Fort Union Formation

|C. fontanus

| Northeastern Montana.{{Cite journal |last=Clemens |first=William A. |date=2018-02-17 |title=A pantodont (Mammalia) from the latest Puercan North American Land Mammal Age (earliest Paleocene) of the Western Interior, USA |url=https://doi.org/10.1080/08912963.2016.1276178 |journal=Historical Biology |volume=30 |issue=1–2 |pages=183–188 |doi=10.1080/08912963.2016.1276178 |bibcode=2018HBio...30..183C |s2cid=132830375 |issn=0891-2963|url-access=subscription }}

|Tullock Member.

|An isolated upper molar.

| A pantodont.

|

|P. crustulum

| Garfield & McCone counties, Montana.{{Cite journal |last=Clemens |first=W. |date=January 9, 2015 |title=(Leptictidae, Mammalia) from the Tullock Member of the Fort Union Formation, Garfield and McCone Counties, Montana, USA |journal=PaleoBios |language=en |volume=32 |issue=1 |pages=1–17|doi=10.5070/P9321025382 |s2cid=55974838 |doi-access=free }}

|Tullock Member.

|Fragmentary dentary & isolated teeth.

| A leptictid.

|

|style="background:#fbdddb;" |P. sp.

|style="background:#fbdddb;" |Swain Quarry, Wyoming.{{Cite journal |last=Johanson |first=Zerina |date=November 1996 |title=New marsupial from the Fort Union Formation, Swain Quarry, Wyoming |url=https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/new-marsupial-from-the-fort-union-formation-swain-quarry-wyoming/32D033CDFC2A42D61645C86AE4B1E5C1 |journal=Journal of Paleontology |language=en |volume=70 |issue=6 |pages=1023–1031 |doi=10.1017/S0022336000038725 |bibcode=1996JPal...70.1023J |s2cid=133554548 |issn=0022-3360|url-access=subscription }}

|style="background:#fbdddb;" |

|style="background:#fbdddb;" |Upper & lower molars.

|style="background:#fbdddb;" |Reassigned to Swaindelphys.

|style="background:#fbdddb;" |

|S. cifellii

|Swain Quarry, Wyoming.

|

|Upper & lower molars.

|An opossum.

|

|C. sp.

|Wind River Basin, Wyoming.{{Cite journal |last=Gazin |first=C. Lewis |date=1971 |title=Paleocene primates from the shotgun member of the Fort Union Formation in the Wind River Basin, Wyoming |url=https://www.biodiversitylibrary.org/part/44304 |journal=Proceedings of the Biological Society of Washington |volume=84 |pages=13–37 |issn=0006-324X}}

|Shotgun Member.

|2 isolated fourth lower premolars.

|A carpolestid.

|File:Carpodaptes aulacodon.jpg

|C. caesor

|Hell's Half Acre (UCM locality 78009), Mesa County, Colorado.{{Cite journal |last1=Burger |first1=Benjamin J. |last2=Honey |first2=James G. |date=2008-09-12 |title=Plesiadapidae (Mammalia, Primates) from the late Paleocene Fort Union Formation of the Piceance Creek Basin, Colorado |url=https://www.researchgate.net/publication/232670200 |journal=Journal of Vertebrate Paleontology |volume=28 |issue=3 |pages=816–825 |doi=10.1671/0272-4634(2008)28[816:pmpftl]2.0.co;2 |s2cid=128913932 |issn=0272-4634}}

|

|A single upper incisor (UCM 53515).

|A plesiadapid.

|

|Piceance Creek Basin, Colorado.

|

|Multiple teeth.

|A plesiadapid.

|

|UCM locality 78060, Colorado.

|

|A left molar (UCM 41606).

|A plesiadapid.

|

|E. shotgunensis

|Wind River Basin, Wyoming.

|Shotgun Member.

|Right ramus of mandible & isolated teeth.

|A carpolestid.

|

|N. gazini

|Fremont County, Colorado.

|

|A right maxilla (USGS 16872).

|A plesiadapid.

|

|P., near P. alticuspis

|Wind River Basin, Wyoming.

|Shotgun Member.

|3 upper molars & 4 lower molars.

|A plesiadapiform.

|

|Wind River Basin, Wyoming.

