''Myttonia'' 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 of trilobites in the family

Trinucleidae Trinucleidae is a family of small to average size asaphida, asaphid trilobites that first occurred at the start of the Ordovician and became extinct at the end of that Period (geology), period. It contains approximately 227 species divided over 5 ...

. The genus 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.

References

Trinucleidae Asaphida genera Ordovician trilobites Ordovician trilobites of Europe {{Asaphida-stub