Cyclida

Cyclida Temporal range: Early Carboniferous–Early Jurassic PreꞒ Ꞓ O S D C P T J K Pg N (possible Cretaceous records)
Diagram of Brittaniclus rankini (formerly Americlus rankini) in ventral view
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Superclass:	Multicrustacea
Order:	†Cyclida Schram, Vonk & Hof, 1997
Genera
See text
Synonyms
Cycloidea Glaessner, 1928

Cyclida (formerly Cycloidea, and so sometimes known as cycloids) is an extinct order of crab-like fossil arthropods that lived from the Carboniferous to the Jurassic and possibly Cretaceous. Their classification is uncertain, but they are generally interpreted as crustaceans, likely belonging to the superclass Multicrustacea.