|Shotgun Member.

|A lower jaw & 13 isolated teeth.

|A plesiadapiform.

|

|P. cf. minor

|Wind River Basin, Wyoming.

|Shotgun Member.

|5 lower teeth.

|A plesiadapiform.

|

|P., near P. depressidens

|Wind River Basin, Wyoming.

|Shotgun Member.

|Approximately 12 upper teeth, 8 isolated lower teeth & a jaw fragment.

|A paromomyid.

|

|P. fremontensis

|Wind River Basin, Wyoming.

|Shotgun Member.

|A lower jaw & isolated teeth.

|A paromomyid.

|

|Wind River Basin, Wyoming.

|Shotgun Member.

|2 upper molars & 8 isolated lower molars.

|A paromomyid.

|

|P. dubius

|Piceance Creek Basin, Colorado.

|

|Jaw elements & teeth.

|A plesiadapid.

|File:Plesiadapis sp. - MUSE.JPG

|Piceance Creek Basin, Colorado.

|

|Jaw elements & teeth.

|A plesiadapid.

|

|Wind River Basin, Wyoming.

|Shotgun Member.

|5 lower molars, 3 anterior upper molars & a premolar.

|A plesiadapid.

|File:Plesiadapis NT.jpg

|P. cf. problematicus

|Wind River Basin, Wyoming.

|Shotgun Member.

|Approximately 45 isolated teeth.

|A plesiadapiform.

|

|P. intermedius

|Wind River Basin, Wyoming.

|Shotgun Member.

|Jaw elements & teeth.

|A plesiadapid.

|

|P. janisae

|'Harley's Point’ UCMP locality V77087, Garfield County, Montana.{{Cite journal |last1=Wilson Mantilla |first1=Gregory P. |last2=Chester |first2=Stephen G. B. |last3=Clemens |first3=William A. |last4=Moore |first4=Jason R. |last5=Sprain |first5=Courtney J. |last6=Hovatter |first6=Brody T. |last7=Mitchell |first7=William S. |last8=Mans |first8=Wade W. |last9=Mundil |first9=Roland |last10=Renne |first10=Paul R. |title=Earliest Palaeocene purgatoriids and the initial radiation of stem primates |journal=Royal Society Open Science |year=2021 |volume=8 |issue=2 |pages=210050 |doi=10.1098/rsos.210050 |issn=2054-5703 |pmc=8074693 |pmid=33972886|bibcode=2021RSOS....810050W }}

|Tullock Member.

|UCMP 150018 (right m1), and UCMP 192398 (left m3).

|A purgatoriid.

|

|Garfield County, Montana.

|Tullock Member.

|Dentary remains & teeth.

|A purgatoriid.

|

|Harley's Point’ UCMP locality V77087, Garfield County, Montana.

|Tullock Member.

|UCMP 150019 (right M2), and UCMP 150020 (right M2).

|A purgatoriid.

|

|Cf. T. wilsoni

|Wind River Basin, Wyoming.

|Shotgun Member.

|About 14 lower teeth & possibly 3 upper molars.

|A plesiadapiform.

|

|Z. honeyi

| UMC locality number 92177, Colorado.{{Cite journal |last=Burger |first=Benjamin John |date=2013-10-29 |title=A new species of the archaic primate Zanycteris from the late Paleocene of western Colorado and the phylogenetic position of the family Picrodontidae |journal=PeerJ |volume=1 |pages=e191 |doi=10.7717/peerj.191 |issn=2167-8359 |pmc=3817582 |pmid=24255808 |doi-access=free }}

|Atwell Gulch Member.

|Right maxilla (UCM 87378).

| A plesiadapiform.

|

|D. argenteus

|Princeton Quarry, Park County, Wyoming.{{Cite journal |last1=O'Leary |first1=Maureen A. |last2=Rose |first2=Kenneth D. |date=1995-05-12 |title=New mesonychian dentitions from the Paleocene and Eocene of the Bighorn Basin, Wyoming |url=https://www.biodiversitylibrary.org/part/215127 |journal=Annals of the Carnegie Museum |volume=64 |issue=2 |pages=147–172 |doi=10.5962/p.215127 |s2cid=89955337 |issn=0097-4463|doi-access=free |bibcode=1995AnCM...64..147O }}

|Upper part of the formation.

