This list of the Cenozoic life of Montana contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Montana and are between 66 million and 10,000 years of age.
A
Abies †Abies alvordensis †Abies concoloroides †Abies laticarpa Acer †Acer bendirei †Acer bolanderi †Acer glabroides †Acer minor †Acer newberryi †Acer oregonianum †Acer scottiae †Acer silberlingi †Acheronodon †Acheronodon garbani – type locality for species Acipenser †Acmeodon †Acritohippus †Acritohippus isonesus †Acritoparamys †Acritoparamys atavus – type locality for species †Actinodonta †Adjidaumo †Adjidaumo intermedius – or unidentified comparable form †Adjidaumo minimus – type locality for species †Adunator †Adunator ladae †Aelurodon †Aelurodon ferox – or unidentified comparable form †Aelurodon montanensis – type locality for species †Aepycamelus †Aepycamelus stocki †Agnotocastor †Agnotocastor montanus †Agriochoerus †Agriochoerus maximus – type locality for species †Agriochoerus minimus †Agrostis †Agrostis primaeva †Ailanthus †Ailanthus americana Alangium †Alangium thomae †Alepidophora †Alepidophora maxima – type locality for species †Alismaphyllites †Alismaphyllites grandifolius Alnus †Alnus jarbidgana †Alnus protomaximowiczii †Alnus relata †Alphagaulus †Alphagaulus pristinus †Amebelodon †Amebelodon floridanus – or unidentified comparable form Amelanchier †Amelanchier couleeana †Amelanchier covea †Amentotaxus †Amentotaxus campbelli Amia †Amia fragosa †Amia uintaensis †Ampelopsis †Ampelopsis acerifolia †Amphechinus †Amphechinus horncloudi †Amphicyon †Amphicyon riggsi – type locality for species †Amynodon †Amynodon advenus – or unidentified comparable form †Amyzon †Anacodon †Anacodon ursidens – or unidentified comparable form Anas †Anas platyrhynchos – or unidentified comparable form †Ancenycteris †Ancenycteris rasmusseni †Anconodon †Anconodon cochranensis †Anconodon gidleyi – type locality for species †Anemia †Anemia elongata †Angustidens †Angustidens vireti – or unidentified comparable form †Anisonchus †Anisonchus oligistus †Anisonchus sectorius †Ansomys †Ansomys hepburnensis – type locality for species †Ansomys nexodens †Antholithes †Antholithes asterias – type locality for species †Antholithes botryanthera – type locality for species †Antholithes divaricanthera – type locality for species †Antholithes explodens – type locality for species †Antholithes glandulifera – type locality for species †Antholithes onagracioides – type locality for species †Antholithes tropaeoloides – type locality for species †Antholithes tulipoidea – type locality for species †Antholithes umbelloidea – type locality for species †Antholithes urnanthera – type locality for species †Antholithes zygomorpha – type locality for species Antilocapra – or unidentified comparable form †Antilocapra americana †Aphelops †Aphronorus †Aphronorus fraudator – type locality for species †Aphronorus orieli †Apternodus †Apternodus baladontus – type locality for species †Apternodus mediaevus – type locality for species †Araceaeites †Araucaria †Araucaria longifolia †Archaeocyon †Archaeocyon leptodus †Archaeohippus †Archaeolagus †Archisyrphus – type locality for genus †Archisyrphus opacus – type locality for species †Arctocyon †Arctocyon ferox †Arctodus †Arctodus simus †Arctostaphylos †Arctostaphylos cuneata †Ardynomys †Ardynomys occidentalis – type locality for species †Arretotherium †Arretotherium acridens – type locality for species Arundo †Arundo pseudogoepperti Arvicola †Arvicola richardsonii †aspera †aspera aspera †Astronium †Astronium truncatum †Athyana †Athyana haydenii †Atoposemys †Atoposemys entopteros †Aulolithomys †Aulolithomys bounites – type locality for species †Averrhoites †Averrhoites affinis †Avunculus †Avunculus didelphodonti – type locality for species †Axestemys †Axestemys montinsana Azolla †Azolla elegans – type locality for species †Azolla fragilis – type locality for species †Azolla velus
