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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Spiriferida - Spiriferellidae
It was Spirifer (Spiriferella) by Reed (1944); it was reranked as Spiriferella by Sepkoski (2002), Shen et al. (2003) and Williams et al. (2006).
It was assigned to Spiriferina by Tschernyschew (1902); to Spirifer by Reed (1944); to Spiriferida by Sepkoski (2002); and to Spiriferellidae by Shen et al. (2003) and Williams et al. (2006).
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.