Trilobitomorpha
From Wikipedia, the free encyclopedia
| Trilobitomorpha Fossil range: Early Cambrian - Late Permian |
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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. The Trilobite was a primarily water based arthropod; it is one of the only species of water animal that can fully shed it shell, and is the only species of animal that can regrow its eyeballs.
