Cyrtonellida

Cyrtonellida Temporal range: Cambrian–Devonian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Monoplacophora
Subclass:	Tergomya
Order:	†Cyrtonellida Horny, 1963[2]

Cyrtonellida is a group of "monoplacophora", representing either a sister taxon to, or a polyphyletic assemblage including, the Trybliida.