Krzyzanowski Bonebed, NMMNH L-3764 (Triassic of the United States)

Also known as Blue Hills

Where: Arizona (34.5° N, 109.4° W: paleocoordinates 10.1° N, 48.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; concretionary, pebbly, sideritic, brown, gray, white conglomerate and red, blue mudstone

• "a thin (6-8-cm thick), well-rounded, very light gray to bluish white clay pebble conglomerate overlain by 75-80 cm of highly smectitic, purple mudstone that is heavily color mottled to various shades of gray and white. Thin sheets of dark brownish gray to greenish gray sideritic concretions cover many of the bones."

Size classes: macrofossils, mesofossils

Reposited in the NMMNH

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

Primary reference: A. B. Heckert. 2004. Late Triassic microvertebrates from the lower Chinle Group (Otischalkian-Adamanian: Carnian), southwestern U.S.A. New Mexico Museum of Natural History and Science Bulletin 27:1-170 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 22705: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 29.05.2001, edited by Matthew Carrano and Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopterygii indet. ray-finned fish
NMMNH P-34088
 Dipnoi - Arganodontidae
Arganodus sp. Martin 1979 lungfish
 Temnospondyli - Metoposauridae
Apachesaurus sp., "Buettneria sp." = Koskinonodon
Apachesaurus sp. Hunt 1993 tetrapod
"Buettneria sp." = Koskinonodon Branson and Mehl 1929 tetrapod
NMMNH P-34086-87; also listed as Metoposauridae indet.
Reptilia indet. Laurenti 1768 reptile
NMMNH P-34561-34650
 Eosuchia -
Archosauromorpha indet. archosauromorph
Archosauriformes "indet. L" Gauthier 1986 archosauromorph
NMMNH P-34096
? Archosauriformes "indet. H" Gauthier 1986 archosauromorph
NMMNH P-34091-92
Archosauriformes indet. Gauthier 1986 archosauromorph
 Dinosauria -
Dinosauria indet. dinosaur
NMMNH P-34627; pubis
 Theropoda -
Theropoda indet. theropod
NMMNH P-34620-39, 34640
 Ornithischia -
? Ornithischia indet. ornithischian
NMMNH P-34095, 34090
 Pseudosuchia - Stagonolepididae
Stagonolepis sp. Agassiz 1844 archosaur
Desmatosuchus sp. Case 1920 archosaur
 Loricata -
 Pseudosuchia -
Poposaurus gracilis Mehl 1915 archosaur
 Phytosauria - Parasuchidae
aff. Rutiodon sp., "Phytosauridae indet." = Mystriosuchinae
aff. Rutiodon sp. Emmons 1856 archosaur
NMMNH P-34098
"Phytosauridae indet." = Mystriosuchinae von Huene 1915 archosaur
NMMNH P-34081-85, 34097