List of the Paleozoic life of Alaska

This list of the Paleozoic life of Alaska contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Alaska and are between 538.8 and 252.17 million years of age.

A

†Abadehella
†Acanthocladia
†Acanthopecten
- †Acanthopecten carbonifer – or unidentified related form
- †Acanthopecten delawarensis – or unidentified related form
†Acanthophyllum
Fossil of the Silurian-Middle Devonian trilobite Acanthopyge
†Acanthopyge
†Acervularia
†Aclisina – tentative report
†Acmarhachis
- †Acmarhachis acutus
†Acrosaccus
- †Acrosaccus shuleri – or unidentified comparable form
†Acrothele
†Actinocystis – tentative report
- †Actinocystis perfecta – or unidentified comparable form
†Actinostroma
†Adolfispirifer
- †Adolfispirifer sanjuanensis
†Afilasma
†Agathammina
†Agetolites
†Aglaoglypta
Fossilized shell of the Middle Devonian ammonoid cephalopod, Agoniatites
†Agoniatites – tentative report
†Akidograptus
- †Akidograptus acuminatus
†Alaskacirrus – type locality for genus
- †Alaskacirrus bandeli – type locality for species
†Alaskaspongia
- †Alaskaspongia nana
†Alaskaspongiella – type locality for genus
- †Alaskaspongiella laminosa – type locality for species
†Alaskiella – type locality for genus
- †Alaskiella medfraensis – type locality for species
†Alaskodiscus
- †Alaskodiscus donensis
†Alaskospira
- †Alaskospira dunbari
†Alaskozygopleura
- †Alaskozygopleura crassicostata
†Albaillella
- †Albaillella cartalla – or unidentified related form
†Aldanispirifer
†Allonema
- †Allonema silurica
†Allorhynchoides – type locality for genus
- †Allorhynchoides kirki – type locality for species
†Alokistocare – or unidentified comparable form
- †Alokistocare lobatum
†Alveolitella
†Alveolites
†Amblysiphonella
†Ambocoelia
- †Ambocoelia planiconvexa – or unidentified related form
- †Ambocoelia umbonata
†Amoenospirifer
- †Amoenospirifer angustiplicata
- †Amoenospirifer sulcalplicata
†Amphipora
†Amplexograptus
- †Amplexograptus confertus – or unidentified comparable form
- †Amplexograptus perexcavatus – or unidentified comparable form
†Amplexoides
†Amplexus
†Anatrypa
- †Anatrypa alinensis – or unidentified related form
- †Anatrypa khavae – or unidentified comparable form
†Ancillotoechia
- †Ancillotoechia antiquaria
†Ancyrognathus
- †Ancyrognathus amana – or unidentified comparable form
†Anematina
- †Anematina rockymontanum
†Anemonaria
- †Anemonaria pseudohorrida
†Angullongia
- †Angullongia minuta
†Anidanthus
†Anisopleurella
- †Anisopleurella tricostata – type locality for species
†Anisotrypa – tentative report
†Anomalograptus
†Anomphalus – tentative report
†Anopolenus
- †Anopolenus henrici
†Anoptambonites
- †Anoptambonites grayae
- †Anoptambonites pulchra
†Antherosalpinx
†Anthraconeilo – tentative report
†Aparchitella – tentative report
†Aphelognathus
- †Aphelognathus divergens – or unidentified related form
†Apheoorthis
†Aphrosalpinx
- †Aphrosalpinx nana – type locality for species
- †Aphrosalpinx textilis
†Aphyllum
†Archaediscus
†Archeocidaris – tentative report
†Arctitreta
- †Arctitreta kempei – or unidentified comparable form
†Arctozone – type locality for genus
- †Arctozone cooki – type locality for species
†Arjamannia
- †Arjamannia thraivensis – or unidentified related form
†Aseptirhynchia
- †Aseptirhynchia glabrata
†Asgardaspira
- †Asgardaspira gerulus – type locality for species
†Astralites
- †Astralites gamblei – type locality for species
†Athabaskiella
- †Athabaskiella ardis – type locality for species
†Athyris
- †Athyris lamellosa – or unidentified related form
†Atomodesma – tentative report
Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa
†Atrypa
- †Atrypa hystrix
- †Atrypa reticularis
†Atrypella
- †Atrypella borealis
- †Atrypella scheii
- †Atrypella tenuis
†Atrypoidea
- †Atrypoidea scheii
†Attenuatella
†Aulocystis
†Aulopora
†Australonema
†Australophyllum
Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten
†Aviculopecten
- †Aviculopecten chesterensis – tentative report
- †Aviculopecten delawarensis – or unidentified related form
- †Aviculopecten edwardsi – or unidentified related form
- †Aviculopecten fasciculatus – or unidentified related form
- †Aviculopecten hardinensis – or unidentified related form
- †Aviculopecten mccoyi – or unidentified related form
- †Aviculopecten montpelierensis – or unidentified related form
- †Aviculopecten occidentalis – or unidentified related form
- †Aviculopecten similis – or unidentified related form
† Avonia – tentative report

