
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)]]
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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
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).