UCMP V3956, Penzance Station (Triassic to of the United States)

Where: Navajo County, Arizona (34.9° N, 110.2° W: paleocoordinates 3.3° N, 38.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Holbrook Member (Moenkopi Formation), Aegean to Aegean (247.2 - 242.0 Ma)

• "well above the gypsiferous middle zone of the Moenkopi" and approx. 40 m above contact with Coconino Fm.

•Lucas & Schoch (2002: Lethaia 35: 97-106) inferred the Holbrook member to be earliest Anisian (Aegean–Bithynian) in age based upon tetrapod biostratigraphy (Eocyclotosaurus used to correlate Holbrook Member to German Upper Bundsandstein) and magnetostratigraphy

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; mudstone

• "mudflat"

Size class: macrofossils

Preservation: trace

Collected by Peabody; reposited in the UCMP

Collection methods: surface (in situ),

Primary reference: F. E. Peabody. 1948. Reptile and amphibian trackways from the Lower Triassic Moenkopi formation of Arizona and Utah. University of California Publications, Bulletin of the Department of Geological Sciences 27(8):295-468 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52806: authorized by Matthew Carrano, entered by Matthew Carrano on 22.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pseudosuchia - Chirotheriidae
"Chirotherium marshalli" = Isochirotherium marshalli, "Chirotherium cf. marshalli" = Isochirotherium marshalli
"Chirotherium marshalli" = Isochirotherium marshalli Peabody 1948 archosaur
UCMP 37348-37350
"Chirotherium cf. marshalli" = Isochirotherium marshalli Peabody 1948 archosaur
not collected