B

†Bailiaspis
- †Bailiaspis picta
Bairdia
†Balbinipleura
- †Balbinipleura krawczynskii – type locality for species
†Barocospira
- †Barocospira cindiprellerae – type locality for species
†Bathyuriscidella
- †Bathyuriscidella socialis
†Bathyuriscus
- †Bathyuriscus punctatus – type locality for species
†Batostomella
†Belemnites – tentative report
Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon
†Bellerophon
- †Bellerophon chapmani
- †Bellerophon livengoodensis
- †Bellerophon spergensis – or unidentified related form
†Belodina
†Belowea
- †Belowea variabilis
†Bembexia – tentative report
- †Bembexia inumbilicata – type locality for species
†Bensbergia
- †Bensbergia subcostata – or unidentified related form
†Beraunia
- †Beraunia bifrons
- †Beraunia bohemica
†Betaneospirifer
- †Betaneospirifer marcoui – or unidentified related form
†Beyrichia
- †Beyrichia churkini
†Bicarinatina
- †Bicarinatina kongakutensis – type locality for species
†Bighornia
†Bimuria
- †Bimuria gilbertella
†Blasispirifer
- †Blasispirifer blasii – or unidentified related form
†Bohemicardia
- †Bohemicardia bohemica – or unidentified comparable form
†Bolaspidella
- †Bolaspidella wellsvillensis
†Bothrodendron
- †Bothrodendron kiltorkense
†Boucotspira
- †Boucotspira carinifer
†Brachylasma – tentative report
†Brachymetopus
- †Brachymetopus pseudometopina
†Brachyprion
†Brachythyrina
- †Brachythyrina rectangula – or unidentified related form
†Brachythyris
- †Brachythyris subcardiformis – or unidentified related form
- †Brachythyris subcardiiformis – or unidentified related form
- †Brachythyris suborbicularis – or unidentified related form
- †Brachythyris ufensis – or unidentified related form
†Breviphyllum
- †Breviphyllum lindstromi – or unidentified comparable form
†Briscoia – tentative report
†Bronteus
†Brooksina
- †Brooksina alaskensis
†Bruntonia
- †Bruntonia granulifera
†Bucanopsis
- †Bucanopsis volgulica – or unidentified related form
†Buechelia
- †Buechelia nodosa
†Bulimorpha
†Bulimorphia
- †Bulimorphia peracuta – or unidentified related form
†Buthrotrephis – tentative report

