|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Rhynchonellata - Spiriferida - Trigonotretidae
It was reranked as Spirifer (Trigonotreta) by Meek (1877).
It was assigned to Spirifer by Meek (1877); to Spiriferida by Sepkoski (2002); and to Trigonotretinae by Williams et al. (2006).
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