Mammalon Hill: Puercan, New Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Multituberculata - Taeniolabididae
Catopsalis foliatus Cope 1882
Middleton 1983
one specimen of "Eucosmodon primus" from MH, see Granger and Simpson 1929; also discussed by Lucas et al. 1997; type is from the "Hemithlaeus Zone" somewhere in the San Juan Basin, see Sloan 1981
Mammalia - Multituberculata - Neoplagiaulacidae
Parectypodus vanvaleni n. sp. Sloan 1981
Sloan 1981
MH
Neoplagiaulax macintyrei n. sp. Sloan 1981
Sloan 1981
MH
Mesodma thompsoni Clemens 1964
Sloan 1981
MH
Mammalia - Multituberculata - Ptilodontidae
Kimbetohia campi n. gen., n. sp. Simpson 1936
Simpson 1936
UCMP 31305 - holotype (skull fragment with left P2–4 and partial right P1); referred material: four isolated P4s (Sloan, 1981)
Ptilodus tsosiensis n. sp. Sloan 1981
Sloan 1981
MH
Mammalia - Multituberculata - Eucosmodontidae
Eucosmodon americanus (Cope 1885)
    = Eucosmodon primus n. sp. Sloan 1981
Sloan 1981
replaces ID of Simpson and Granger 1929, Wilson 1956c; type from "three miles southeast of Kimbetoh" and referred specimens from MH
Mammalia
Wortmania otariidens (Cope 1885)
Schoch 1986
KA and MH
Onychodectes tisonensis Cope 1888
Schoch 1986
KA and MH; not clear why this is omitted by Williamson 1996
Erinaceomorpha indet. (Gregory 1910)
close to Adunator: MH
Mammalia - Periptychidae
Gillisonchus gillianus (Cope 1882)
    = Mithrandir gillianus Cope 1882
Alroy 2002
at UNM B77-7 according to Rigby 1981, and probably includes "Anisonchus sp." of Lindsay et al. 1981 from MH
Escatepos campi n. sp. Reynolds 1936
see Reynolds 1936: S & G Loc. 7
Conacodon kohlbergeri n. sp. Archibald et al. 1983
from BLM loc. 1711 and "3 mi. E of Kimbetoh" according to Archibald et al. 1983b; presumably includes "C. sp." of Lindsay et al. 1978 from KA and MH
Conacodon cophater (Cope 1884)
Periptychus coarctatus Cope 1883
presumably includes "Carsioptychus sp." of Lindsay et al. 1978 from MH
Ectoconus ditrigonus (Cope 1882)
presumably includes "E. sp." of Lindsay et al. 1978 from MH; "E. majusculus" reported at lower Kimbetoh Arroyo by Simpson 1941e
Hemithlaeus kowalevskianus Cope 1882
includes "H. sp." of Lindsay et al. 1978 from KA and MH
Conacodon entoconus (Cope 1882)
original and current combination Haploconus entoconus
Fimbrethil ambaronae n. sp. Van Valen 1978
    = Oxyacodon agapetillus Cope 1884
Van Valen 1978
MH several other specimens described by Archibald et al. 1983b from MH
Oxyacodon priscilla Matthew 1937
found at KA "Ectoconus Zone" and UCMP V-2811, 3860: Archibald et al. 1983b
Oxyacodon apiculatus Osborn and Earle 1895
found at UCMP V-2811: Archibald et al. 1983b
Mammalia - Procreodi - Arctocyonidae
Oxyclaenus simplex (Cope 1884)
Oxyclaenus cuspidatus (Cope 1884)
Mimotricentes mirielae n. sp. Van Valen 1978
    = Loxolophus hyattianus Cope 1885
Van Valen 1978
MH
Loxolophus kimbetovius (Matthew 1937)
Mammalia - Acreodi - Triisodontidae
Eoconodon sp. Matthew and Granger 1921
said to be new; "E. cf. copanus" from NMMNH 317 near MH
Eoconodon ginibitohia n. sp. Clemens and Williamson 2005
Clemens and Williamson 2005
from NMMNH loc. 317 "in the vicinity of Mammalon Hill"
Eoconodon gaudrianus (Cope 1888)
Eoconodon coryphaeus (Cope 1885)
Mammalia - Condylarthra - Hyopsodontidae
Bomburia priscus (Matthew 1937)
recombined as Bomburodon priscus
