Classification of the subgenus Petricola (Petricoxenica)
Subg. †Petricola (Petricoxenica) Vokes 1976
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†Petricola (Petricoxenica) concoralla Vokes 1976
†Petricola (Petricoxenica) hoerleae Vokes 1976
Classification of the subgenus Petricola (Petricoxenica)