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

A

†Abatocrinus

†Abatocrinus grandis

†Abrotocrinus

†Abrotocrinus coreyi

†Abrotocrinus nodosus

†Abrotocrinus unicus

†Acacocrinus

†Acacocrinus americanus

†Acanthopecten

†Acanthopecten procarboniferous

†Achistrum

†Achistrum brevis – type locality for species

†Achistrum ludwigi

†Achistrum nicholsoni

†Achistrum triassicum

†Achradocrinus

†Acidaspis

†Acinophyllum

†Acinophyllum davisi – type locality for species

†Acratia

†Acratia similaris

†Acrocrinus

†Acrocrinus constrictus

† Acrophyllum

†Acrophyllum ellipticum

†Acrophyllum oneidaense

†Acrophyllum rugosum

†Actinocrinites

†Actinocrinites gibsoni

†Actinocrinites grandissimus

†Actinocrinites lobatus – tentative report

†Actinocrinites lowei

†Actinopteria

†Actinopteria boydi

†Actinostroma

†Adinocrinus

†Adinocrinus nodosus

†Aemuliophyllum

†Aemuliophyllum exiguum

†Aganaster

†Aganaster gregarius

†Agaricocrinites

†Agaricocrinus

†Agaricocrinus americanus

†Agassizocrinus

†Agassizocrinus gibbosus – or unidentified comparable form

†Agassizocrinus laevis – or unidentified comparable form

†Ageneracrinus

†Ageneracrinus basalotumidus

†Ahrensisporites

†Ahrensisporites guerickei

†Aipoceras – tentative report

†Alaskadiscus

†Alaskadiscus magnus

†Alatisporites

†Alatisporites trialatus

†Alethopteris

†Alethopteris davreuxi

†Alethopteris decurrens

†Alethopteris grandini

†Alethopteris lonchitica

†Alethopteris owenii

†Alethopteris serlii

†Alisocrinus

†Alisocrinus aureatus

†Alisocrinus caleyi

†Alisocrinus laevis

†Allocrinus

†Allocrinus benedicti

†Allocystites

†Allocystites hammeli

†Alloprosallocrinus

†Alloprosallocrinus conicus

†Allorhynchus

†Allorhynchus curriei

†Alveolites

†Alveolites asperus

†Alveolites constans

†Alveolites dispansus

†Alveolites expatiatus

†Alveolites goldfussi

†Alveolites minimus

†Alveolites mordax

†Alveolites squamosus

†Alveolites winchellana

†Amaurotoma

†Amaurotoma leavenworthana – type locality for species

†Amaurotoma subangulatum – type locality for species

†Ambocoelia

†Ambonychia

†Ambonychia obesa

†Ambonychia robusta

†Ambonychia suberecta

Ammobaculites

†Ammobaculites leptos

†Ammobaculites pyriformis

Ammodiscus

†Ammodiscus longexsertus

†Ammonellipsites

†Ammovertella

†Ammovertella inclusa

†Ampheristocystis

†Ampheristocystis concentricus

†Amphipora

†Amphipsalidocrinus – type locality for genus

†Amphipsalidocrinus inconsuetus

†Amphipsalidocrinus scissurus – type locality for species

†Amphissites

†Amphissites similaris

†Amphistrophia

†Amphoracrinus

†Amplexiphyllum

†Amplexiphyllum cruciforme

†Amplexiphyllum simplex – tentative report

†Amplexiphyllum tenue

†Amplexizaphrentis

†Amplexizaphrentis spinulosus

†Amplexopora

†Amplexopora discoidea – or unidentified comparable form

†Amplexus

†Anachoropteris

†Anachoropteris involuta

†Anapiculatisporites

†Anapiculatisporites baccatus

†Anapiculatisporites spinosus

†Anartiocystis

†Anastrophia

†Anastrophia internascens

†Anchiopsis

†Ancyrocrinus

†Ancyrocrinus bulbosus

†Anematina

†Anematina proutana – type locality for species

†Angustidontus

†Angustidontus seriatus

†Angyomphalus

†Angyomphalus northviewensis – or unidentified related form

†Anisocrinus

†Anisocrinus laurelensis

†Anisotrypa

†Anisotrypa solida

†Ankyropteris

†Ankyropteris brongnartii

†Annularia

†Annularia mucronata

†Annularia radiata

†Annularia sphenophylloides

†Annularia stellata

†Anomalodonta

†Anomalodonta gigantea

†Anopliopsis

†Anopliopsis subcarinata

List of the Paleozoic life of Indiana