AMNH 58377
Platymastus palantir n. sp. Van Valen 1978
Van Valen 1978
synonym of Bomburodon priscus
MH
Tiznatzinia vanderhoofi Simpson 1936
MH
Promioclaenus wilsoni Van Valen 1978
figured specimen of Van Valen 1988 is from Tsosie Arroyo
    = Valenia wilsoni Van Valen 1978
de Muizon and Cifelli 2000
Choeroclaenus turgidunculus (Cope 1888)
Bubogonia bombadili n. sp. (Van Valen 1978)
is from MH see Van Valen 1978
Mammalia - Cimolestidae
Betonnia tsosia n. gen., n. sp. Williamson et al. 2011
Williamson et al. 2011
NMMNH locality L-646 (1 measurement)
Cimolestes simpsoni n. sp. (Reynolds 1936)
original and current combination Puercolestes simpsoni
see Reynolds 1936: S & G Loc. 7 (6 measurements)
Palaeoryctidae indet. Winge 1917
Van Valen 1966
"Genus B"; "? cf. Ictidopappus" of MacIntyre 1966; MH; discussions of Fox and Youzwyshyn 1994 and Williamson 1996 are compatible with Van Valen's identification
    = Puercolestes simpsoni Reynolds 1936
Williamson et al. 2011
Mammalia
Thylacodon pusillus Matthew and Granger 1921
AMNH 58230, right m2 or 3, left M1, partial M2 or 3
? Peradectes sp. Matthew and Granger 1921
"A": MH
Reptilia - Lacertilia
Lacertilia indet. Owen 1842
Sullivan and Lucas 1986
AMNH specimen from "Mammalon Hill"
Reptilia - Anguidae
Odaxosaurus piger (Gilmore 1928)
Sullivan and Lucas 1986
AMNH specimen from "the Puercan strata of Tsosie Wash"
Proxestops jepseni (Gilmore 1942)
Sullivan and Lucas 1986
synonym of Proxestops silberlingii
AMNH and LACM specimens from "Tsosie Wash/Mammalon Hill"
see common names

Geography
Country:United States State/province:New Mexico County:San Juan
Coordinates: 36.3° North, 108.2° West (view map)
Paleocoordinates:43.2° North, 87.3° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Paleocene
Stage:Danian 10 m.y. bin:Cenozoic 1
*Period:Tertiary
Key time interval:Puercan
Age range of interval:66.00000 - 63.30000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Nacimiento
Local section:Kimbe Local bed:1
Local order:bottom to top
Stratigraphic resolution:member
Stratigraphy comments: underlies Middle ("Upper") Kimbetoh
from an interval about 8 to 16 m above the Ojo Alamo-Nacimiento contact that is entirely of normal polarity and therefore almost certainly represents chron C29n: Lindsay et al. 1981; this interval is just below the middle of the normal zone
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Collection methods and comments
Collection methods:bulk,sieve
Reason for describing collection:general faunal/floral analysis
Taxonomic list comments:replaces list of Williamson and Lucas 1993, which included material from East Flank and West Flank of Kimbetoh Arroyo (see)
Williamson's list 16
although Williamson omits multis, they were described by Sloan 1981
following localities could be from either arroyo: LACM 5090, 5091, 5092, 5394, 5395, 5396; UALP 7631
Williamson and Lucas state that UCMP V-2811, 2813, and 3861 are in Barrel Spring Arroyo, but I consider it likely this is a lapsus
Lucas et al. 1981 claim that MH "Tetraclaenodon" and "pantodont" i.d.s of Rigby and Lucas 1981 are in error
a single interval of less than 8 m according to Lindsay et al. 1981
"? Procerberus sp." and new leptictid "A" are present only at Black Toe (see)

"Desmatoclaenus protogonioides" and "D. dianae" of Williamson and Lucas 1993 are actually from East Flank of Kimbetoh Arroyo (see)
