Arctinurus

Arctinurus boltoniis a large (up to 30 cm)lichidtrilobiteof the mid-Silurian.This trilobite reached about eight inches in length, though the normal adultcarapacewas about four inches. It lived in moderately deep-water in semi-tropical regions.Arctinurusfossils have been found in Europe and North America.

Arctinurus Temporal range:
Fossil ofArctinurus boltoniin theField Museum of Natural History.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Lichida
Family:	†Lichidae
Genus:	†Arctinurus Castelnau, 1843
Species:	†A. boltoni
Binomial name
†Arctinurus boltoni (Bigsby, 1825)

Arctinuruswas first reported during the construction of theErie Canalthrough soft Silurian shales and mudstones in upstate New York.Before the late 1990s, completeArctinurusfossils were very rare. The vast majority of complete specimens were commercially mined nearMiddleportNew York,USA, in a shallow quarry in theRochester Formation,and the trilobite is now relatively common in museum, university and private collections.Arctinurustended to haveepibiontsattached to the carapace.

References

• Whiteley, Thomas E; Kloc, Gerald J; Brett, Carleton E (2003).Trilobites of New York: An Illustrated Guide.Rochester: University of Rochester Press.ISBN9780801439698.
• Ludvigsen, Rolf (1982).Fossils of Ontario. Part 1: The Trilobites.Toronto:Royal Ontario Museum.ISBN9780888542212.