List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
|
||||||||||
Plantae indet.
Haeckel 1866
|
||||||||||
carbonized remains | ||||||||||
Polypodiopsida
- Equisetales
- Calamitaceae
|
||||||||||
Calamites sp. wood
Suckow 1784
|
||||||||||
casts | ||||||||||
Ptycholepiformes
- Ptycholepididae
|
||||||||||
? Boreosomus sp.
Stensiö 1921
|
1 specimen | |||||||||
ganoid scales | ||||||||||
Coelacanthimorpha
- Coelacanthiformes
- Coelacanthidae
|
||||||||||
Moenkopia wellesi n. gen., n. sp.
Schaeffer and Gregory 1961
|
Schaeffer and Gregory 1961 | 13 elements | ||||||||
UCMP 36193, complete basisphenoid (holotype). UCMP 37801, 36234, 36197, basisphenoids. UCMP 56228, parasphenoid. UCMP 37788, 37789, 37790, 37793, pterygoids. UCMP 37791, quadrate. UCMP 56078, ceratohyal. UCMP 73805, 73806, cleithra. | ||||||||||
Amphibia
- Temnospondyli
- Heylerosauridae
|
||||||||||
Rhadalognathus boweni n. gen., n. sp.
Welles 1947
|
||||||||||
UCMP 36221, anterior half of left mandibular ramus. Numerous other fragments | ||||||||||
Amphibia
- Temnospondyli
|
||||||||||
Eocyclotosaurus wellesi n. sp.
Schoch 2000
|
Schoch 2000 | 2 specimens | ||||||||
UCMP 42841 (holotype), skull. UCMP 36220, postglenoid area | ||||||||||
Cyclotosaurus randalli n. sp.
Welles 1947
|
||||||||||
UCMP 36188 (holotype), skull roof. UCMP 36189, 36190, partial skulls. Numerous additional skull, jaw and skeletal elements | ||||||||||
Taphrognathus bradyi n. gen., n. sp.
Welles 1947
|
||||||||||
UCMP 36199 (holotype), mandibular ramus | ||||||||||
Amphibia
- Temnospondyli
- Brachyopidae
|
||||||||||
Vigilius wellesi
Warren and Marsicano 2000
|
Warren and Marsicano 2000 | 15 specimens | ||||||||
UCMP 36205, 36247, 36836, 37771, 75431, 75432, 75433, 75435, 76477, 76478, 76479, isolated skull fragments; UCMP 36205, mandible; UCMP 80855, atlas; UCMP 36841, clavicle; UCMP 37770, humerus | ||||||||||
Reptilia
|
||||||||||
Reptilia indet.
Laurenti 1768
|
50 elements | |||||||||
At least 50 elements, some of which may belong to Arizonasaurus and/or Anisodontosaurus. | ||||||||||
? Arizonasaurus babbitti
Welles 1947
|
1 specimen | |||||||||
UCMP 36231, partial maxilla | ||||||||||
= Archosauria indet.
Cope 1869
|
Nesbitt 2005 | |||||||||
Reptilia
- Chirotheriidae
|
||||||||||
Chirotherium sp.
Kaup 1835
|
||||||||||
Reptilia
|
||||||||||
Poposauroidea informal unnamed species
|
Nesbitt 2005 | |||||||||
"Chatterjeea-like taxon" | ||||||||||
Arizonasaurus babbitti n. gen., n. sp.
Welles 1947
|
6 specimens | |||||||||
UCMP 36232, anterior of left maxilla. UCMP 36233, 37815, ilia, UCMP 37812, 37818, vertebrae, UCMP 37803, femur | ||||||||||
Anisodontosaurus greeri n. gen., n. sp.
Welles 1947
|
1 specimen | |||||||||
UCMP 37804, left mandible with teeth | ||||||||||
Chondrichthyes
- Hybodontiformes
- Hybodontidae
|
||||||||||
Leiacanthus sp.
