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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Asteroidea - Tropidasteridae
It was assigned to Astropectinidae by Hess (1955); to Tropidasteridae by Spencer and Wright (1966); to Valvatida by Sepkoski (2002); and to Plumasteridae by Gale (2011).
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.