|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Anthozoa - Stauriida - Petalaxidae
It was reranked as Lithostrotion (Lithostrotionella) by Easton (1960).
It was assigned to Lonsdaleiinae by Hill (1956); to Lithostrotion by Easton (1960); to Petalaxidae by Hill (1981); and to Rugosa by Sepkoski (2002).
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.