|Jaw elements & teeth.

|A mesonychid.

|File:Dissacus argenteus.jpg

|style="background:#fbdddb;" |Princeton Quarry, Park County, Wyoming.

|style="background:#fbdddb;" |Upper part of the formation.

|style="background:#fbdddb;" |Jaw elements & teeth.

|style="background:#fbdddb;" |Specimens reassigned to D. argenteus.

|style="background:#fbdddb;" |

|Park County, Wyoming.

|Upper part of the formation.

|Mandible (YPM-PU 16159).

|A mesonychid also known from the Willwood Formation.

|

|E. mediotuber

|Princeton Quarry, Wyoming.{{Cite journal |last=Thewissen |first=J. G. M. |date=1990 |title=Evolution of Paleocene and Eocene Phenacodontidae (Mammalia, Condylarthra) |hdl=2027.42/48629 |url=http://deepblue.lib.umich.edu/handle/2027.42/48629 |language=en-US}}

|

|Dentary.

|A phenacodontid.

|

|P. carinidens

|Makoshika State Park, Montana.{{Cite journal |last1=Shelley |first1=Sarah L. |last2=Williamson |first2=Thomas E. |last3=Brusatte |first3=Stephen L. |date=2018-07-18 |title=The osteology of Periptychus carinidens: A robust, ungulate-like placental mammal (Mammalia: Periptychidae) from the Paleocene of North America |journal=PLOS ONE |language=en |volume=13 |issue=7 |pages=e0200132 |doi=10.1371/journal.pone.0200132 |issn=1932-6203 |pmc=6051615 |pmid=30020948|bibcode=2018PLoSO..1300132S |doi-access=free }}

|

|

|A periptychid also found in the Nacimiento, North Horn, Black Peaks & Animas formations.

|File:Periptychus skeletal.PNG

|S. magnadivisus

|Great Divide Basin, southern Wyoming.{{Cite journal |last1=McComas |first1=Katie M. |last2=Eberle |first2=Jaelyn J. |date=May 2015 |title=A new earliest Paleocene (Puercan) arctocyonid mammal from the Fort Union Formation, Great Divide Basin, Wyoming, and its phylogenetic position among early 'condylarths' |url=https://www.tandfonline.com/doi/abs/10.1080/14772019.2015.1066886?cookieSet=1 |journal=Journal of Systematic Palaeontology |volume=14 |issue=6 |pages=445–459|doi=10.1080/14772019.2015.1066886 |s2cid=127411164 |url-access=subscription }}

|China Butte Member.

|

|An arctocyonid.

|

|L. celetius

|Bangtail Quarry, Sedan Quadrangle, Park County, Montana.{{Cite journal |last=Houde |first=Peter W. |date=1988 |title=Paleognathous Birds from the Early Tertiary of the Northern Hemisphere |url=http://dx.doi.org/10.2307/4087644 |journal=The Auk |volume=107 |issue=2 |pages=455–456 |doi=10.2307/4087644 |jstor=4087644 |issn=0004-8038|url-access=subscription }}

|

|

|A lithornithid.

|File:Lithornis.png

|A. sp.

| Princeton Quarry, Park County, Wyoming.{{Cite journal |last=Estes |first=Richard |date=1975 |title=Lower Vertebrates from the Fort Union Formation, Late Paleocene, Big Horn Basin, Wyoming |url=https://www.jstor.org/stable/3891523 |journal=Herpetologica |volume=31 |issue=4 |pages=365–385 |jstor=3891523 |issn=0018-0831}}

|

|Anterior end of left dentary (PU 16988).

|A crocodilian.

|File:Allognathosuchus gracilis.jpg

|Genus & species indeterminate

|Swain Quarry, Carbon County, Wyoming.

|

|Fragmentary jaw elements.

|An anguid lizard.

|

|

|Swain Quarry, Carbon County, Wyoming.

|

|6 partial dentaries.

|Provisionally referred to anguid lizards based on size & shape.

