Big Pocket (Paleocene of the United States)

Also known as Angels Peak; KUVP Loc. 13; Locality NM 13; NMMNH 2635; UALP 7435, 7436, 75144; NMMNH locality L-2635

Where: San Juan County, New Mexico (36.6° N, 108.0° W: paleocoordinates 43.1° N, 87.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Nacimiento Formation, Torrejonian (63.3 - 61.7 Ma)

• from "a zone... three to four feet in thickness... The actual bone layer, not as yet located, may prove to be thinner than this" (Wilson 1951)

•not far below the middle of a reversed magnetic polarity zone in the Kutz Canyon section interpreted as C27r based on the position of the K-T boundary in the correlative Barrel Spring Arroyo = De-na-zin Wash section: see Butler et al. 1977, Lucas et al. 1997

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; concretionary, red siltstone

• "reddish silt" (Wilson 1951)

Size class: macrofossils

Preservation: concretion

Collection methods: surface (float),

Primary reference: R. W. Wilson. 1956. A new multituberculate from the Paleocene Torrejon fauna of New Mexico. Transactions of the Kansas Academy of Sciences 59(1):76-84 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14816: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

• UALP localities are at exactly the same level as KUVP 13 but may be at some distance

•following taxa listed by Williamson and Lucas may be from Big Pocket or a stratigraphically nearby locality: ? Peradectes sp. "D" Pentacodon inversus Protictis haydenianus "Protictis" sp. "A" Protictis (Protictis) sp. "B" Triisodon quivirensis Ellipsodon inaequidens

unclassified
  -
Mammalia
 Cimolesta - Cimolestidae
Acmeodon cf. secans Matthew and Granger 1921 eutherian
described by Wilson 1985
 Cimolesta - Palaeoryctidae
Palaeoryctes cf. puercensis Matthew 1913 eutherian
confirmed by Williamson and Lucas 1993
 Cimolesta - Pentacodontidae
Coriphagus encinensis Matthew and Granger 1921 eutherian
 Leptictida - Leptictidae
Prodiacodon puercensis9 Matthew 1918 eutherian
 Primates -
Palaechthon cf. woodi9 Gazin 1971 primate
NMMNH 2635
Palaechthon torrejonius7 Kay and Cartmill 1977 primate
included in Plesiolestes nacimienti by Gunnell 1989
 Primates - Palaechthonidae
Plesiolestes nacimienti n. sp.2 Wilson and Szalay 1972 primate
 Ferae - Viverravidae
Protictis simpsoni n. sp.3 Meehan and Wilson 2002 placental
"n. sp. a"
Protictis minor n. sp.3 Meehan and Wilson 2002 placental
"n. sp. b"
Bryanictis paulus n. sp.3 Meehan and Wilson 2002 placental
 Taeniodonta - Conoryctidae
Conoryctella pattersoni4 Schoch and Lucas 1981 taeniodont
 Taeniodonta - Stylinodontidae
Psittacotherium multifragum Cope 1882 taeniodont
 Tribosphenida - Arctocyonidae
"Mimotricentes subtrigonus" = Tricentes subtrigonus6 Cope 1881 condylarth
Chriacus pelvidens Cope 1881 condylarth
Chriacus pelvidens6 Cope 1881 condylarth
 Ungulata - Hyopsodontidae
Ellipsodon grangeri n. sp.10 Wilson 1956 condylarth
"Promioclaenus ? lemuroides" = Ellipsodon lemuroides Matthew 1897 condylarth
Ellipsodon yotankae8 Van Valen 1978 condylarth
NMMNH P-30646
Mioclaenus sp.6 Cope 1881 condylarth
said to be new
"Protoselene opisthacus" = Mioclaenus opisthacus Cope 1882 condylarth
Mioclaenus turgidus Cope 1881 condylarth
Promioclaenus acolytus Cope 1882 condylarth
 Ungulata - Periptychidae
Periptychus carinidens Cope 1881 condylarth
Anisonchus sectorius Cope 1881 condylarth
 Ungulata - Phenacodontidae
Tetraclaenodon puercensis Cope 1881 condylarth
NMMNH P-20949 (nearly complete skeleton)
 Insectivora - Mixodectidae
Mixodectes malaris Cope 1884 insectivoran
 Acreodi - Triisodontidae
Triisodon sp. Cope 1881 eutherian
Goniacodon levisanus Cope 1883 eutherian
 Acreodi - Oxyclaenidae
Pentacodon sp. Scott 1892 eutherian
said to be new
 Hyaenodonta -
Deltatherium fundaminis Cope 1881 eutherian
 Multituberculata - Neoplagiaulacidae
Parectypodus trovessartianus1 Cope 1882 multituberculate
Parectypodus clemensi n. sp.5 Sloan 1981 multituberculate
Ectypodus szalayi5 Sloan 1981 multituberculate
 Multituberculata - Cimolodontidae
Anconodon gidleyi5 Simpson 1935 multituberculate