C

†Calapoecia
†Calceola
- †Calceola sandalina – or unidentified comparable form
†Callaiapsida
- †Callaiapsida arctica
- †Callaiapsida kekuensis – type locality for species
- †Callaiapsida pentameroides – or unidentified related form
†Calliprotonia – tentative report
†Callistadia
†Callograptus
†Callositella – type locality for genus
- †Callositella cheeneetnukensis – type locality for species
†Callospiriferina
- †Callospiriferina pinguis
†Calymene
- Fossil of the Silurian trilobite Calymene blumenbachii
  †Calymene blumenbachii
- †Calymene iladon
†Camarotoechia
- †Camarotoechia billingsi – or unidentified comparable form
- †Camarotoechia duplicata – tentative report
- †Camarotoechia winiskensis – or unidentified comparable form
†Campophyllum – tentative report
†Cancrinella
- †Cancrinella cancrini – or unidentified related form
- †Cancrinella cancriniformis – or unidentified related form
- †Cancrinella koninckiana – or unidentified related form
- †Cancrinella tenuissima
†Caneyella – tentative report
†Capellinia
Capulus
†Cardiomorpha – tentative report
†Carinatina
†Caruthia – type locality for genus
- †Caruthia borealis – type locality for species
†Caryocaris
†Catazyga
Fossil of the Ordovician-Silurian tabulate coral Catenipora
†Catenipora
- †Catenipora jacovikii – or unidentified comparable form
- †Catenipora robustus – or unidentified comparable form
- †Catenipora rubra – or unidentified comparable form
†Cedaria
†Centronella
- †Centronella navicella – or unidentified comparable form
†Ceratiacaris
†Ceratopea
- †Ceratopea medfraensis – type locality for species
†Cernuolimbus
- †Cernuolimbus longifrons
†Chaetetes
- †Chaetetes milleporaceous
†Chaetetipora
- †Chaetetipora ellesmerensis – or unidentified comparable form
†Chaoiella
- †Chaoiella gruenewaldti – or unidentified related form
†Chapinella – type locality for genus
- †Chapinella bucareliensis – type locality for species
†Charactophyllum
†Cheeneetnukia – type locality for genus
- †Cheeneetnukia frydai – type locality for species
†Cheilocephalus
- †Cheilocephalus expansus – type locality for species
†Cheiropyge
- †Cheiropyge himalayensis
Fossil of the Cambrian-Middle Devonian trilobite Cheirurus
†Cheirurus
†Chirognathus – tentative report
†Chlupacispira – type locality for genus
- †Chlupacispira spinosa – type locality for species
†Chonetes
- †Chonetes capax – or unidentified related form
- †Chonetes illinoisensis – or unidentified related form
- †Chonetes manitobensis – or unidentified comparable form
- †Chonetes timanicus – or unidentified related form
- †Chonetes verneuile – or unidentified comparable form
- †Chonetes verneuilianus – or unidentified related form
†Chonetina – report made of unidentified related form or using admittedly obsolete nomenclature
†Chonetinella
†Chonetipustula
- †Chonetipustula concentrica
†Chonetoidea – or unidentified related form
†Chonophyllum
†Choristites
†Christiania
- †Christiania aseptata – type locality for species
†Chusenella
- †Chusenella atlinensis – or unidentified loosely related form
Fossil of the Carboniferous tabulate coral Cladochonus
†Cladochonus
†Cladopora
†Cladospongia – type locality for genus
- †Cladospongia alaskensis – type locality for species
†Clathronema
- †Clathronema cingulata
- †Clathronema cloughi
†Cleiothyridina
- †Cleiothyridina milleri – type locality for species
- †Cleiothyridina sublamellosa – or unidentified related form
†Cleiothyris
- †Cleiothyris suborbiculoides – or unidentified related form
†Cliefdenella
- †Cliefdenella alaskaensis
Assemblage of fossils of the Cambrian graptolite Climacograptus
†Climacograptus
- †Climacograptus antiquus – or unidentified related form
