''Macrogrammus'' 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 early part of the
Arenig stage of the
Ordovician Period,
a
faunal stage which lasted from approximately 478 to 471 million years ago. Its fossil name is ''Macrogrammus scylfense Whittard'' named after its British Collector WF Whittard in 1966''.''
References
Pilekiidae
Phacopida genera
Ordovician trilobites of South America
Ordovician trilobites of Europe
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