Strombina waltonia
Columbellidae
Strombus chipolanus
Strombidae
Stylemys nebrascensis
Testudinidae
Sus scrofa
Suidae
Tapirus veroensis
Tapiridae
Taxodium distichum
Taxodiaceae
Terrapene carolina
Emydidae
Trachycardium isocardia
Cardiidae
Trisaurus secundus
Troglocladodus trimblei
Ctenacanthidae
Turbonilla spillmani
Pyramidellidae
Turritella chipolana
Turritellidae
Turritella segmenta
Turritellidae
Turritella tippana
Turritellidae
Tylosaurus proriger
Mosasauridae
Typhis pterinus
Muricidae
Ursus americanus
Ursidae
Venericardia hadra
Carditidae
Veniella conradi
Arcticidae