Rhynchonellata
Athyridida
Athyris cora
Athyris spiriferoides
Athyris vittata randalia
Atrypida
Atrypa reticularis
Spinatrypa sinuata
Spinatrypa spinosa milwaukeensis
Orthida
Rhipidomella leucosia
Rhipidomella penelope
Rhipidomella vanuxemi
Schizophoria iowensis musculosa
Schizophoria lata
Pentamerida
Pentamerella multicostata
Rhynchonellida
Cherryvalleyrostrum limitare
Cupularostrum depressa
Cupularostrum scitulus
Eumetabolotoechia greeni
Spiriferida
Allenella tullius
Ambocoelia umbonata
Mucrospirifer alpenensis
Mucrospirifer arkonensis
Mucrospirifer attenuatus
Mucrospirifer consobrinus
Mucrospirifer cooperi
Mucrospirifer grabaui
Mucrospirifer latus
Mucrospirifer multiplicatus
Mucrospirifer profundus
Mucrospirifer prolificus
Mucrospirifer thedfordensis
Paraspirifer acuminatus
Paraspirifer bownockeri
Spinocyrtia milwaukeensis
Tylothyris bimesialis
Tylothyris subvaricosa umbonata
Spiriferinida
Cyrtina triquetra
Cyrtina umbonata
Eosyringothyris occidentalis
Orthospirifer iowensis
Orthospirifer milwaukeensis
Terebratulida
Centronella impressa
Cranaena thomasi
Cryptonella planirostra
Cryptonella rectirostra