Eastern Tornillo Flat: Torrejonian, Texas
collected by J. Wilson, M. McKenna, G. Whitaker 1952, 1962–1963

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Multituberculata - Neoplagiaulacidae
Parectypodus sloani Schiebout 1974
Schiebout 1974
Ectypodus musculus Matthew and Granger 1921
Schiebout 1974
Mesodma cf. pygmaea Sloan 1987
Krause 1977
Mimetodon silberlingi (Simpson 1935)
Schiebout 1974
Mammalia - Multituberculata - Ptilodontidae
cf. Mimetodon douglassi (Simpson 1935)
1 specimen
BEG 40147-15
    = Neoplagiaulax douglassi Simpson 1935
Schiebout 1974
recombined as Baiotomeus douglassi
Ptilodus mediaevus Cope 1881
Schiebout 1974
(1 measurement)
Mammalia
Psittacotherium cf. multifragum Cope 1882
5 specimens
BEG 40147-2, 3, 3a, 3b, 7
    = Psittacotherium multifragum Cope 1882
Schoch 1986
Mammalia - Mixodectidae
Mixodectes malaris (Cope 1884)
Williamson 1996
Mammalia - Primates
Palaechthon cf. woodi Gazin 1971
Williamson 1996
apparently "Navajovius kohlhaasae"
Mammalia - Periptychidae
Periptychus carinidens Cope 1881
3 specimens
BEG 40417-4, 17
    = Periptychus superstes Matthew 1935
Schiebout 1974
    = Periptychus sp. Cope 1881
Williamson and Lucas 1993
probably a new species according to Williamson 1996
Mammalia - Phenacodontidae
? Tetraclaenodon puercensis (Cope 1881)
3 specimens
BEG 40147-19
    = Phenacodus cf. matthewi Simpson 1935
Schiebout 1974
    = Phenacodus bisonensis Gazin 1956
Thewissen 1990
probably "Tetraclaenodon puercensis" of Williamson 1996, which seems to be repeated from Schiebout 1986
Mammalia - Condylarthra - Chriacidae
Prothryptacodon sp. Simpson 1935
Williamson 1996
see common names

Geography
Country:United States State/province:Texas County:Brewster
Coordinates: 29.4° North, 103.1° West (view map)
Paleocoordinates:35.3° North, 84.7° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Paleocene
Stage:Danian 10 m.y. bin:Cenozoic 1
*Period:Tertiary
Key time interval:Torrejonian
Age range of interval:63.30000 - 61.70000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Tornillo Formation:Black Peaks
Local section:BPeak Local bed:3
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: 140 ft above base of formation; Torrejonian based on Leslie et al. (2018)
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:TMM
Collectors:J. Wilson, M. McKenna, G. Whitaker Collection dates:1952, 1962–1963
Taxonomic list comments:43 m level of Fm.
new records of Williamson 1996 were described by Schiebout 1986 (Ph.D. thesis)
Metadata
Also known as:T2; TMM 40147; Middle Peak; Alligator Alley
Database number:14948
Authorizer:J. Alroy, M. Carrano Enterer:J. Alroy, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2022-06-30 09:46:46
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

68428. J. A. Wilson. 1967. Early Tertiary mammals. In R. A. Maxwell, J. T. Lonsdale, R. T. Hazzard, & J. A. Wilson (eds.), Geology of Big Bend National Park, Brewster County, Texas. The University of Texas Publication 6711:157-169 [M. Carrano/M. Carrano]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
2155 D. W. Krause. 1977. Paleocene Multituberculates (Mammalia) of the Roche Percée Local Fauna, Ravenscrag Formation, Saskatchewan, Canada. Palaeontographica Abteilung A 159:1-36 [J. Alroy/J. Alroy/M. Uhen]
82038 T. M. Lehman, S. L. Wick, H. L. Beatty, W. R. Straight, and J. R. Wagner. 2018. Stratigraphy and depositional history of the Tornillo Group (Upper Cretaceous–Eocene) of West Texas. Geosphere 14(5):2206-2244 [M. Carrano/M. Carrano]
3024 J. A. Schiebout. 1974. Vertebrate paleontology and paleoecology of Paleocene Black Peaks Formation, Big Bend National Park, Texas. Texas Memorial Museum Bulletin 24:1-88 [J. Alroy/J. Alroy/M. Uhen]
3053 R. M. Schoch. 1986. Systematics, Functional Morphology and Macroevolution of the Extinct Mammalian Order Taeniodonta. Peabody Museum of Natural History Bulletin 42:1-320 [J. Alroy/J. Alroy/M. Uhen]
3401 J. G. M. Thewissen. 1990. Evolution of Paleocene and Eocene Phenacodontidae (Mammalia, Condylarthra). University of Michigan Papers on Paleontology 29:1-107 [J. Alroy/J. Alroy/P. Mannion]
3646 T. E. Williamson. 1996. The beginning of the age of mammals in the San Juan Basin, New Mexico; biostratigraphy and evolution of Paleocene mammals of the Nacimiento Formation. New Mexico Museum of Natural History and Science Bulletin 8:1-141 [J. Alroy/J. Alroy/P. Mannion]
3649 T. E. Williamson and S. G. Lucas. 1993. Paleocene vertebrate paleontology of the San Juan Basin, New Mexico. New Mexico Museum of Natural History Bulletin 2:105-136 [J. Alroy/J. Alroy/M. Uhen]