''Megalaspides'' is an
extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
genus from a well-known class of
fossil marine
arthropods, the
trilobites. It lived during the later part of the
Arenig stage of the
Ordovician Period,
approximately 478 to 471 million years ago.
References
Asaphida genera
Asaphidae
Ordovician trilobites
Trilobites of Asia
Trilobites of Europe
Trilobites of North America
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