- †Climacograptus bicornis
- †Climacograptus eximius – or unidentified comparable form
- †Climacograptus hughesi – or unidentified comparable form
- †Climacograptus indivisus
- †Climacograptus innotatus
- †Climacograptus medius
- †Climacograptus minutus – tentative report
- †Climacograptus phyllophorus – or unidentified comparable form
- †Climacograptus pungens
- †Climacograptus rectangularis
- †Climacograptus scalaris
- †Climacograptus stenotelus
- †Climacograptus trifilis
†Cliothyridina
- †Cliothyridina incrassata – or unidentified related form
- †Cliothyridina orbicularis – or unidentified related form
- †Cliothyridina sublamellosa – or unidentified related form
†Clisiophyllum
†Clorinda
†Codonofusiella
†Coelocaulus
- †Coelocaulus karlae – type locality for species
†Coeloconus
†Coelospira
†Coelotrochium
†Coenites
†Colpomya – tentative report
- †Colpomya audae – or unidentified related form
- †Colpomya hugini – or unidentified related form
†Compacoleus
Fossilized shell of the Late Devonian-Permian brachiopod Composita
†Composita
- †Composita ambigua – or unidentified comparable form
- †Composita bellula – or unidentified related form
†Comuquia
- †Comuquia curvirostris – or unidentified related form
†Conchidium
- †Conchidium alaskense
- †Conchidium knighti
†Condrathyris
- †Condrathyris perplexa
†Conocardium
†Contortophyllum
†Cordylodus – tentative report
†Corymbospongia
- †Corymbospongia adnata
- †Corymbospongia amplia – type locality for species
- †Corymbospongia betella
†Corynexochus
- †Corynexochus perforatus
- †Corynexochus plumula
†Corynoides
- †Corynoides tricornis
†Cotalagnostus – or unidentified comparable form
- †Cotalagnostus lens
†Cranaena
- †Cranaena romingeri – or unidentified comparable form
Fossilized shell of the Late Cretaceous brachiopod Crania
†Crania
†Craspedalosia – tentative report
†Craspedelia
- †Craspedelia potterella – type locality for species
†Crassialveolites
†Craterophyllum – or unidentified comparable form
†Craticula – report made of unidentified related form or using admittedly obsolete nomenclature
- †Craticula gotlandica
†Crurithyris
- †Crurithyris alaskensis – type locality for species
†Cryptacanthia
- †Cryptacanthia compacta – or unidentified related form
†Cryptograptus
- †Cryptograptus centrifugus – or unidentified comparable form
- †Cryptograptus schaferi
- †Cryptograptus tricornis
†Cyathactis
†Cyathaxonia
†Cyathodictya
†Cyathophylloides
†Cyathophyllum
†Cyclonema
- †Cyclonema servus
Fossilized foliage from the Carboniferous seed fern Cyclopteris
†Cyclopteris – tentative report
†Cyclospira
- †Cyclospira elegantula
- †Cyclospira orbus
†Cymbidium
- †Cymbidium acutum
- †Cymbidium retrorsum
†Cymostrophia
- †Cymostrophia costatula – or unidentified comparable form
†Cyphaspis
†Cypricardella
†Cypricardina
- †Cypricardina consimilis – or unidentified related form
†Cypricardinia
- †Cypricardinia contexta
†Cyrolexis
- †Cyrolexis superstes – or unidentified related form
†Cyrtia
†Cyrtina
- †Cyrtina billingsi – or unidentified comparable form
†Cyrtinaella
- †Cyrtinaella undulata
Restoration of the Cambrian-Middle Devonian nautiloid cephalopod Cyrtoceras
†Cyrtoceras
†Cyrtospira
†Cyrtospirifer
- †Cyrtospirifer buddingtoni – type locality for species
- †Cyrtospirifer paridaensis
†Cystihalysites
†Cystiphylloides
†Cystiphyllum
†Cystodictya
- †Cystodictya lineata – or unidentified related form
- †Cystodictya pustulosa – or unidentified related form
†Cystostroma
†Cystothalamiella
- †Cystothalamiella alaskaensis
- †Cystothalamiella ducta
- †Cystothalamiella irregularis – type locality for species
- †Cystothalamiella polyducta
Cytherella – tentative report
†Cyztograptus