|

|cf. C. sloani

|Swain Quarry, Carbon County, Wyoming.{{Cite journal |last=Sullivan |first=Robert M. |date=January 1982 |title=Fossil lizards from Swain Quarry "Fort Union Formation," middle Paleocene (Torrejonian), Carbon County, Wyoming |url=https://www.researchgate.net/publication/289505965 |journal=Journal of Paleontology |volume=56 |issue=4 |pages=996–1010}}

|

|Posterior part of a right maxilla (AMNH 12069).

|A skink.

|

|E. cf. E. lancensis

|Swain Quarry, Carbon County, Wyoming.

|

|4 partial dentaries.

|A xenosaurid lizard.

|

|Princeton & Schaff quarries, Park County, Wyoming.

|

|Multiple specimens.

|A xenosaurid lizard.

|

|Genus & species indeterminate

|Swain Quarry, Carbon County, Wyoming.

|

|Several jaw remains.

|A glyptosaurine lizard.

|

|Genus & species indeterminate

|Swain Quarry, Carbon County, Wyoming.

|

|Fragmentary jaw elements & osteoderms.

|Indeterminate lizard remains.

|

|M. torrejonensis

|Swain Quarry, Carbon County, Wyoming.

|

|Numerous jaw elements.

|An anguid lizard also known from the Nacimiento Formation.

|

|O. piger

|Swain Quarry, Carbon County, Wyoming.

|

|Many fragmentary jaw remains.

|An anguid lizard.

|

|O. wyomingensis

|Park County, Wyoming.

|

|A left mandible (PU 14246).

|An amphisbaenian.

|

|cf. P. canadensis

|Swain Quarry, Carbon County, Wyoming.

|

|Medial part of left dentary (AMNH 15957).

|A large anguimorph lizard.

|

|P. fera

|Swain Quarry, Carbon County, Wyoming.

|

|Numerous jaw elements.

|A night lizard.

|

|P. piger

|Princeton, Fritz & Schaff quarries, Park County, Wyoming.

|

|Multiple skull elements.

|An anguid lizard.

|

|P. acutus

|Princeton Quarry, Park County, Wyoming.

|

|PU 14243 (left maxilla), 14561 (anterior portion of left dentary) & 17145 ( fragment of left maxilla).

|A palaeovaranid lizard.

|

|Swain Quarry, Carbon County, Wyoming.

|

|3 partial dentaries (AMNH 14306, 14307 & 14309).

|A palaeovaranid lizard.

|

|Unidentified genus & species

|Fritz Quarry, Park County, Wyoming.

|

|An almost complete right dentary & a broken vertebra (PU 18627).

|An amphisbaenian.

|

|cf. S. sp.

|Swain Quarry, Carbon County, Wyoming.

|

|2 trunk vertebrae (AMNH 15960 & 16003).

|A varanid.

|

|S. milleri

|Swain Quarry, Carbon County, Wyoming.

|

|Jaw elements.

|An iguanid.

|

|A. entopteros

|Montana.{{Citation |last=Hutchison |first=J. Howard |title=New Turtles from the Paleogene of North America |date=2013 |url=https://doi.org/10.1007/978-94-007-4309-0_26 |work=Morphology and Evolution of Turtles |series=Vertebrate Paleobiology and Paleoanthropology |pages=477–497 |editor-last=Brinkman |editor-first=Donald B. |place=Dordrecht |publisher=Springer Netherlands |language=en |doi=10.1007/978-94-007-4309-0_26 |isbn=978-94-007-4309-0 |access-date=2022-11-19 |editor2-last=Holroyd |editor2-first=Patricia A. |editor3-last=Gardner |editor3-first=James D.|url-access=subscription }}

|Tullock Member.

|

|A softshell turtle.

|

|A. montinsana

|PTRM Site V02017, Slope County, North Dakota.{{Cite journal |last=Vitek |first=Natasha S. |date=2012-03-11 |title=Giant fossil soft-shelled turtles of North America |url=https://palaeo-electronica.org/content/2012-issue-1-articles/210-giant-soft-shelled-turtles |journal=Palaeontologia Electronica |language=English |volume=15 |issue=16 |pages=1–43 |doi=10.26879/299 |issn=1094-8074|doi-access=free }}

|

|Numerous skull, limb & shell fragments.

|A softshell turtle also found in the Melville & Denver formations.

