This list of the Cenozoic life of Wyoming contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Wyoming and are between 66 million and 10,000 years of age.

A

†Aaptoryctes †Aaptoryctes ivyi †Absarokius †Absarokius abbotti †Absarokius gazini – type locality for species †Absarokius metoecus – type locality for species †Abuta – or unidentified related form †Acacia †Acacia lamarensis †Acacia macrosperma †Acacia wardii †Acarictis †Acarictis ryani – type locality for species Accipiter Accipiter gentilis †Accipiter striatus Acer †Acer lesquereuxi †Acer newberryi †Acer silberlingii †Acer vivarium †Aceroryctes – type locality for genus †Aceroryctes dulcis – type locality for species †Achaenodon †Achaenodon insolens – type locality for species †Achaenodon robustus – type locality for species †Acidomomys – type locality for genus †Acidomomys hebeticus – type locality for species †Acmeodon †Acmeodon secans †Acocephalus †Acocephalus adae – type locality for species †Acritoparamys †Acritoparamys atavus †Acritoparamys atwateri †Acritoparamys francesi †Acritoparamys wyomingensis Acrostichum †Acrostichum hesperium †Adilophontes – type locality for genus †Adilophontes brachykolos – type locality for species †Adjidaumo †Adjidaumo burkei – tentative report †Adjidaumo craigi – or unidentified comparable form †Adjidaumo minimus †Adocus †Adunator †Adunator fredericki †Adunator ladae †Adunator martinezi Aegialia †Aegialia rupta – type locality for species Aegolius †Aegolius acadicus Aegolius funereus †Aepycamelus †Aerugoamnis – type locality for genus †Aerugoamnis paulus – type locality for species †Aesculus †Aesculus antiquorum †Aesculus hickeyi †Afairiguana – type locality for genus †Afairiguana avius – type locality for species †Ageina †Ageina tobieni †Ageitodendron †Ageitodendron matthewi Agelaius †Agelaius phoeniceus †Agnotocastor †Agnotocastor galushai – type locality for species †Agriochoerus †Agriochoerus maximus †Agriochoerus minimus – or unidentified comparable form Ailanthus †Ailanthus lesquereuxi †Alagomys †Alagomys russelli – type locality for species †Alastor †Alastor solidescens – type locality for species †Albertanella – or unidentified comparable form †Albertanella minuta Alces †Alces alces †Aletodon †Aletodon conardae – type locality for species †Aletodon gunnelli – type locality for species †Aletodon quadravus †Aletomeryx †Aletomeryx gracilis †Aletornis – type locality for genus †Aletornis bellus – type locality for species †Aletornis gracilis – type locality for species †Aletornis nobilis – type locality for species †Aletornis pernix – type locality for species †Aletornis venustus – type locality for species Aleurites †Aleurites glandulosa †Alismaphyllites †Alismaphyllites grandifolius †Allantodiopsis †Allantoidiopsis erosa †Allognathosuchus †Allognathosuchus heterodon †Allognathosuchus polyodon †Allognathosuchus wartheni – type locality for species †Allomys †Allomys cristabrevis †Allophylus †Allophylus flexifolia Alnus †Alphagaulus †Alphagaulus vetus †Alticonus †Alticonus gazini †Alveojunctus †Alveojunctus minutus †Alveugena †Alveugena carbonensis – type locality for species †Amaramnis †Amaramnis gregoryi – type locality for species †Ambloctonus †Ambloctonus major †Ambloctonus priscus – or unidentified comparable form †Ambloctonus sinosus †Ameiseophis †Ameiseophis robinsoni – type locality for species †Amelotabes – type locality for genus †Amelotabes simpsoni – type locality for species Amentotaxus †Amentotaxus campbelli Amia †Amia fragosa †Amitabha – type locality for genus †Amitabha urbsinterdictensis – type locality for species †Ampelopsis †Ampelopsis acerifolia †Amphechinus †Amphechinus ellicottae – type locality for species †Amphigyion †Amphigyion straitae †Amphilemur †Amphiplaga Amphiuma †Amphiuma jepseni – type locality for species †Ampliconus †Ampliconus