Barrel Spring Arroyo (Taeniolabis Zone) (Paleocene of the United States)

Also known as UCMP V-70180, 70181 (Three Gullies Over); De-na-zin Wash; Fossil Horizon B; KU-NM-03; KUVP Loc. 3; KU-3; KU locality 3

Where: San Juan County, New Mexico (36.3° N, 108.0° W: paleocoordinates 43.2° N, 87.1° W)

• coordinate estimated from map

When: Nacimiento Formation, Puercan (66.0 - 63.3 Ma)

• high in a normal magnetic polarity zone in the Barrel Spring Arroyo = De-na-zin Wash section interpreted as C29n based on the position of the K-T boundary in the section: see Butler et al. 1977, Lucas et al. 1997

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: R. W. Wilson. 1956. The condylarth genus Ellipsodon. University of Kansas Publications, Museum of Natural History 9(5):105-116 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14662: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• overlies Ectoconus Zone
identical to list 8 of Williamson 1996
in a normal paleomag interval that must represent chron 29N because the K-T is in a reversed interval at the base of the section
"Acmeodon secans" of Van Valen 1966 is indeterminate: Williamson and Lucas 1993

type of "Ellipsodon witkoi" Van Valen 1978 is probably NOT Puercan, but provenance is unclear: Williamson and Lucas 1993
Reptilia indet.5 Laurenti 1768 reptile
 Loricata -
Crocodylia indet.2 crocodilian
Mammalia indet.5 Linnaeus 1758 mammal
 Theriamorpha - Peradectidae
? Peradectes sp.7 Matthew and Granger 1921 marsupial
"sp. A"
 Theriamorpha - Herpetotheriidae
Thylacodon pusillus7 Matthew and Granger 1921 marsupial
 Condylarthra - Hyopsodontidae
Valenia wilsoni4 Van Valen 1978 condylarth
Bubogonia bombadili7 Van Valen 1978 condylarth
figured by Van Valen 1988
"Bomburia priscus" = Bomburodon priscus1 Matthew 1937 condylarth
Ellipsodon ? grangeri7 Wilson 1956 condylarth
Tiznatzinia vanderhoofi7 Simpson 1936 condylarth
Choeroclaenus turgidunculus1 Cope 1888 condylarth
 Acreodi - Triisodontidae
Eoconodon coryphaeus7 Cope 1885 placental
 Theriamorpha - Periptychidae
Periptychus coarctatus1 Cope 1883 condylarth
Ectoconus ditrigonus1 Cope 1882 condylarth
Mithrandir gillianus1 Cope 1882 condylarth
Oxyacodon apiculatus n. sp.3 Osborn and Earle 1895 condylarth
"Taniolabis zone/facies"; UCMP V-70181, KU-NM-03; type is from AMNH Coal Creek Canyon locality; not clear why this is omitted by Williamson and Lucas 1993 DUPLICATE REF 965 or 966
Conacodon cophater1 Cope 1884 condylarth
 Procreodi - Arctocyonidae
"Oxyclaenus antiquus" = Carcinodon antiquus1 Simpson 1936 condylarth
Oxyclaenus simplex7 Cope 1884 condylarth
described by Simpson 1936b
Oxyclaenus cuspidatus7 Cope 1884 condylarth
Loxolophus pentacus7 Cope 1888 condylarth
Loxolophus hyattianus7 Cope 1885 condylarth
Loxolophus stenognathus1 Matthew 1897 condylarth
Loxolophus priscus7 Cope 1888 condylarth
 Cimolesta - Cimolestidae
"Cimolestes ? simpsoni" = Puercolestes simpsoni7
"Cimolestes ? simpsoni" = Puercolestes simpsoni7 Reynolds 1936 eutherian
from KUVP Loc. 3 according to Clemens 1973
 Theriamorpha - Stylinodontidae
Wortmania otariidens7 Cope 1885 taeniodont
 Theriamorpha -
Onychodectes tisonensis7 Cope 1888 taeniodont
 Multituberculata - Eucosmodontidae
Eucosmodon americanus Cope 1885 multituberculate
KUVP Loc. 3; probably OK, see Sloan 1981
 Multituberculata - Taeniolabididae
Taeniolabis taoensis6 Cope 1882 multituberculate
KU-3, UCMP V-70180, 70181; includes "T. sp." of Lindsay et al. 1978
Catopsalis sp.1 Cope 1882 multituberculate