D

†Daidia
- †Daidia cerithioides
- †Daidia sewardensis
†Dalmanella
- †Dalmanella occlusa
Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites
†Dalmanites
†Dasometopus
- †Dasometopus breviceps
†Dechenella
†Decorospira
- †Decorospira lepaini – type locality for species
- †Decorospira minutula – type locality for species
- †Decorospira tasselli
†Deiracorallium
†Delthyris
- †Delthyris sulcatus
†Deltopecten
- †Deltopecten caneyanus – or unidentified related form
- †Deltopecten wyandotte – or unidentified related form
†Dendrograptus
†Dendrostella
- †Dendrostella rhenana – or unidentified comparable form
Shell of a Dentalium tusk shell
†Dentalium
- †Dentalium hecetaensis
†Derbyia
- †Derbyia bennetti – or unidentified related form
- †Derbyia grandis – or unidentified comparable form
- †Derbyia robusta – or unidentified related form
†Diambonia
- †Diambonia discuneata
†Diaphragmus
†Dicellograptus
- †Dicellograptus caduceus – or unidentified comparable form
- †Dicellograptus elegans – or unidentified comparable form
- †Dicellograptus gurleyi
- †Dicellograptus sextans
- †Dicellograptus smithi – or unidentified comparable form
†Dicoelosia
- †Dicoelosia jonesridgensis
†Dicranograptus
- †Dicranograptus contortus – tentative report
†Dicricoconus
- †Dicricoconus dutroi
- †Dicricoconus mesodevonicus
- †Dicricoconus triannulatus
†Dictyoclostus
- †Dictyoclostus gallatinensis – or unidentified related form
- †Dictyoclostus semireticulatus
- †Dictyoclostus tartaricus
†Dictyonema
Fossil of the Middle Ordovician graptolite Didymograptus
†Didymograptus
- †Didymograptus extensus – or unidentified comparable form
- †Didymograptus nitidus – or unidentified comparable form
- †Didymograptus sagitticaulis
- †Didymograptus serratulus
†Dielasma
- †Dielasma arkansanum – or unidentified related form
- †Dielasma bovidens – or unidentified related form
- †Dielasma formosum – or unidentified related form
- †Dielasma supracarbonicum – or unidentified related form
†Digonophyllum
†Dimorphograptus
- †Dimorphograptus confertus
- †Dimorphograptus physophora
†Diorthelasma
- †Diorthelasma parvum
†Diparelasma
†Diphyphyllum
†Diplochone
Cambrian graptolite Diplograptus
†Diplograptus
- †Diplograptus cyperoides – or unidentified comparable form
- †Diplograptus elongatus
- †Diplograptus euglyptus
- †Diplograptus hughesi
- †Diplograptus inutilis
- †Diplograptus modestus
- †Diplograptus mucroterminatus
- †Diplograptus multidens – or unidentified related form
- †Diplograptus nicolsoni – or unidentified comparable form
†Diplopora – tentative report
†Disphyllum
- †Disphyllum catenatum – or unidentified comparable form
- †Disphyllum goldfussi – or unidentified comparable form
†Disphyllym – tentative report
†Diversograptus
†Doleroides
- †Doleroides panna – or unidentified related form
†Donaldiella
†Donaldospira
- †Donaldospira pertusa
†Dorypyge
- †Dorypyge olenekensis – or unidentified comparable form
†Drepanodus
†Drepanoistodus
- †Drepanoistodus suberectus
Fossilized foliage from the Early-Late Devonian club moss relative Drepanophycus
†Drepanophycus
†Droharhynchia
- †Droharhynchia rzhonsnitskayae – type locality for species
†Dubovikovia
- †Dubovikovia kuzmini – or unidentified comparable form
†Dunbarula
†Dunderbergia
- †Dunderbergia seducta – type locality for species
†Duolobella – type locality for genus
- †Duolobella sandiae – type locality for species
†Dutrochus – type locality for genus
- †Dutrochus alaskensis – type locality for species
†Dyoros
- †Dyoros spitzbergianus – or unidentified comparable form
†Dytremacephalus – tentative report

E

†Echinoconchus
- †Echinoconchus punctatus
†Echyropora – tentative report
†Ectomaria
- †Ectomaria orientalis
- †Ectomaria pagoda – or unidentified comparable form
- †Ectomaria prisca – or unidentified comparable form
†Edmondia
†Ekvasophyllum
†Elburgia
- †Elburgia disgranosa – type locality for species
†Eleutherokomma
†Eleutherospira
- †Eleutherospira medfraensis
† Ella – tentative report
- †Ella simensis – or unidentified related form
†Ellesmeroceras
Fossils at different stages of development of the Cambrian trilobite Elrathia
†Elrathia
- †Elrathia alaskensis – type locality for species
†Emanuella
- †Emanuella altus
- †Emanuella neumani
†Emmonsia
†Endothyra
- †Endothyra bowmani – or unidentified related form
†Entactinia
- †Entactinia modesta
†Enteletes – tentative report
†Entelophyllum – tentative report
†Entomis
- †Entomis pelagica
†Eoasianites
†Eoconchidium
†Eognathodus
- †Eognathodus sulcatus
†Eomarginifera
- †Eomarginifera longispinus
†Eomoelleritia – tentative report
†Eopteria
- †Eopteria richardsoni
†Eoreticularia – tentative report
†Eoschuchertella
†Eospirifer
†Epiphyton
†Epitomyonia
- †Epitomyonia relicina
†Euchondria – tentative report
- †Euchondria neglecta – or unidentified related form
†Euconospira
- †Euconospira conula – or unidentified related form
†Eumetria
- †Eumetria verneuiliana
†Eunema
- †Eunema quadrisulcata – or unidentified comparable form
†Euomphalopteris – tentative report
†Euomphalopterus – type locality for genus
- †Euomphalopterus liratus – type locality for species
Fossilized shell of the Silurian-Permian sea snail Euomphalus
†Euomphalus
- †Euomphalus brooksensis
- †Euomphalus bundtzeni
- †Euomphalus planodorsatus – or unidentified related form
- †Euomphalus planorbis
- †Euomphalus utahensis – or unidentified related form
†Euphemites
- †Euphemites carbonarius
†Euryzone