antoni – type locality for species Amyda †Amyda egregia – type locality for species †Amyda exquisita – type locality for species †Amyda mira – type locality for species †Amynodon †Amynodon advenus †Anacardites †Anacardites schinoloxus Anaclinia – tentative report †Anacodon †Anacodon nexus – type locality for species †Anacodon ursidens Anamirta – or unidentified comparable form †Anamirta milleri †Anaptomorphus †Anaptomorphus aemulus – type locality for species †Anaptomorphus westi – type locality for species Anas †Anas acuta Anas clypeata †Anas crecca Anas platyrhynchos †Anas schneideri – type locality for species †Anatella †Anatella tacita – type locality for species †Anconodon †Anconodon cochranensis †Anconodon gidleyi †Anemia †Anemia elongata †Anemorhysis †Anemorhysis natronensis – type locality for species †Anemorhysis pattersoni – type locality for species †Anemorhysis sublettensis – type locality for species †Anemorhysis wortmani – type locality for species †Anilioides †Anilioides nebraskensis †Anisonchus †Anisonchus sectorius †Anisonchus willeyi – type locality for species †Ankylodon †Ankylodon annectens – or unidentified comparable form †Anniealexandria – type locality for genus †Anniealexandria gansi – type locality for species Anobium †Anobium deceptum – type locality for species †Anobium lignitum – type locality for species †Anobium ovale – type locality for species †Anolbanolis – type locality for genus †Anolbanolis banalis – type locality for species †Anolbanolis geminus – type locality for species †Anomoemys †Anomoemys lewisi †Anosteira †Anosteira ornata †Anosteira radulina – type locality for species †Anosteira trionychoides †Antherophagus †Antherophagus priscus – type locality for species Anthonomus †Anthonomus revictus – type locality for species †Anthonomus soporus – type locality for species †Antiacodon †Antiacodon pygmaeus – type locality for species †Antiacodon vanvaleni – type locality for species †Antiacodon venustus – type locality for species Antilocapra †Antilocapra americana Apalone †Apalone extensa – type locality for species †Apalone heteroglypta – type locality for species †Apalone postera – type locality for species †Apatemys †Apatemys bellulus – type locality for species †Apatemys bellus †Apatemys chardini – or unidentified comparable form †Apatemys hendryi – type locality for species †Apatemys rodens †Aphaena †Aphaena rotundipennis – type locality for species †Apheliscus – type locality for genus †Apheliscus chydaeus – type locality for species †Apheliscus insidiosus †Apheliscus nitidus †Apheliscus wapitiensis – type locality for species †Aphelops †Aphelops megalodus †Aphronorus †Aphronorus fraudator †Aphronorus orieli – type locality for species †Aphronorus ratatoski – type locality for species †Apodosauriscus – type locality for genus †Apodosauriscus minutus – type locality for species †Apodosauriscus thermophilus – type locality for species †Apriculus †Apriculus praeteritus – type locality for species †Apternodus †Apternodus brevirostris – type locality for species †Apternodus dasophylakas – type locality for species †Apternodus gregoryi – type locality for species †Apternodus iliffensis †Apternodus major – type locality for species Aquila †Aquila antiqua – type locality for species Aquila chrysaetos Aralia †Aralia notata †Aralia serrulata †Aralia wrightii †Araliophyllum †Araliophyllum quina Araneus †Arapahovius †Arapahovius advena – type locality for species †Arapahovius gazini – type locality for species Araucaria †Araucaria longifolia †Archaeocyon †Archaeocyon falkenbachi †Archaeocyon leptodus †Archaeolagus †Archaeolagus emeraldensis †Archaeotherium †Archaeotherium minimus †Archaeotherium mortoni †Archaeotherium palustris – type locality for species †Archaerhineura – type locality for genus †Archaerhineura mephitis – type locality