Trilobitomorpha Fossil range: Early Cambrian - Late Permian
Asaphus kowalewskii
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Trilobitomorpha
Classes
Trilobita

The Trilobitomorpha ("three-lobed forms") is a subphylum of the phylum Arthropoda that includes the trilobites. Originally a variety of peculiar forms, mostly from the lower Cambrian, were included as the Class Trilobitoidea. However, the many species—known only from fossils—do not appear to be closely related to the trilobites or, in many cases, to each other either, and are now generally placed in separate subphyla when classified at all.

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