F

†Faberophyllum
†Falodus
†Farewellia – type locality for genus
- †Farewellia heidelbergerae – type locality for species
†Fasciculatia
- †Fasciculatia striatoparadoxa
†Fasciphyllum – tentative report
Fossil of the Late Ordovician-Permian tabulate coral Favosites
†Favosites
- †Favosites emmonsi – or unidentified comparable form
- †Favosites hemispericus
- †Favosites hemisphericus
- †Favosites limitaris
- †Favosites radiciformis
†Fenestella
†Filigreenia
- †Filigreenia circularis
†Finkelnburgia
†Fistulella
- †Fistulella undosa
†Fistulipora
†Fletcheria – tentative report
†Fluctuaria
- †Fluctuaria undata – or unidentified related form
†Follicucullus
- †Follicucullus monacanthus – or unidentified related form
†Foordites
- †Foordites platypleura – or unidentified comparable form
†Fusispira
Assemblage of fossils of Silurian-Permian fusulinid foraminiferans
†Fusulina
- †Fusulina elongata – or unidentified related form
†Fusulinella
- †Fusulinella eopulchra – or unidentified comparable form

G

†Gasterocoma – tentative report
- †Gasterocoma bicauli
†Gastrioceras
- †Gastrioceras nolinense – or unidentified related form
†Gelidorthis
- †Gelidorthis perisiberiaensis
Fossil of the Early-Late Ordovician trilobite Geragnostus
†Geragnostus
†Gervillia
- †Gervillia longa – or unidentified related form
†Girtyella
†Girtyocoelia – type locality for genus
- †Girtyocoelia epiporata
- †Girtyocoelia minima
†Girvanella
- †Girvanella problematica
†Glaberagnostus
- †Glaberagnostus cicer
†Glabrocingulum
- †Glabrocingulum grayvillense – or unidentified related form
†Globoendothyra
†Glossograptus
- †Glossograptus dentatus – or unidentified comparable form
- †Glossograptus echinatus – or unidentified comparable form
- †Glossograptus hincksii
- †Glossograptus horridus
- †Glossograptus hystrix – or unidentified related form
†Glyptograptus
- †Glyptograptus enodis – or unidentified comparable form
- †Glyptograptus gnomus
- †Glyptograptus incertus
- †Glyptograptus laciniosus
- †Glyptograptus lanpherei
- †Glyptograptus tamariscus
†Glyptopora
†Gomphoceras
†Goniatites
†Goniocladia – tentative report
†Goniophora
- †Goniophora thula – type locality for species
†Grammysia
†Granularaspis
†Graptospongia
Multiple views of a fossil of the Ordovician horn coral Grewingkia
†Grewingkia
†Grypophyllum
†Gypidula
- †Gypidula cornuta
- †Gypidula intervenicus – or unidentified comparable form
- †Gypidula optatus
- †Gypidula orbitatus
- †Gypidula pelagica
- †Gypidula perryi
- †Gypidula upatensis
†Gypiduloides
- †Gypiduloides craigenensis
†Gypospirifer
- †Gypospirifer condor
†Gyronema

