Where: Yorkshire, United Kingdom (52.7° N, 2.0° W: paleocoordinates 32.9° S, 15.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Skelgill Formation, Aeronian (439.0 - 436.0 Ma)

• sedgwickii

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); mudstone

Collection methods: This reference is a taxonomic treatment of the trilobites of England and Wales. Localities at which the fossils occur are given for each species described. It is from this information that the list was put together. I therefore do notknow how the specimins were collected.

Primary reference: N.J. Curtis and P.D. Lane. 1997. The Llandovery trilobites of England and Wales. Monograph of the Palaeontographical Society 151:1-101 [M. Patzkowsky/Z. Krug/Z. Krug] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50288: authorized by Mark Patzkowsky, entered by Zack Krug on 11.05.2005