This list of the Paleozoic 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 538.8 and 252.17 million years of age.
A
†Acanthopecten
†Acanthopecten alatus
†Acanthopecten coloradoensis
†Acanthopecten delawarensis – or unidentified comparable form
†Acanthoscorpio – type locality for genus
†Acanthoscorpio mucronatus – type locality for species
†Acanthracospirifer
†Acanthracospirifer occiduus – tentative report
†Acanthracospirifer shawi
†Acondylacanthus
†Acondylacanthus browni – type locality for species
†Acontiodus
†Acratia – tentative report
†Acratia disjuncta
†Actinoceras
†Actinocoelia
†Actinocoelia maeandrina
†Acuticarpus
†Acuticarpus delticus
†Acuticarpus republicensis – type locality for species
†Adetognathodus
†Adetognathodus gigantea – or unidentified comparable form
†Agassizodus
†Agassizodus variabilis
†Agnostogonus
†Agnostogonus incognitus – or unidentified comparable form
†Allocryptaspis
†Allocryptaspis ellipticus
†Allocryptaspis flabelliformis
†Allumettoceras
†Alokistocare
†Amphiscapha
†Amphiscapha calix – type locality for species
†Amphissites
†Amphissites robertsi
†Amplexus
†Ananias
†Ananias nevadensis – or unidentified related form
†Anarthraspis
†Anarthraspis chamberlini
†Anarthraspis montanus
†Ancistriodus
†Ancistriodus multisectus
†Anematina
†Angulotreta
†Anidanthus
†Ankoura
†Anthracospirifer
†Anthracospirifer curvilateralis
†Anthracospirifer occidus
†Anthracospirifer occiduus
†Anthracospirifer rawlinsensis
†Anthracospirifer shawi
†Anthracospirifer welleri
†Antiquatonia
†Antiquatonia coloradoensis – or unidentified comparable form
†Antiquatonia sulcatus – or unidentified comparable form
†Antracospirifer
†Antracospirifer occidus
†Antracospirifer rawlinsensis
†Antracospirifer shawi
†Antracospirifer welleri
†Apachella
†Apachella boydi – type locality for species
†Apachella capertoni
†Apachella franciscana
†Apachella pseudostrigillata
†Apachella turbiniformis
†Aphanaia
†Aphanaia erectum – type locality for species
†Aphelaspis
†Aphelaspis walcotti
†Apiculatisporites
†Apiculatisporites microconus
†Apiculiretusispora
†Apiculiretusispora plicata
†Apiculiretusispora spicula
†Arapahoia
†Archaediscus
†Archaediscus krestovnikovi – or unidentified loosely related form
†Archaeocidaris
†Arctacanthus
†Arctacanthus wyomingensis – type locality for species
†Asphaltina
†Astartella
†Astartella aueri – type locality for species
†Astartella concentrica
†Asteroarchaediscus
†Asteroarchaediscus bachkiricus
†Astraspis
†Astraspis desiderata
†Aviculopecten
†Aviculopecten basilicus – or unidentified comparable form
†Aviculopecten girtyi
†Aviculopecten gravidus
†Aviculopecten gryphus
†Aviculopecten kaibabensis – or unidentified comparable form
†Aviculopinna
B
†Babylonites
Bairdia
†Bairdia contracta
†Bairdia delicata
†Bairdia nasuta
†Bakevellia – tentative report
†Balantoides
†Balantoides quadrilobatus
†Baltagnostus
†Baltagnostus wyomingensis – type locality for species
†Barytichisma
†Barytichisma amsdenense
†Batacanthus
†Batacanthus gigas – type locality for species
†Bathymyonia
†Bathymyonia nevadensis
†Batostoma
†Bayfieldia
†Bayfieldia bindosa
†Bayfieldia simata – or unidentified comparable form
†Baylea
†Baylea delawarensis
†Bellerophon
†Bellerophon deflectus – or unidentified comparable form