H

†Hallograptus
- †Hallograptus mucronatus
†Halysites
†Haplistion – tentative report
†Haplospira
- †Haplospira craigi – type locality for species
†Hardyoides
- †Hardyoides aspinosa – type locality for species
†Harperoides – type locality for genus
- †Harperoides alaskensis – type locality for species
Fossil of the Devonian trilobite Harpides
†Harpides
†Harpidium
- †Harpidium insignis
- †Harpidium latus
- †Harpidium rotundus
†Hartshillia
- †Hartshillia clivosa
†Hecetaphyton
- †Hecetaphyton alaskense
†Hecetastoma – type locality for genus
- †Hecetastoma gehrelsi – type locality for species
†Hedstroemia – tentative report
†Hedstromophyllum
†Helicotoma
- †Helicotoma blodgetti – type locality for species
- †Helicotoma robinsoni – type locality for species
†Heliolites
†Heliophyllum
†Helioplasmolites
Fossil of the Cambrian trilobite Hemirhodon
†Hemirhodon
†Hemitrypa
†Hercynella
- †Hercynella bohemica
- †Hercynella nobilis
†Hexagonaria
†Hindeodus
†Holopea
†Holopella
†Homagnostus
- †Homagnostus alaskensis – type locality for species
†Hormospongia – type locality for genus
- †Hormospongia acara – type locality for species
- †Hormospongia diarteria – type locality for species
- †Hormospongia labyrinthica – type locality for species
†Hormotoma
†Horridonia
- †Horridonia horrida
†Hostimella
†Howellella
- †Howellella amsdeni
- †Howellella nucula
- †Howellella yacutica
†Howellites
- †Howellites amsdeni – type locality for species
†Howittia
- †Howittia haideri
†Hustedia
- †Hustedia meekana – or unidentified related form
- †Hustedia remota – or unidentified related form
†Hustedograptus
- †Hustedograptus teretiusculus
†Hypagnostus
†Hypomphalocirrus
- †Hypomphalocirrus rugosus – or unidentified comparable form
†Hypothyridina
- †Hypothyridina magister

I

†Icriodus
- †Icriodus angustoides
- †Icriodus taimyricus
†Iddingsia
- †Iddingsia relativa – type locality for species
†Idiognathodus
†Idiostroma
†Imperatoria
- †Imperatoria media
†Iowaphyllum
- †Iowaphyllum johanni – or unidentified comparable form
†Iowatrypa
- †Iowatrypa owenensis
†Iskutella
- †Iskutella gunningi
†Isochilina
†Isograptus
- †Isograptus forcipiformis
- †Isograptus manubriatus – or unidentified comparable form
†Isorthis
†Ivdelinia

J

†Janius
- †Janius velatus – or unidentified comparable form
†Jedria
- †Jedria deckeri
†Johnsonathyris – type locality for genus
- †Johnsonathyris adrianensis – type locality for species
†Juraspis
- †Juraspis schabanovi
†Juresania
- †Juresania juresanensis – or unidentified related form

K

†Kahlerina
†Karavankina
- †Karavankina fasciata – or unidentified related form
†Ketophyllum
†Kindleina – type locality for genus
- †Kindleina suemezensis – type locality for species
Fossilized shells of the Middle Ordovician-Permian nautiloid cephalopod Kionoceras
†Kionoceras
†Kirkidium
†Kirkirhynchus
- †Kirkirhynchus reesidei
†Kirkospira – type locality for genus
- †Kirkospira glacialis – type locality for species
- †Kirkospira tongassensis – type locality for species
†Kitikamispira
- †Kitikamispira ormistoni
†Klakesia
†Kochiproductus
- †Kochiproductus porrectus – or unidentified related form
†Komiella
- †Komiella gilberti – type locality for species
- †Komiella ostiolata – or unidentified related form
Fossil of the Cambrian trilobite Kootenia
†Kootenia
- †Kootenia anabarensis – or unidentified comparable form
- †Kootenia granulospinosa – type locality for species
- †Kootenia serrata – or unidentified comparable form
†Krausella
†Krotovia
- †Krotovia pustulata – or unidentified related form
†Kuskokwimia – type locality for genus
- †Kuskokwimia moorei – type locality for species
†Kuvelousia
- †Kuvelousia sphiva
- †Kuvelousia weyprechti – or unidentified comparable form