page_title: List of the Paleozoic life of Iowa
section_title: D
hierarchical_section_title: List of the Paleozoic life of Iowa / D
caption_attribution_description: English: crop of file in file name
context_page_description: This list of the Paleozoic life of Iowa contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Iowa and are between 541 and 252.17 million years of age.
context_section_description: †Dalejina
  †Dalmanella
  †Dalmanella edgewoodensis – or unidentified comparable form
   †Dalmanites
  †Dapsilodus
  †Dapsilodus mutatus
  †Dawsonoceras
  †Decadocrinus
  †Decadocrinus crassidactylus – type locality for species
  †Decadocrinus pachydactylus – type locality for species
  †Decadocrinus spinulifer – type locality for species
  †Decaschisma
  †Dechenella
  †Dechenella haldemani – or unidentified comparable form
  †Dechenella nortoni
  †Dechenella prouti
  †Dechenella rowi – or unidentified comparable form
   †Deiphon
  †Delocrinus
  †Delocrinus vulgatus
  †Deltaherpeton – type locality for genus
  †Deltaherpeton hiemstrae – type locality for species
  †Delthyris – tentative report
  †Deltodus
  †Deltodus spatulatus
  †Dendrocrinus
  †Dendrocrinus casei
  †Dendrocrinus curvijunctus – or unidentified related form
  †Dendrocrinus oswegoensis
   †Dentalium
  †Dentalium grandaevum
  †Derbyia
  †Desquamatia
  †Desquamatia brandonensis
  †Desquamatia independensis
  †Desquamatia randalia
  †Desquamatia rotunda
  †Desquamatia rusica
  †Desquamatia scutiformis
  †Desquamatia waterlooensis
  †Devonatrypa
  †Devonatrypa brandonensis
  †Devonatrypa pronis
  †Devonatrypa trowbridgei
  †Devonatrypa waterlooensis
  †Devonochonetes
  †Devonochonetes calivini
  †Devonoproductus
  †Devonoproductus reticulocostus
  †Devonoproductus vulgaris
  †Devonoproductus walcotti
  †Diamphidiocystis
  †Diceromyonia
  †Dichacaenia
  †Dichacaenia harberti
  †Dichocrinus
  †Dicoelosia
  †Dicranella
  †Dicranella bicornis
  †Dicranella marginata
  †Dicranella simplex
  †Dicranella spinosa
  †Dicranella typa
  †Dicranopeltis
  †Dictyoclostus
  †Dictyotomaria
  †Dictyotomaria quasicapillaria – type locality for species
  †Dielasma
  †Dielasma burlingtonensis
  †Dielasma chouteauensis
  †Dielasma formosum
  †Dimerocrinites
  †Dimerocrinites hopkintonensis
  †Dimerocrinites pentangularis
  †Dimerocrinites sculptus
  †Dinobolus
  †Dinolobus
  †Dinorthis
  †Diopatraites
  †Diphyphyllum
  †Diploblastus
  †Diploblastus glaber
   †Diplograptus
  †Diplograptus modestus – or unidentified comparable form
  †Diplophyllum
  †Diplosphaerina
  †Diplosphaerina inaequalis
  †Discosorus
  †Disphyllum
  †Disphyllum conjugans – type locality for species
  †Disphyllum dispassum
  †Disphyllum floydense
  †Disphyllum iowensis – type locality for species
  †Disphyllum tubiforme
  †Dolerorthis
  †Donaldina – tentative report
  †Dorycrinus
  †Dorycrinus gouldi
  †Dorycrinus mississippiensis
  †Douvillina
  †Douvillina arcuata
  †Douvillina cayuta
  †Douvillina delicata
  †Douvillina distans
  †Douvillina maxima
  †Douvillina navicula
  †Douvillina oxycostratum
  †Douvillina variabilis
  †Douvillinaria
  †Douvillinaria delicata
  †Douvillinaria perversa
  †Douvillinaria variabilis
  †Douvillinaria variablis
  †Drepanoistodus
  †Drepanoistodus suberectus
  †Dudleyaspis
  †Dvorakia
  †Dvorakia chattertoni – type locality for species
caption: Life restoration of two species of the Silurian trilobite Deiphon
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