|

|C. rogerwoodi

|Reis Quarry, Park County, Wyoming.{{Cite journal |last1=Joyce |first1=Walter G. |last2=Claude |first2=Julien |date=2020-01-15 |title=An alternative interpretation of the Paleogene turtle Cardichelyon rogerwoodi as a hinged kinosternoid |journal=Journal of Paleontology |volume=94 |issue=3 |pages=557–567 |doi=10.1017/jpa.2019.92 |bibcode=2020JPal...94..557J |s2cid=210976208 |issn=0022-3360|doi-access=free }}

|

|Partial skeleton (YPM PU14671).

|A kinosternoid formerly thought to be a platysternid.

|

|C. putorius

|Cedar Point Quarry, Wyoming.{{Cite journal |last1=Lyson |first1=Tyler R. |last2=Joyce |first2=Walter G. |date=November 2009 |title=A revision of Plesiobaena (Testudines: Baenidae) and an assessment of baenid ecology across the K/T boundary |url=https://www.researchgate.net/publication/228491454 |journal=Journal of Paleontology |language=en |volume=83 |issue=6 |pages=833–853 |doi=10.1666/09-035.1 |s2cid=85964417 |issn=0022-3360}}

|

|Shell & skull elements.

|A baenid turtle also found in the Hell Creek Formation.

|File:Cedrobaena putorius.jpg

|H. arctochelys

|Burns Mine, Washoe Area, Carbon County, Montana.{{Cite journal |last1=Joyce |first1=Walter G. |last2=Revan |first2=Ariel |last3=Lyson |first3=Tyler R. |last4=Danilov |first4=Igor G. |date=2009 |title=Two New Plastomenine Softshell Turtles from the Paleocene of Montana and Wyoming |url=https://www.academia.edu/en/2380203/Two_new_plastomenine_softshell_turtles_from_the_Paleocene_of_Montana_and_Wyoming |journal=Bulletin of the Peabody Museum of Natural History |volume=50 |issue=2 |pages=307 |doi=10.3374/014.050.0202 |bibcode=2009BPMNH..50..307J |s2cid=85505337 |issn=0079-032X}}

|Tongue River Member.

|Multiple shell elements.

|A softshell turtle.

|

|Fallon County, Montana.

|Ekalaka Member.

|A near complete postcranial skeleton (YPM PU 16795) & shell elements.

|A softshell turtle.

|

|Duffy's Ranch, Sweet Grass County, Montana.

|

|YPM PU 11566.

|A softshell turtle.

|

|P. sp.

| Princeton Quarry & Reiss Locality, Park County, Wyoming.

|

|PU 17794 (fragments of the skull & shell), 14671 & 16443 (shells).

| A turtle.

|

|T. montanus

|Montana.

|Tullock Member.

|

|A chelydrid turtle also known from the Hell Creek Formation.

|

|A. jepseni

|Park County, Wyoming.

|

|PU 14666 (partial vertebral column), 14668 (partial skull) & 16788 (dislocated vertebrae).

|An aquatic salamander.

|

|Incertae sedis

|Park County, Wyoming.

|

|PU 14662 (distal end of right radioulna), 14663 (proximal end of left radioulna), 14669 (phalanx), 13372 (right maxilla).

|A frog.

|

|Undescribed genus & species

|Park County, Wyoming.

|

|Distal end of right humerus (PU 14670).

|A frog similar to undescribed discoglossid remains from the Hell Creek Formation.

|

|E. sp.

|Princeton & Fritz quarries, Park County, Wyoming.

|

|Humeri & vertebrae.

|A burrowing toad.

|

|O. kayi

|Princeton Quarry, Park County, Wyoming.

|

|Multiple specimens.

|A salamander.

|

|S. tectum

| Princeton & Schaff quarries, Park County, Wyoming.

|

|PU 20583 (3 broken vertebrae, an atlas, an ilium & a rib) & PU 19500 (a humerus).

| A salamander.

|File:Scapherpeton.jpg

|Morphotype A

| Eagle Mine near Bear Creek, Carbon County, Montana.{{Cite journal |last=Brownstein |first=Chase Doran |date=November 2022 |title=Evidence of large sturgeons in the Paleocene of North America |journal=Journal of Paleontology |volume=97 |language=en |pages=218–222 |doi=10.1017/jpa.2022.87 |s2cid=253653018 |issn=0022-3360|doi-access=free }}

|

|A complete lateral scute (YPM VPPU 17066).

