Main Page | See live article | Alphabetical index The Trilobitomorpha are a subphylum of arthropods, including the trilobites. Originally a variety of peculiar forms, mostly from the lower Cambrian, were included as a class Trilobitoida. However these do not appear to be closely related to the trilobites or to each other, and are now generally placed in separate subphyla when given definite classifications at all. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.