Also known as Geronimo Quarry
Where: Navajo County, Arizona (34.9° N, 110.3° W: paleocoordinates 3.2° N, 38.8° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Holbrook Member (Moenkopi Formation), Aegean to Aegean (247.2 - 242.0 Ma)
• "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
• bed-level stratigraphic resolution
Environment/lithology: fine channel fill; concretionary, nodular, green, red, sandy siltstone
Size classes: macrofossils, mesofossils
Preservation: charcoalification
Collected by S. Welles in 1939, 1940; reposited in the UCMP
Collection methods: quarrying, surface (in situ), mechanical,
Primary reference: 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]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 34888: authorized by John Alroy, entered by Erin Leckey on 09.10.2003, edited by Richard Butler
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
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Polypodiopsida | |
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Chondrichthyes | |
"Leiacanthus sp." = Hybodus
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Osteichthyes | |
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Coelacanthimorpha | |
Moenkopia wellesi n. gen. n. sp.3
Moenkopia wellesi n. gen. n. sp.3 Schaeffer and Gregory 1961 coelacanth 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.
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Amphibia | |
Rhadalognathus boweni n. gen. n. sp.
Rhadalognathus boweni n. gen. n. sp. Welles 1947 tetrapod UCMP 36221, anterior half of left mandibular ramus. Numerous other fragments
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"Cyclotosaurus randalli n. sp." = Eocyclotosaurus randalli, Eocyclotosaurus wellesi n. sp.4, "Taphrognathus bradyi n. gen. n. sp." = Hadrokkosaurus bradyi
"Cyclotosaurus randalli n. sp." = Eocyclotosaurus randalli Welles 1947 tetrapod UCMP 36188 (holotype), skull roof. UCMP 36189, 36190, partial skulls. Numerous additional skull, jaw and skeletal elements
Eocyclotosaurus wellesi n. sp.4 Schoch 2000 tetrapod UCMP 42841 (holotype), skull. UCMP 36220, postglenoid area
"Taphrognathus bradyi n. gen. n. sp." = Hadrokkosaurus bradyi Welles 1947 tetrapod UCMP 36199 (holotype), mandibular ramus
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Vigilius wellesi5 Warren and Marsicano 2000 tetrapod 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
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Reptilia | |
Reptilia indet. Laurenti 1768 reptile At least 50 elements, some of which may belong to Arizonasaurus and/or Anisodontosaurus.
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Chirotherium sp. Kaup 1835 archosaur | |
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Arizonasaurus babbitti n. gen. n. sp.
Arizonasaurus babbitti n. gen. n. sp. Welles 1947 archosaur UCMP 36232, anterior of left maxilla. UCMP 36233, 37815, ilia, UCMP 37812, 37818, vertebrae, UCMP 37803, femur
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Anisodontosaurus greeri n. gen. n. sp.
Anisodontosaurus greeri n. gen. n. sp. Welles 1947 crown diapsid UCMP 37804, left mandible with teeth
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