| A large sturgeon.

|

|Highway Blowout Site, Fallon County, Montana.

|Tongue River Member.

|A complete lateral scute (YPM VPPU 16646).

|A large sturgeon.

|

|A. basiloides

|Burns Mine and Eagle Mine near Bear Creek, Carbon County, Montana{{Cite journal |last1=Brownstein |first1=Chase D. |last2=Near |first2=Thomas J. |date=2024 |title=A giant bowfin from a Paleocene hothouse ecosystem in North America |url=https://academic.oup.com/zoolinnean/advance-article-abstract/doi/10.1093/zoolinnean/zlae042/7659736 |access-date=2024-04-30 |journal=Zoological Journal of the Linnean Society |volume=202 |issue=4 |doi=10.1093/zoolinnean/zlae042|url-access=subscription }}

|

|A near complete skull and partial skeleton, isolated vertebra

|A large bowfin.

|

|A. grandei

|Bowman County, North Dakota.{{Cite journal |last1=Brownstein |first1=Chase Doran |last2=Lyson |first2=Tyler R. |title=Giant gar from directly above the Cretaceous–Palaeogene boundary suggests healthy freshwater ecosystems existed within thousands of years of the asteroid impact |journal=Biology Letters |year=2022 |volume=18 |issue=6 |pages=20220118 |doi=10.1098/rsbl.2022.0118 |pmc=9198771 |pmid=35702983}}

|Lowest Danian strata.

|

|A large gar.

|

|C. fragosus

|Schaff Quarry, Park County, Wyoming.

|

|3 vertebral centra (PU 21174).

|A bowfin.

|

|E. milviaegis

|Montana.{{Cite journal |last1=Murray |first1=Alison M. |last2=Brinkman |first2=Donald B. |last3=DeMar |first3=David G. |last4=Wilson |first4=Gregory P. |date=2020-03-03 |title=Paddlefish and sturgeon (Chondrostei: Acipenseriformes: Polyodontidae and Acipenseridae) from lower Paleocene deposits of Montana, U.S.A. |url=https://doi.org/10.1080/02724634.2020.1775091 |journal=Journal of Vertebrate Paleontology |volume=40 |issue=2 |pages=e1775091 |doi=10.1080/02724634.2020.1775091 |bibcode=2020JVPal..40E5091M |s2cid=222213273 |issn=0272-4634|url-access=subscription }}

|Tullock Member.

|

|A fairly small sturgeon.

|

|P. tuberculata

|Montana.

|Tullock Member.

|3 specimens.

|A paddlefish.

|

|P. sp. indet.

|Powder River Basin.{{Cite journal |last1=Hanley |first1=John H. |last2=Flores |first2=Romeo M. |date=1987 |title=Taphonomy and Paleoecology of Nonmarine Mollusca: Indicators of Alluvial Plain Lacustrine Sedimentation, Upper Part of the Tongue River Member, Fort Union Formation (Paleocene), Northern Powder River Basin, Wyoming and Montana |url=https://www.jstor.org/stable/3514619 |journal=PALAIOS |volume=2 |issue=5 |pages=479–496 |doi=10.2307/3514619 |jstor=3514619 |bibcode=1987Palai...2..479H |issn=0883-1351|url-access=subscription }}

|Tongue River Member.

|8 specimens.

|A sphaeriid.

|

|Powder River Basin.

|Tongue River Member.

|3 specimens.

|A sphaeriid.

|

|P. priscus

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A unionid.

|

|Powder River Basin.

|Tongue River Member.

|Several specimens.

|A unionid.

|

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A unionid.

|

|Powder River Basin.

|Tongue River Member.

|6 specimens.

|A unionid.

|

|Powder River Basin.

|Tongue River Member.

|2 specimens.

|A unionid.

|

|Gen. & sp. indet.

