Talk:Chinle Formation

message: Here are the updates to Weishampel et. al.
CHINLE FORMATION/PETRIFIED FOREST FORMATION (ARIZONA):
1. "Coelophysis bauri" as listed for Arizona is now Coelophysis sp. (Nesbitt et. al., 2007)
2. Prosauropoda indet. (=?Anchisauridae indet.) is based on a proximal femur (UCMP 139487) that Hunt et. al. (1998) reidentify as non-dinosaurian. There are thus no confirmed body fossils of prosauropods from the Late Triassic of North America.
3. Revueltosaurus callenderi is a valid taxon of pseudosuchian(Parker et. al., 2005).
CHINLE FORMATION/BLUEWATER CREEK FORMATION (ARIZONA):
1. Tecovasaurus murryi has been relegated to Archosauriformes incertae sedis, but remains a valid genus (Irmis et. al., 2007)
CHINLE FORMATION/SANTA ROSA FORMATION (NEW MEXICO):
1. Theropoda indet. is based on NMMNH P-13006, NMMMNH P-25749, and NMMNH P-25790, now Archosauria indet. (Nesbitt et. al., 2007)
2. Undescribed ornithischian is now Krzyzanowskisaurus Heckert, 2005
CHINLE FORMATION/GARITA CREEK FORMATION (NEW MEXICO):
1. Theropoda indet. is based on indeterminate pes and caudal centra reported by Hunt et. al. (1998).
CHINLE FORMATION/BLUEWATER CREEK FORMATION (NEW MEXICO):
1. Theropoda indet. is based on two specimens (NMMNH P-18400, NMMNH P-18401)(=Cinizasaurus hunti Heckert, 1997), now Archosauriformes indet. (Nesbitt et. al., 2007).
2. Tecovasaurus murryi is a valid taxon assignable to Archosauriformes incertae sedis.(Irmis et. al., 2007).
3. "Ornithischian tracks" are indistinguishable from Grallator tracks (see Nesbitt et. al., 2007)
Eucoelophysis baldwini remains a valid genus, but is not a coelophysoid theropod (Ezcurra, 2006; Nesbitt et. al., 2007). Therefore, there is no justification for considering Eucooelophysis invalid, 'contra' Weishampel et. al.
Hunt and Lucas (1991) failed to go far enough in their paper to determine the taxonomic status of specimens referred to Coelophysis, despite considering C. bauri, C. longicollis, and C. willistoni to be 'nomina dubia'. A re-description of these taxa is needed to determine their systematic position.
Under Bull Canyon Formation, "Herrerasauridae indet." is based on NMMNH P-4569 (=Comanchesaurus kuesi Hunt, 1994), while "Ceratosauria indet." refers to NMMNH P-17375 (=Cryptoraptor lockleyi Hunt, 1994). The faunal list under Cooper canyon formation remains the same.   
Ezcurra, M.D., 2006. A review of the systematic position of the dinosauriform archosaur Eucoelophysis baldwini Sullivan & Lucas, 1999 from the Upper Triassic of New Mexico, USA. Geodiversitas, 28(4):649-684. 
Hunt, Adrian P. 1994. Vertebrate paleontology and biostratigraphy of the Bull Canyon Formation (Chinle Group, Upper Triassic), east-central New Mexico with revisions of the families Metoposauridae (Amphibia: Temnospondyli) and Parasuchidae (Reptilia:Archosauria). Unpublished PhD Dissertation, University of New Mexico, Albuquerque, 404 pp.
Hunt, Adrian P. 2001. The vertebrate fauna, biostratigraphy, and biochronology of the type Revueltian land-vertebrate-faunachron, Bull Canyon Formation (Upper Triassic), east central New Mexico. pp. 123-151 in Spencer G. Lucas and Dana Ulmer-Scholle (eds.), Geology of Llano Estacado, New Mexico Geological Society Guidebook 52.
Hunt, A.P. and Lucas, S.G., 1991. Rioarribasaurus, a new name for a Late Triassic dinosaur from New Mexico (USA). Paläontologische Zeitschrift 65 (1/2), 191-198. 
Hunt, Adrian P., Spencer G. Lucas, Andrew B. Heckert, Robert M. Sullivan and Martin G. Lockley. 1998. Late Triassic dinosaurs from the western United States. Geobios 31:511-531.
Irmis, Randall B., William G. Parker, Sterling J. Nesbitt, and Jun Liu. 2007. Early ornithischian dinosaurs: the Triassic record. Historical Biology 19(1):3-22.
Long, R. A. & P. A. Murry, 1995. Late Triassic (Carnian and Norian) Tetrapods from the Southwestern United States. New Mexico Museum of Natural History & Science. Bull. 4. 254 pp.
Nesbitt, Sterling J., Randall B. Irmis, and William G. Parker. 2007. A critical reevaluation of the Late Triassic dinosaur taxa of North America. Journal of Systematic Palaeontology 5(2):209-243.
Parker, William G., Randall B. Irmis, Stirling J. Nesbitt, Jeffrey W. Martz and Lori S. Browne. 2005. The Late Triassic pseudosuchian Revueltosaurus callenderi and its implications for the diversity of early ornithischian dinosaurs. Proceedings of the Royal Society, Series B 272:963-969.  —Preceding unsigned comment added by 68.4.61.237 (talk) 02:19, 23 December 2008 (UTC)
thread_title:  Updates to Weishampel et. al.