Trumbo's Anthill (Cretaceous of the United States)

Also known as UCMP V-72213

Where: Garfield County, Montana (47.5° N, 107.1° W: paleocoordinates 54.4° N, 80.7° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Hell Creek Formation, Lancian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; sandstone

Size class: mesofossils

Reposited in the UCMP

Collection methods: bulk, surface (float), anthill, sieve,

Primary reference: J. D. Archibald. 1982. A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. University of California Publications in Geological Sciences 122:1-286 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14639: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• this is the only Lancian Hell Creek area locality high enough in the section to be close to the C29r - C30n transition reported by Archibald et al. 1982 and Swisher et al. 1993 at about 15 m below the Z Coal; transition dated at 65.578 Ma by Cande and Kent 1995
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus2 Cope 1876 whiptail stingray
 Euselachii -
Rajiformes indet.2 Berg 1940 ray
 Teleostei -
? Elopiformes indet.2 Sauvage 1875
 Amiiformes - Amiidae
Amia sp.2 Linnaeus 1766 bowfin
Amia fragosa2 Jordan 1927 bowfin
Amia uintaensis2 Leidy 1873 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.2 de Lacep├Ęde 1803 gar
Lepisosteus occidentalis2 Leidy 1856 gar
 Proteida - Batrachosauroididae
Opisthotriton kayi2 Auffenberg 1961 tetrapod
 Salientia -
 Caudata - Urodela
Habrosaurus dilatus2 Gilmore 1928 siren
Scapherpeton tectum2 Cope 1876 salamander
Reptilia indet.2 Laurenti 1768 reptile
 Testudines - Trionychidae
Trionychidae indet.2 Gray 1825 softshell turtle
 Testudines - Baenidae
Neurankylus eximius2 Lambe 1902 turtle
 Testudines -
Cryptodira indet.2 Cope 1868 turtle
 Testudines - Adocidae
Adocus sp.2 Cope 1868 turtle
 Sauria -
Sauria indet.2 diapsid
 Dinosauria -
 Theropoda -
 Avetheropoda - Caenagnathidae
Chirostenotes sp.2 Gilmore 1924 coelurosaur
 Avetheropoda - Dromaeosauridae
Richardoestesia sp.2 Currie et al. 1990 coelurosaur
Saurornitholestinae indet.3 Longrich and Currie 2009 coelurosaur
UCMP 187037
Aves indet.2 Linnaeus 1758 bird
 Avetheropoda - Coeluridae
Coeluridae indet.2 Marsh 1881 coelurid
 Neornithischia - Ceratopsidae
Ceratopsidae indet.2 Marsh 1888 ceratopsid
 Neornithischia - Thescelosauridae
Thescelosaurus sp.2 Gilmore 1913 ornithischian
 Neornithischia - Hadrosauridae
Hadrosauridae indet.2 Cope 1869 hadrosaurid
 Crocodylia -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii2
"Leidyosuchus sternbergi" = Borealosuchus sternbergii2 Gilmore 1910 crocodilian
 Crocodylia - Crocodylidae
Crocodylidae indet.2 Cuvier 1807 crocodile
 Crocodylia - Alligatoridae
Protocaiman sp.2 Bona et al. 2018 crocodilian
Brachychampsa montana2 Gilmore 1911 crocodilian
 Squamata -
Parasaniwa wyomingensis2 Gilmore 1928 lizard
 Squamata - Anguidae
Odaxosaurus piger2 Gilmore 1928 lizard
 Choristodera -
Champsosaurus sp.2 Cope 1876 choristodere
Champsosaurus natator2 Parks 1933 choristodere
 Theriiformes - Peradectidae
"Pediomys florencae" = Aletridelphys florencae
"Pediomys florencae" = Aletridelphys florencae Clemens 1966 metatherian
 Didelphimorphia - Alphadontidae
Alphadon sp.1 Simpson 1927 marsupial
 Multituberculata - Cimolomyidae
Meniscoessus robustus Marsh 1889 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma cf. formosa Marsh 1889 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus Marsh 1889 multituberculate