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A sphaeriid.

|

|S. sp. indet.

|Powder River Basin.

|Tongue River Member.

|1 specimen.

|A sphaeriid.

|

|Powder River Basin.

|Tongue River Member.

|Several specimens.

|A sphaeriid.

|

|Gen. & sp. indet.

|Powder River Basin.

|Tongue River Member.

|11 specimens.

|A unionid.

|

|A.? minutus

|Powder River Basin.

|Tongue River Member.

|2 specimens.

|A river limpet.

|

|Powder River Basin.

|Tongue River Member.

|1 specimen.

|A river limpet.

|

|C. n. sp. A

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A clenchiellid.

|

|Powder River Basin.

|Tongue River Member.

|1 specimen.

|A clenchiellid.

|

|Powder River Basin.

|Tongue River Member.

|10 specimens.

|A clenchiellid.

|

|Powder River Basin.

|Tongue River Member.

|30 specimens.

|A clenchiellid.

|

|H. anthonyi

|Powder River Basin.

|Tongue River Member.

|2 specimens.

|A hydrobiid.

|

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A hydrobiid.

|

|Powder River Basin.

|Tongue River Member.

|2 specimens.

|A hydrobiid.

|

|Powder River Basin.

|Tongue River Member.

|Multiple specimens.

|A hydrobiid.

|

|Powder River Basin.

|Tongue River Member.

|1 specimen.

|A hydrobiid.

|

|Powder River Basin.

|Tongue River Member.

|Multiple specimens.

|A hydrobiid.

|

|Powder River Basin.

|Tongue River Member.

|2 specimens.

|A hydrobiid.

|

|L. multistriata

| Powder River Basin.

|Tongue River Member.

|Numerous specimens.

| A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|11 specimens.

|A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|1 specimen.

|A viviparid.

|

|V.? sp. indet.

|Powder River Basin.

|Tongue River Member.

|1 specimen.

|A valvatid.

|

|V. raynoldsanus

|Powder River Basin.

|Tongue River Member.

|Numerous specimens.

|A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|1 specimen.

|A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|17 specimens.

|A viviparid.

|

|Powder River Basin.

|Tongue River Member.

|Multiple specimens.

|A viviparid.

|

|A. hickeyi

|Custer National Forest, Powder River County, Montana.{{Cite journal |last1=Manchester |first1=Steven R. |last2=Foster |first2=Alyssa |last3=Lott |first3=Terry A. |date=2023-05-12 |title=The Paleocene Horse Creek florule, Tongue River Member of the Fort Union Formation, southeastern Montana, USA |url=https://acpa.botany.pl/The-Paleocene-Horse-Creek-florule-Tongue-River-Member-of-the-Fort-Union-Formation,162170,0,2.html |journal=Acta Palaeobotanica |volume=63 |issue=1 |language=english |pages=32–53 |doi=10.35535/acpa-2023-0003 |issn=0001-6594|doi-access=free }}

|Tongue River Member.

|Leaves.

|A horse chestnut.

|

|A. obtrullata

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Fruits.

|A nyssaceaen, may be produced by the same plant as Beringiaphyllum cupanioides.

|

|B. cupanioides

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Leaf (UF 18969-60464).

|A nyssaceaen, may be produced by the same plant as Amersinia obtrullata.

|

|B. serrata

|Mexican Hat locality & Custer National Forest, Powder River County, Montana.

|Lebo Member & Tongue River Member.

|Leaves showing signs of insect damage.

|A nyssaceaen.

|

|C. genetrix

|Mexican Hat locality, Montana.{{Cite journal |last1=Donovan |first1=Michael P. |last2=Wilf |first2=Peter |last3=Labandeira |first3=Conrad C. |last4=Johnson |first4=Kirk R. |last5=Peppe |first5=Daniel J. |date=2014-07-24 |title=Novel Insect Leaf-Mining after the End-Cretaceous Extinction and the Demise of Cretaceous Leaf Miners, Great Plains, USA |journal=PLOS ONE |language=en |volume=9 |issue=7 |pages=e103542 |doi=10.1371/journal.pone.0103542 |issn=1932-6203 |pmc=4110055 |pmid=25058404|bibcode=2014PLoSO...9j3542D |doi-access=free }}

|Lebo Member.

|Leaves showing signs of insect damage.

|A katsura tree.

|

|C. swingii

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Leaves.

|A dogwood.

|

|D. antiqua

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Leaves & fruits.