for species Arcoa †Arcoa lindgreni – type locality for species †Arctocyon †Arctocyon ferox †Arctocyon mumak †Arctodontomys †Arctodontomys nuptus †Arctodontomys simplicidens †Arctodontomys wilsoni – type locality for species †Arctodus †Arctodus simus †Arctostaphylos †Arctostaphylos elliptica †Arctostylops †Arctostylops steini †Arecipites †Arecipites tenuiexinous †Arenahippus †Arenahippus aemulor – type locality for species †Arenahippus pernix – type locality for species †Arfia †Arfia junnei †Arfia opisthotoma †Arfia shoshoniensis †Arfia zele – type locality for species Aristolochia †Aristolochia mortua †Armintodelphys †Armintodelphys blacki †Armintodelphys dawsoni †Armintomys †Armintomys tullbergi †Arpadosaurus – type locality for genus †Arpadosaurus gazinorum – type locality for species †Arpadosaurus sepulchralis – type locality for species †Artimonius †Artimonius nocerai †Artimonius witteri Artocarpus – tentative report †Artocarpus quercoides †Asarkina †Asarkina quadrata – type locality for species †Asiabradypus – or unidentified comparable form Asio †Asio flammeus Asio otus †Asplenium †Asplenium delicatula †Asplenium eoligniticum †Asplenium eolignitum †Asplenium erosum †Asplenium iddingsi †Asplenium remotidens †Astephus †Asterotrygon †Asterotrygon maloneyi Astronium †Astronium truncatum †Athyana †Athyana balli †Aulolithomys †Aulolithomys bounites †Aulolithomys vexilliames – type locality for species †Auroralestes †Auroralestes simpsoni †Auxontodon †Averrhoites †Averrhoites affinis †Avunculus †Avunculus didelphodonti – or unidentified comparable form †Axestemys – type locality for genus †Axestemys byssina – type locality for species †Axestemys cerevisia – type locality for species †Axestemys salebrosa – type locality for species †Axestemys uintaensis – type locality for species †Aycrossia †Aycrossia lovei Aythya Aythya collaris Azolla †Azolla cretacea †Azygonyx †Azygonyx ancylion – type locality for species †Azygonyx grangeri †Azygonyx xenicus – type locality for species

B

†Babibasiliscus – type locality for genus †Babibasiliscus alxi – type locality for species †Baena †Baena arenosa – type locality for species †Bahndwivici – type locality for genus †Bahndwivici ammoskius – type locality for species †Baioconodon †Baioconodon denverensis – or unidentified comparable form †Baioconodon middletoni – type locality for species †Baioconodon nordicus †Baioconodon wovokae †Baiotomeus †Baiotomeus douglassi †Baiotomeus lamberti †Baltemys – type locality for genus †Baltemys staurogastros – type locality for species †Baptemys †Baptemys wyomingensis – type locality for species †Barbouromeryx – or unidentified comparable form †Barylambda †Barylambda churchilli – type locality for species †Barylambda faberi †Bathornis †Bathornis fricki – type locality for species †Bathygenys †Bathygenys alpha †Bathygenys hedlundae †Bathyopsis †Bathyopsis fissidens †Batodonoides †Batodonoides vanhouteni – type locality for species †Batrachosauroides – tentative report Bauhinia †Bauhinia wyomingana †Bauhinia wyomingiana †Beilschmiedia †Beilschmiedia eocenica †Berchemiopsis †Berchemiopsis paucidentata †Beringiaphyllum †Beringiaphyllum cupanioides †Berosus †Berosus sexstriatus – type locality for species †Berosus tenuis – type locality for species †Bessoecetor †Bessoecetor septentrionalis Betula †Betula iddingsi †Betula stevensoni †Betula stevensonii Biomphalaria Bison †Bison bison †Bisonalveus – type locality for genus †Bisonalveus browni – type locality for species †Bisonalveus holtzmani – type locality for species †Blechnum †Blechnum anceps Bledius †Bledius adamus – type locality for species †Bledius faecorum – type locality for species †Blickomylus †Blickomylus galushai †Boavus – type locality for genus †Boavus brevis – type locality for species †Boavus idelmani – type locality for species