Also known as Pteraichnus holotype, Stokes Locality

Where: Apache County, Arizona (36.9° N, 109.1° W: paleocoordinates 33.0° N, 56.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Salt Wash Member (Morrison Formation), Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• Originally identified as Morrison Formation; later (Lockley et al. 1995) suggested to be more likely from the Summerville Formation. Lockley & Mickelson (1997) noted that Pteraichnus is normally known from levels below the Morrison, but that the original stratigraphic interpretation (of lowermost Salt Wash Member, Morrison) may be correct for the type locality only.

• bed-level stratigraphic resolution

Environment/lithology: levee; medium-grained, brown, gray sandstone and mudstone

Size class: macrofossils

Preservation: trace

Collected by W. L. Stokes in 1952

Collection methods: quarrying, surface (in situ),

• University of Utah collections

Primary reference: W. L. Stokes. 1957. Pterodactyl tracks from the Morrison Formation. Journal of Paleontology 31:952-954 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 94678: authorized by Richard Butler, entered by Richard Butler on 09.03.2010

Creative Commons license: CC BY (attribution)