Metadata
Also known as:Bentonnie Tsosie Arroyo/Wash; Betonnie-Tsosie Arroyo; Bitonitsoseh Arroyo; Eduardo Arroyo; Nameless Arroyo; Sinclair and Sinclair and Granger Loc. 7; Tsosie Hill; NMMNH locality L-646; L-0646; UCMP V-2811, V-3860; UNM B77-7
Database number:14760
Authorizer:J. Alroy, K. Beard Enterer:J. Alroy, K. Beard
Modifier:P. Mannion Research group:vertebrate
Created:1994-04-30 00:00:00 Last modified:2018-06-08 11:08:02
Access level:the public Released:1994-04-30 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
31090 W. A. Clemens and T. E. Williamson. 2005. A new species of Eoconodon (Triisodontidae, Mammalia) from the San Juan Basin, New Mexico. Journal of Vertebrate Paleontology 25(1):208-213 [K. Beard/K. Beard]
7306 C. de Muizon and R. L. Cifelli. 2000. The "condylarths" (archaic Ungulata, Mammalia) from the early Palaeocene of Tiupampa (Bolivia): implications on the origin of the South American ungulates. Geodiversitas 22(1):47-150 [J. Alroy/J. Alroy/P. Mannion]
2248 E. H. Lindsay, R. F. Butler, and N. M. Johnson. 1981. Magnetic polarity zonation and biostratigraphy of Late Cretaceous and Paleocene continental deposits, San Juan Basin, New Mexico. American Journal of Science 281:390-435 [J. Alroy/J. Alroy/M. Carrano]
42982 D. L. Lofgren, B. M. Gaytan, M. Pastrano, J. E. Rice, and R. L. Zheng. 2012. First record of Kimbetohia campi (Mammalia, Multituberculata) from the Paleocene part of the North Horn Formation, Utah. Journal of Vertebrate Paleontology 32(5):1214-1217 [P. Mannion/P. Mannion]
2585 M. D. Middleton. 1983. Early Paleocene vertebrates of the Denver Basin, Colorado. 1-404 [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]
3142 G. G. Simpson. 1936. Additions to the Puerco fauna, Lower Paleocene. American Museum Novitates 849 [J. Alroy/J. Alroy/J. Ju]
3195 R. E. Sloan. 1981. Systematics of Paleocene multituberculates from the San Juan Basin, NewMexico. In S. G. Lucas, J. K. Rigby Jr., B. S. Kues (eds.), Advances in San Juan Basin Paleontology 127-160 [J. Alroy/J. Alroy/M. Uhen]
727 R. M. Sullivan and S. G. Lucas. 1986. Annotated list of lower vertebrates from the Paleocene Nacimiento Formation (Puercan-Torrejonian), San Juan Basin, New Mexico. Journal of Herpetology 20(2):202-209 [J. Alroy/M. Sommers/J. Alroy]
3482 L. Van Valen. 1966. Deltatheridia, a new order of Mammals. Bulletin of the American Museum of Natural History 132(1):1-126 [J. Alroy/J. Alroy/M. Carrano]
3485 L. M. Van Valen. 1978. The beginning of the Age of Mammals. Evolutionary Theory 4:45-80 [J. Alroy/J. Alroy/M. Carrano]
42804 T. Williamson and T. Carr. 2007. Bomburia and Ellipsodon (Mammalia: Mioclaenidae) from the Early Paleocene of New Mexico. Journal of Paleontology 81:966-985 [T. Williamson/T. Williamson/P. Mannion]
43994 T. E. Williamson, S. L. Brusatte, T. D. Carr, A. Weil, and B. R. Standhardt. 2012. The phylogeny and evolution of Cretaceous–Palaeogene metatherians: cladistic analysis and description of new early Palaeocene specimens from the Nacimiento Formation, New Mexico. Journal of Systematic Palaeontology 10(4):625-651 [P. Mannion/P. Mannion]
35859 T. E. Williamson, A. Weil, and B. Standhardt. 2011. Cimolestids (Mammalia) from the early Paleocene (Puercan) of New Mexico. Journal of Vertebrate Paleontology 31(1):162-180 [J. Alroy/J. Alroy]