|A dove tree.

|

|Cf. D. americana

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|A single specimen of sterile foliage (UF 18969-34532).

|A fern.

|

|D. hansonium

|Williston Basin, North Dakota.{{Cite journal |last1=Peppe |first1=Daniel J. |last2=Hickey |first2=Leo J. |date=November 2014 |title=Fort Union Formation Fossil Leaves (Paleocene, Williston Basin, North Dakota, USA) Indicate Evolutionary Relationships Between Paleocene and Eocene Plant Species |url=https://www.researchgate.net/publication/274312501 |journal=Bulletin of the Peabody Museum of Natural History |volume=55 |issue=2 |pages=171–189 |doi=10.3374/014.055.0209 |bibcode=2014BPMNH..55..171P |s2cid=129724520 |issn=0079-032X}}

|Tongue River Member.

|Leaves.

|A dicot.

|

|Williston Basin, North Dakota.

|Ludlow Member.

|Leaves.

|A dicot.

|

|E. pseudopteris

| Sweetwater County, Wyoming.{{Cite journal |last1=Kvaček |first1=Zlatko |last2=Manchester |first2=Steven R. |date=1999 |title=Eostangeria Barthel (Extinct Cycadales) from the Paleogene of Western North America and Europe |url=https://www.researchgate.net/publication/240563782 |journal=International Journal of Plant Sciences |volume=160 |issue=3 |pages=621–629 |doi=10.1086/314152 |bibcode=1999IJPlS.160..621K |s2cid=83978433 |issn=1058-5893}}

|Upper part of the formation.

|Multiple specimens.

| A cycad.

|

|E. sp.

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|A single stem (UF 18969-60476A).

|A horsetail.

|

|"F." artocarpoides

|Mexican Hat locality.

|Lebo Member.

|Leaves with signs of hole feeding and insect mining.

|A fig-tree.

|

|G. europaeus

|Mexican Hat locality.

|Lebo Member.

|Leafy branches.

|A conifer.

|

|J. glabra

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaves with insect damage and probable lepidopteran leaf mines.

|A member of the walnut family.

|

|Species 1

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaf with piercing and sucking marks from insects.

|

|

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaves showing signs of insect damage.

|

|

|M. mikanoides

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Stamen groups.

|A platanaceaen.

|

|M. gracilis

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|A fragmentary leaf (UF 18969-38380).

|A platanaceaen.

|

|Williston Basin, North Dakota.

|Ludlow Member.

|Leaves.

|A platanaceaen.

|

|M. thriviensis

|Williston Basin, North Dakota.

|Ludlow Member.

|Leaves.

|A sabiaceaen.

|

|Williston Basin, North Dakota.

|Tongue River Member.

|Multiple leaves.

|A sabiaceaen.

|

|N. borealis

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Fruit.

|A trochodendrale.

|

|P. macroloba

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaves.

|A nelumbonaceaen.

|

|P. crassifolia

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaves.

|A nymphaeaceaen.

|

|P. demoresii

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Leaves.

|

|

|P. raynoldsii

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaves showing signs of insect damage.

|A plane-tree.

|

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Leaves.

|A plane-tree.

|

|P. manningii

|Mexican Hat locality, Montana.

|Lebo Member.

|Fruits.

|A member of the walnut family.

|

|"P". nebrascensis

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaves showing signs of insect damage.

|A poplar.

|

|P. verrucosa

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Fruits.

|A rutaceaen.

|

|T. olrikii

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|

|A cypress tree.

|

|cf. T. aureavallis

|Mexican Hat locality, Montana.

|Lebo Member.

|Leaf with a gall at the intersection of primary and secondary veins.

|A theaceaen.

|

|Williston Basin, North Dakota.

|Ludlow & Tongue River Members.

|Leaves.

|A theaceaen.

|

|T. genetrix

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|A few leaves.

|A saxifrage.

|

|U. microphylla

|Custer National Forest, Powder River County, Montana.

|Tongue River Member.

|Leaves.

|An ulmaceaen.

|

|Z. flabella

|Mexican Hat locality, Montana & Custer National Forest, Powder River County, Montana.

|Lebo Member & Tongue River Member.

|Leaves showing signs of insect damage.

|A trochodendrale.

|