecosiphonia) Zittel 1878
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Thecosiphonia gracilis Hurcewicz 1966
Thecosiphonia postumus Schrammen 1910
Thecosiphonia ramosa Schrammen 1910
Thecosiphonia torgeri Schrammen 1910