Classification of the subgenus Thyrsocyrtis (Pentalacorys)
Subg. †Thyrsocyrtis (Pentalacorys) Haeckel 1882
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†Thyrsocyrtis (Pentalacorys) tensa Foreman 1973
†Thyrsocyrtis (Pentalacorys) triacantha Ehrenberg 1873
Classification of the subgenus Thyrsocyrtis (Pentalacorys)