Mason Pocket: Tiffanian, Colorado
collected by W. Granger 1916

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Theropoda - Ogygoptyngidae
Ogygoptynx wetmorei n. gen., n. sp. Rich and Bohaska 1976
Rich and Bohaska 1981
Mammalia
Peradectes elegans n. sp. Matthew and Granger 1921
(5 measurements)
Mammalia - Barylambdidae
Ignatiolambda barnesi n. gen., n. sp. Simons 1960
Simons 1960
"east of the Florida River and west of Ignacio, north of the Mesa Mountains"
Mammalia - Apatemyidae
Labidolemur soricoides n. sp. Matthew and Granger 1921
(1 measurement)
Mammalia - Procreodi - Arctocyonidae
Thryptacodon australis n. sp. Simpson 1935
(1 measurement)
Mammalia - Nyctitheriidae
Leptacodon tener n. sp. Matthew and Granger 1921
Mammalia - Primates - Carpolestidae
Carpodaptes aulacodon n. sp. Matthew and Granger 1921
(1 measurement)
Mammalia - Primates - Picrodontidae
Zanycteris paleocenus n. gen., n. sp. Matthew 1917
Mammalia - Primates - Plesiadapidae
Chiromyoides caesor Gingerich 1973
Gingerich 1973
new UCMP specimen
Nothodectes gidleyi n. gen., n. sp. Matthew 1917
Matthew 1917
(6 measurements)
    = Nannodectes gidleyi Matthew 1917
Alroy 2002
Mammalia - Primates - Paromomyidae
Phenacolemur frugivorus n. sp. (Matthew and Granger 1921)
(1 measurement)
    = Ignacius frugivorus Matthew and Granger 1921
Alroy 2002
Mammalia - Primates - Microsyopidae
Navajovius kohlhaasae n. sp. Matthew and Granger 1921
(8 measurements)
Mammalia - Macroscelidea - Apheliscidae
Utemylus latomius n. sp. Gingerich 1983
Gingerich 1983
collected in 1940 (3 measurements)
Mammalia - Leptictidae
Xenacodon mutilatus n. sp. Matthew and Granger 1921
Mammalia - Multituberculata - Ptilodontidae
Ptilodus kummae Krause 1977
Gunnell 1994
"Mason Pocket"
Mammalia - Multituberculata - Neoplagiaulacidae
Ectypodus musculus n. sp. Matthew and Granger 1921
see common names

Geography
Country:United States State/province:Colorado County:La Plata
Coordinates: 37.1° North, 107.6° West (view map)
Paleocoordinates:43.0° North, 89.4° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Paleocene
10 m.y. bin: Cenozoic 1
*Period:Tertiary
Key time interval: Tiffanian
Age range of interval: 60.9 - 56.2 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Local section:Mason Local bed:1
Local order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology:fine,shelly/skeletal,gray "shale"
Lithology description: "dark gray shale very fine in texture... full of bones and fragments" (Matthew 1917)
Environment:fissure fill
Geology comments: "it might be a fissure filling"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Collection size:70 specimens
Reason for describing collection:taxonomic analysis
Museum repositories:AMNH
Collectors:W. Granger Collection dates:1916
Taxonomic list comments:fauna known only from 1916 Granger collection
sec 20 T 33 N R 6 W
"Most other localities in the vicinity of Tiffany are stratigraphically higher than Mason Pocket": Butler et al. 1981
the "Bayfield" or "Tiffany" fauna includes many localities other than Mason Pocket such as Carracas Station and Crowbar Creek (see); additional records based on Simpson and other sources include the following: Chriacus sp., named Chriacus metocometi by Van Valen 1978 ? Dissacus sp. Phenacodus grangeri type Phenacodus matthewi type (includes type of "P. gidleyi"; see Thewissen 1990) additional Phenacodus sp. Phenacodus magnus Thewissen 1990: collected after Simpson 1935 Periptychus "superstes" type Aletodon ("Platymastus") mellon of Van Valen 1978 from 50 m above quarry: Gingerich 1983c Oxyaena sp. Gingerich 1980a from "near Tiffany"; probably the same as O. sp. from "just north of Mason Pocket" of Van Valen 1966 "Ignatiolambda barnesi" type Simons 1960: "presumed basal part of Tiffany formation, east of the Florida River and west of the Ignacio, north of the Mesa Mountains, SW 1/4, Sec. 29, R 8 W, T 34 N, La Plata County"
Metadata
Also known as:Tiffany (in part)
Database number:14967
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:J. Alroy Research group:vertebrate
Created:1993-09-27 00:00:00 Last modified:2009-04-03 22:00:23
Access level:the public Released:1993-09-27 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
3137. G. G. Simpson. 1935. The Tiffany fauna, Upper Paleocene. 1, Multituberculata, Marsupialia, Insectivora, and ?Chiroptera. American Museum Novitates 795:1-19 [J. Alroy/J. Alroy/P. Mannion]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1632 P. D. Gingerich. 1973. First record of the Palaeocene primate Chiromyoides from North America. Nature 244:517-518 [J. Alroy/J. Alroy/J. Alroy]
1652 P. D. Gingerich. 1983. New Adapisoricidae, Pentacodontidae, and Hyopsodontidae (Mammalia, Insectivora and Condylarthra) from the late Paleocene ofWyoming and Colorado. Contributions from the Museum of Paleontology, University of Michigan 26(11):227-255 [J. Alroy/J. Alroy/P. Mannion]
1731 G. F. Gunnell. 1994. Paleocene mammals and faunal analysis of the Chappo Type Locality (Tiffanian), Green River Basin, Wyoming. Journal of Vertebrate Paleontology 14(1):81-104 [J. Alroy/J. Alroy/J. Alroy]
1931 J. G. Honey. 1988. A Mammalian Fauna from the Base of the Eocene Cathedral Bluffs Tongue of the Wasatch Formation, Cottonwood Creek Area, Southeast Washakie Basin, Wyoming. United States Geological Survey Bulletin 1669-C(1):C1-C14 [J. Alroy/J. Alroy/J. Marcot]
29621 W. D. Matthew. 1917. The dentition of Nothodectes. Bulletin of the American Museum of Natural History 37(33):831-839 [J. Alroy/J. Alroy]
30666 P. V. Rich and D. J. Bohaska. 1981. The Ogygoptyngidae, a new family of owls from the Paleocene of North America. Alcheringa 5(2):95-102 [J. Alroy/J. Alroy]
3124 E. L. Simons. 1960. The Paleocene Pantodonta. Transactions of the American Philosophical Society, New Series 50(6):1-81 [J. Alroy/J. Alroy/M. Carrano]