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Peraspis fauna, Road River Fm., Llanvirn, Yukon Territory, Canada (Ordovician of Canada)

Where: Yukon, Canada (62.8° N, 136.6° W: paleocoordinates 17.2° N, 76.5° W)

• coordinate based on political unit

When: Road River Formation, Llanvirn (466.0 - 460.9 Ma)

Environment/lithology: slope; black, argillaceous lime mudstone

• "black argillaceous lime mudstone and shales"

Primary reference: J. J. Sepkoski Jr. 1998. Rates of speciation in the fossil record. Philosophical Transaction of the Royal Society Biological Sciences 353(1366):315-326 [J. Sepkoski/M. Sommers/A. Clement] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 302: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998