Phyllocarida is a subclass of crustaceans, comprising the extant order Leptostraca and the extinct orders Hymenostraca and Archaeostraca. This clade of marine crustaceans diversified extensively during the Ordovician.
left|thumb|Undescribed fossil of a very large phyllocarid from the [[Yukon (Devonian)]]
See also
- Arenosicaris
- Ceratiocaris
- Cinerocaris
- Vladicaris