Agassiz 1837
|
32 elements | |||||||||
spines | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Arizona | County: | Navajo |
Coordinates: | 34.9° North, 110.3° West (view map) | ||||
Paleocoordinates: | 3.2° North, 38.8° West | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | outcrop |
Stratigraphy
Formation: | Moenkopi | Member: | Holbrook | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: "In the Holbrook Member beneath the 'upper massive sandstone' that caps the Holbrook Member" 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 |
Lithology and environment
Primary lithology: | concretionary,nodular,green,red sandy siltstone |
Includes fossils? | Y |
Lithology description: "Channel deposit of greenish, limy silt and sand with included lumps of chocolate shale and small greenish lime nodules with gray centres. Bone as waterworn fragments in matrix" | |
Environment: | fine channel fill |
Taphonomy
Modes of preservation: | body,charcoalification |
Size of fossils: | macrofossils,mesofossils |
Disassociated major elements: | some |
Disassociated minor elements: | many |
Spatial resolution: | allochthonous |
Collection methods and comments
Collection methods: | selective quarrying,surface (in situ),mechanical,field collection | ||
Reason for describing collection: | taxonomic analysis | ||
Museum repositories: | UCMP | ||
Collectors: | S. Welles | Collection dates: | 1939, 1940 |
Metadata
Also known as: | Geronimo Quarry | ||
Database number: | 34888 | ||
Authorizer: | J. Alroy, R. Butler | Enterer: | E. Leckey, R. Butler |
Modifier: | R. Butler | Research group: | vertebrate |
Created: | 2003-10-09 14:27:51 | Last modified: | 2012-10-25 03:29:16 |
Access level: | the public | Released: | 2003-10-09 14:27:51 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
9311. | 5% 45940 | S. P. Welles. 1947. Vertebrates from the Upper Moenkopi Formation of northern Arizona. University of California Publications in Geological Sciences 27(7):241-294 [J. Alroy/E. Leckey/E. Leckey] |
Secondary references:
32399 | S. G. Lucas and R. R. Schoch. 2002. Triassic temnospondyl biostratigraphy, biochronology and correlation of the German Bundsandstein and North American Moenkopi Formation. Lethaia 35:97-106 [R. Butler/R. Butler] | |
32383 | M. Morales. 1987. Terrestrial fauna and fauna from the Triassic Moenkopi Formation of the southwestern United States. Journal of the Arizona-Nevada Academy of Science 22:1-19 [R. Butler/R. Butler] | |
32384 | S. J. Nesbitt. 2005. The tetrapod fauna of the Moenkopi Formation in northern Arizona. In S. J. Nesbitt, W. G. Parker, R. B. Irmis (eds.), Guidebook to the Triassic Formations of the Colorado Plateau in northern Arizona, Mesa Southwest Museum Bulletin 9:25-32 [R. Butler/R. Butler] | |
32386 | S. J. Nesbitt. 2005. Osteology of the Middle Triassic pseudosuchian archosaur Arizonasaurus babbitti. Historical Biology 17:19-47 [R. Butler/R. Butler] | |
32378 | S. J. Nesbitt. 2005. The Moenkopi Formation along the Little Colorado River in eastern Arizona. In S. J. Nesbitt, W. G. Parker, R. B. Irmis (eds.), Guidebook to the Triassic Formations of the Colorado Plateau in northern Arizona, Mesa Southwest Museum Bulletin 9:13-23 [R. Butler/R. Butler] | |
32392 | S. J. Nesbitt. 2005. A new archosaur from the upper Moenkopi Formation (Middle Triassic) of Arizona and its implications for rauisuchian phylogeny and diversification. Neues Jahrbuch für Geologie und Paläontologie Monatshefte 2005(6):332-346 [R. Butler/R. Butler] | |
43345 | B. Schaeffer and J. T. Gregory. 1961. Coelacanth fishes from the continental Triassic of the western United States. American Museum Novitates 2036:1-18 [R. Butler/R. Butler] | |
32381 | R. R. Schoch. 2000. The status and osteology of two new cyclotosaurid amphibians from the Upper Moenkopi Formation of Arizona (Amphibia: Temnospondyli; Middle Triassic). Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 216(3):387-411 [R. Butler/R. Butler] | |
32401 | A. Warren and C. Marsicano. 2000. A phylogeny of the Brachyopoidea (Temnospondyli, Stereospondyli). Journal of Vertebrate Paleontology 20:462-483 [R. Butler/R. Butler] | |
32390 | S. P. Welles. 1969. Collecting Triassic vertebrates in the Plateau Province. Journal of the West 8(2):231-246 [R. Butler/R. Butler] |