Billings Gap area, PFV 396 (Triassic of the United States)

Where: Apache County, Arizona (34.9° N, 109.8° W: paleocoordinates 10.6° N, 48.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Blue Mesa Member (Chinle Formation), Norian (228.0 - 208.5 Ma)

• "A fossiliferous light green matrix-supported siltstone in the upper Blue Mesa Member of the Chinle Formation, between 223.036 ± 0.059 and 220.123 ± 0.068 Ma (Ramezani et al. 2011)." (Kligman et al. 2018)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; siltstone

• "The “coprolite layer” is a 5–12 cm thick grey-green siltstone with abundant coprolites, osteichthyan scales, vertebrate bones, and charcoal." (Kligman et al. 2018)

Size class: macrofossils

Collected in 2007

Primary reference: B. T. Kligman, A. D. Marsh, and W. G. Parker. 2018. First records of diapsid Palacrodon from the Norian, Late Triassic Chinle Formation of Arizona, and their biogeographic implications. Acta Palaeontologica Polonica 63(1):117-127 [A. Dunhill/B. Allen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 196662: authorized by Alex Dunhill, entered by Bethany Allen on 27.09.2018, edited by Bryan Gee

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gnathostomata
  -
Sarcopterygii indet.2
Sarcopterygii indet.2 lobe-finned fish
Reptilia
 Diapsida -
Archosauromorpha indet.2
Archosauromorpha indet.2 archosauromorph
 Pseudosuchia - Stagonolepididae
Acaenasuchus geoffreyi3
Acaenasuchus geoffreyi3 Long and Murry 1995 aetosaur
PEFO 37171 (osteoderm), 37173 (osteoderm), 37181 (osteoderm), 37185 (osteoderm), 37233 (osteoderm), 37245 (osteoderm), 37323 (osteoderm), 37326 (osteoderm), 38264 (osteoderm), 38363 (osteoderm), 40000 (osteoderm)
 Diapsida - Azendohsauridae
Azendohsauridae sp.1
Azendohsauridae sp.1 Nesbitt et al. 2015 archosauromorph
 Diapsida - Trilophosauridae
? Trilophosauridae sp.1
? Trilophosauridae sp.1 Gregory 1945 archosauromorph
 Eosuchia -
Lepidosauromorpha indet.2
 Diapsida -
Palacrodon browni
Palacrodon browni Broom 1906 diapsid
PEFO 37247, fragment of right maxilla
Amphibia
 Temnospondyli -
Temnospondyli indet.2
Temnospondyli indet.2 von Zittel 1887 tetrapod
 Salientia -
Salientia indet.4
Salientia indet.4 Laurenti 1768 frogs and relatives
PEFO 41743, left ilium
Gnathostomata
  -
Actinopterygii indet.2
Actinopterygii indet.2 ray-finned fish
Osteichthyes
 Saurichthyiformes - Saurichthyidae
Saurichthys sp.2
Saurichthys sp.2 Agassiz 1834 ray-finned fish
Tooth-bearing rostral fragments from upper jaws (PEFO 37397) and lower jaws (PEFO 37394, PEFO 37378), or indeterminate upper or lower jaws (PEFO 37242, PEFO 37344, PEFO 37345, PEFO 37347, PEFO 37348, PEFO 37393, PEFO 373995)
Gnathostomata
  -
Chondrichthyes indet.2
Chondrichthyes indet.2 Huxley 1880 cartilaginous fish
1Kligman et al. 2020; 2Kligman et al. 2017; 3Marsh et al. 2020; 4Stocker et al. 2019