Arctinurus

Arctinurus boltoni is a large (up to 30 cm) lichid trilobite of the mid-Silurian. This trilobite reached about eight inches in length, though the normal adult carapace was about four inches. It lived in moderately deep-water in semi-tropical regions. Arctinurus fossils have been found in Europe and North America.

Arctinurus Temporal range: Wenlock–Ludlow PreꞒ Ꞓ O S D C P T J K Pg N
Fossil of Arctinurus boltoni in the Field 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)

Arctinurus was first reported during the construction of the Erie Canal through soft Silurian shales and mudstones in upstate New York.^[1] Before the late 1990s, complete Arctinurus fossils were very rare. The vast majority of complete specimens were commercially mined near Middleport New York, USA, in a shallow quarry in the Rochester Formation, and the trilobite is now relatively common in museum, university and private collections. Arctinurus tended to have epibionts attached to the carapace.

References

1. Bigsby, John Jeremiah (1825). "Description of a New Species of Trilobite". Journal of the Academy of Natural Sciences of Philadelphia. 4 (2). Philadelphia: Academy of Natural Sciences of Philadelphia: 365–368 – via Biodiversity Heritage Library.

• Whiteley, Thomas E; Kloc, Gerald J; Brett, Carleton E (2003). Trilobites of New York: An Illustrated Guide. Rochester: University of Rochester Press. ISBN 9780801439698.
• Ludvigsen, Rolf (1982). Fossils of Ontario. Part 1: The Trilobites. Toronto: Royal Ontario Museum. ISBN 9780888542212.