MNA 791, Ward Terrace (Triassic of the United States)

Where: Coconino County, Arizona (35.8° N, 111.2° W: paleocoordinates 11.7° N, 49.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Owl Rock Member (Chinle Formation), Norian (228.0 - 208.5 Ma)

• Kent et al. 2019: Owl Rock Member surrounds poorly defined Norian-Rhaetian boundary. Kent et al. 2019 state the boundary falls within magnetozone PF1r which corresponds to chron polarity E17 which is approximately 209.5Ma.

• member-level stratigraphic resolution

Environment/lithology: "channel"; lithology not reported

• "proximal floodbasin" in a distributary channel

Size class: mesofossils

Collection methods: quarrying, surface (float), mechanical,

Primary reference: R. E. Kirby. 1991. A vertebrate fauna from the Upper Triassic Owl Rock Member of the Chinle Formation in Northern Arizona, Northern Arizona University. 1-476 [R. Butler/R. Butler]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 48423: authorized by Matthew Carrano, entered by Matthew Carrano on 18.03.2005, edited by Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

Gnathostomata
  -
Osteichthyes "Morphotype A" bony fish
"Ichthyolith Morphotype A"; MNA V7051, isolated denticles
Reptilia
 Eosuchia - Sphenodontidae
Sphenodontidae indet. Cope 1871 lepidosaur
MNA V7056, partial dentary. MNA 7057, partial premaxilla
 Diapsida -
Archosauriformes indet.1 Gauthier 1986 archosauromorph
MNA V7253-7260, teeth
 Theropoda -
Theropoda indet.2 theropod
MNA V7238, ungual
 Pseudosuchia - Stagonolepididae
Typothorax coccinarum Cope 1875 aetosaur
MNA V6711, dermal armor fragments
 Loricata - Sphenosuchidae
? Sphenosuchidae indet. Huene 1922 crocodilian
 Pseudosuchia - Shuvosauridae
"cf. Chatterjeea sp." = Shuvosaurus2
"cf. Chatterjeea sp." = Shuvosaurus2 Chatterjee 1993 archosaur
MNA V5598, partial mandible. MNA V5597, partial surangular-prearticular complex. MNA V5608, associated dsarticulated teeth. MNA V6726, distal femur. MNA V5599, partial tibia
 Phytosauria - Parasuchidae
"Pseudopalatus buceros" = Machaeroprosopus buceros4
"Pseudopalatus buceros" = Machaeroprosopus buceros4 Cope 1881 archosaur
 Rhynchosauria - Rhynchosauridae
Amphibia
 Temnospondyli - Metoposauridae
Metoposauridae indet.4 Watson 1919 tetrapod
MNA 5571, 5582, V7052-7055, cranial fragments. MNA 5573, 5572, pectoral girdle fragments
Metoposauridae indet.4 Watson 1919 tetrapod
Actinopteri
 Semionotiformes - Semionotidae
cf. Semionotus sp. Agassiz 1832
 Perleidiformes - Perleididae
Perleididae indet. Brough 1931
Osteichthyes
 Palaeonisciformes - Palaeoniscidae
Turseodus cf. dolorensis Schaeffer 1967
 Palaeonisciformes - Redfieldiidae
Redfieldiidae indet. Hutchinson 1973
Scales catalogued under MNA V6957-6995 (some from another locality)
Chondrichthyes
 Hybodontiformes - Acrodontidae
Reticulodus synergus n. gen. n. sp.3
Reticulodus synergus n. gen. n. sp.3 Murry and Kirby 2002 elasmobranch
Bivalvia
 Unionida - Unionidae
Unio sp. Philipsson 1788 freshwater mussel
MNA N9283, valve fragment
Equisetopsida
 Pinidae - Pinidae
Araucarioxylon sp. Kraus 1870