B
†Baioconodon †Baioconodon denverensis – or unidentified comparable form †Baioconodon engdahli – type locality for species †Baioconodon nordicus – type locality for species †Baiotomeus †Baiotomeus douglassi †Baiotomeus lamberti – type locality for species †Bathygenys †Bathygenys alpha – type locality for species †Berberis †Berberis acanthoides Berchemia †Berchemia huanoides †Beringiaphyllum †Beringiaphyllum cupanioides †Bessoecetor †Bessoecetor septentrionalis Betula †Betula fairii †Betula stevensoni †Betula thor †Betula vera Bibio – or unidentified related form Bison †Bison bison †Bison latifrons – or unidentified comparable form †Bisonalveus †Bisonalveus browni †Blastomeryx †Blastomeryx gemmifer †Bootherium †Borealosuchus †Borealosuchus sternbergii †Brachychampsa †Brachycrus †Brachycrus laticeps †Brachyerix †Brachyerix incertis †Brachyrhynchocyon †Brachyrhynchocyon dodgei †Brachyrhynchocyon montanus – type locality for species †Browniea †Browniea serrata
C
†Caesalpinites †Caesalpinites acuminatus †Caesalpinites coloradicus †Calycites †Calycites hexaphylla †Camelops †Camelops minidokae †Camponotites †Canavalia †Canavalia eocenica Canis †Canis latrans †Canis lupus †Canna †Canna flaccidafolia †Carcinodon †Carcinodon aquilonius †Cardiospermum †Cardiospermum terminalis Carpinus †Carpinus fraterna †Carpinus lanceolata †Carpites †Carpites amygdaloides – type locality for species †Carpites carumcarvi – type locality for species †Carpites eludens – type locality for species †Carpites gracilens – type locality for species †Carpites paniculatus – type locality for species †Carpites polygonoides †Carpites pruniformis – type locality for species †Carpites racemosus – type locality for species †Carpites verrucosus †Carpodaptes †Carpodaptes hazelae – type locality for species †Carpodaptes jepseni – tentative report †Carpolestes †Carpolestes nigridens – type locality for species Carya †Carya antiquorum †Carya libbeyi †Cassia †Cassia fayettensis †Cassia hesperia †Cassia reticuloides Castanea †Castanea dolichophylla †Castanea intermedia †Castanea miomollissima †Castanea spokanensis †Castanea spolanensis Castor †Castor californicus †Castor canadensis †Catalpa †Catalpa rubyensis – type locality for species †Catopsalis †Catopsalis alexanderi †Catopsalis waddleae Ceanothus †Ceanothus prespinosus †Ceanothus variabilis Cedrela †Cedrela lancifolia †Cedrela pteraformis †Celastrus †Celastrus typicus Celtis †Celtis aspera †Celtis aspera (Newberry) †Celtis chaneyi †Celtis kansana †Celtis mccoshii †Celtis peracuminata †Centetodon †Centetodon kuenzii – type locality for species †Centetodon magnus Cercidiphyllum †Cercidiphyllum arcticum †Cercidiphyllum articum †Cercidiphyllum crenatum †Cercidiphyllum elongatum †Cercidiphyllum genetrix Cercis †Cercis parvifolia †Cercis spokanensis †Cercocarpus †Cercocarpus antiquus †Cercocarpus beaannae †Cercocarpus myricaefolius †Chadrolagus †Chadrolagus emryi †Chaetoptelea †Chaetoptelea microphylla †Chamaecyparis †Chamaecyparis linguaefolia †Chamops †Chamops segnis – or unidentified comparable form †Champsosaurus †Chiromyoides †Chiromyoides potior †Chisternon †Chisternon interpositum – type locality for species †Chriacus †Chriacus baldwini †Chriacus calenancus †Chriacus pelvidens †Chriacus punitor †Chthonophis – type locality for genus †Chthonophis subterraneus – type locality for species †Cimexomys †Cimexomys minor – type locality for species †Cimolestes †Cimolestes incisus Cinnamomum †Cinnamomum sezannense Cissus †Cissus marginata †Claenodon †Claenodon montanensis Clematis †Clematis ellensburgensis Cocculus †Cocculus heteromorpha †Colodon †Colodon cingulatus †Colodon kayi – type locality for species †Colodon woodi – or unidentified comparable form †Colpoclaenus †Colpoclaenus keeferi – tentative report †Colpoclaenus procyonoides – or unidentified comparable form †Colubrina †Colubrina asiatica – or unidentified comparable form †Colubrina preelliptica †Compsemys †Compsemys victa †Coniferites †Coniferites conicus – type locality for species †Coniferites ovatus – type locality for species †Coniferites strobiliformis – type locality for species †Coniophis – or unidentified comparable form †Coniophis precedens †Contogenys †Contogenys ekalakaensis – type locality for species †Contogenys sloani †Conzattia †Conzattia coriacea †Copedelphys †Copedelphys stevensoni – or unidentified comparable form †Copedelphys titanelix – type locality for species †Copemys †Copemys lindsayi – type locality for species †Coriphagus †Coriphagus montanus – type locality for species Cornus †Cornus cornella †Cornus hyperborea †Cornus ovalis †Corylus †Corylus insignis †Coryphodon †Coryphodon proterus – type locality for species †Cosmocomoidea †Cosmocomoidea greenwalti – type locality for species †Cosmocomoidea kootenai – type locality for species †Cosmocomoidea rasnitsyni – type locality for species †Cosoryx – tentative report Crataegus †Crataegus elwyni †Crataegus pacifica †Credneria †Credneria daturaefolia Crematogaster †Crematogaster aurora – type locality for species †Crustulus – type locality for genus †Crustulus fontanus – type locality for species †Cryptoryctes – type locality for genus †Cryptoryctes kayi – type locality for species Culiseta †Culiseta kishenehn – type locality for species †Culiseta lemniscata – type locality for species †Cupidinimus †Cupidinimus halli – type locality for species †Cyclurus †Cyclurus fragosus †Cylindrodon – type locality for genus †Cylindrodon fontis – type locality for species †Cynodesmus †Cynodesmus thooides – type locality for species Cynomys †Cynomys ludovicianus
D
†Dalbergia †Dalbergia retusa †Daphoenictis – or unidentified comparable form †Davidia †Davidia antiqua †Davispia – type locality for genus †Davispia bearcreekensis – type locality for species †Derrisemys – type locality for genus †Derrisemys sterea – type locality for species †Desmatochoerus †Desmatochoerus hatcheri – type locality for species †Desmatolagus – tentative report †Deuterogonodon †Deuterogonodon montanus – type locality for species †Diceratherium †Diceratherium annectens †Diceratherium armatum †Diceratherium radtkei – type locality for species †Didymictis †Dillerlemur †Dillerlemur pagei – type locality for species †Dinictis †Dinohippus †Dioctria – tentative report †Dioctria jamesi – type locality for species †Diospyros †Diospyros oregoniana †Diphysa †Diphysa presuberosa †Diplodipelta – type locality for genus †Diplodipelta reniptera Dipteronia †Dipteronia insignis †Dissacus †Dixella †Dixella curvistyla – type locality for species †Dixella eomarginata – type locality for species †Dixella intacta – type locality for species †Dixella spinilobata – type locality for species Dolichoderus †Dolichoderus dlusskyi – type locality for species †Domnina †Domnina gradata – or unidentified comparable form †Domnina thompsoni – type locality for species †Domninoides †Dorraletes †Dorraletes diminutivus †Douglassciurus †Douglassciurus jeffersoni – type locality for species †Downsimus †Dromomeryx †Dromomeryx borealis †Dryinoides – type locality for genus †Dryinoides oxyrhachis – type locality for species Dryopteris †Dryopteris lakesi †Dryopteris serrata
E
†Ectocion †Ectocion cedrus †Ectocion collinus †Ectoganus †Ectoganus lobdelli †Ectypodus †Ectypodus aphronorus – type locality for species †Ectypodus laytoni – or unidentified comparable form †Ectypodus lovei †Ectypodus powelli – or unidentified comparable form †Ectypodus szalayi – type locality for species †Ellipsodon †Ellipsodon lemuroides †Elomeryx – tentative report †Elphidotarsius