|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Cephalopoda - Ceratitida - Trachyceratidae
It was reranked as Trachyceras (Protrachyceras) by Smith (1904).
It was assigned to Trachyceras by Smith (1904); to Trachyceratidae by Spath (1951); to Ceratitida by Sepkoski (2002); and to Protrachyceratinae by Tozer (1981), Brack and Rieber (1993), Tozer (1994) and Urlichs (2017).
Is something missing? Join the Paleobiology Database and enter the data
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.