Taxonomic names from C. D. Walcott 1905
- Acrothele minuta, C. D. Walcott 1905 [Acrothelidae]
- Acrothele rarus, C. D. Walcott 1905 [Acrothelidae]
- Acrothyra minor, C. D. Walcott 1905 [Acrotretida]
- Acrotreta bisecta, Matthew 1901 [Acrotretidae]
- Acrotreta cancellata, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta eggegrundensis, Wiman 1903 [Acrotretidae]
- Acrotreta emmonsi, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta liani, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta neboensis, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta nox, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta pacifica, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta shantungensis, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta spinosa, C. D. Walcott 1905 [Acrotretidae]
- Acrotreta uplandensis, Wiman 1903 [Acrotretidae]
- Billingsella (Otusia), C. D. Walcott 1905 [Billingsellidae]
- Billingsella anomala, C. D. Walcott 1905 [Billingsellidae]
- Billingsella appalachia, C. D. Walcott 1905 [Billingsellidae]
- Billingsella dice, C. D. Walcott 1905 [Billingsellidae]
- Billingsella exporrecta rugosicostata, C. D. Walcott 1905 [Billingsellidae]
- Billingsella harlanensis, C. D. Walcott 1905 [Billingsellidae]
- Billingsella major, C. D. Walcott 1905 [Billingsellidae]
- Billingsella obscura, C. D. Walcott 1905 [Billingsellidae]
- Billingsella plicatella, C. D. Walcott 1905 [Billingsellidae]
- Billingsella pumpellyi, C. D. Walcott 1905 [Billingsellidae]
- Billingsella richthofeni, C. D. Walcott 1905 [Billingsellidae]
- Billingsella romingeri (Barrande 1848) [Bohemiellidae]
- Billingsella saffordi, C. D. Walcott 1905 [Billingsellidae]
- Billingsella striata, C. D. Walcott 1905 [Billingsellidae]
- Camerella antiquata, Billings 1861 [Naukatidae]
- Curticia, C. D. Walcott 1905 [Curticiidae]
- Curticia elegantula, C. D. Walcott 1905 [Curticiidae]
- Dicellomus appalachia, C. D. Walcott 1905 [Obolidae]
- Dicellomus parvus, C. D. Walcott 1905 [Obolidae]
- Elkania bellula, C. D. Walcott 1905 [Elkaniidae]
- Eostrophomena (C. D. Walcott 1905) [Orthidiellidae]
- Finkelnburgia (C. D. Walcott 1905) [Finkelnburgiidae]
- Gonambonites plana retroflexa, de Verneuil 1830 [Plectorthidae]
- Iphidella, C. D. Walcott 1905 [Paterinidae]
- Iphidella labradorica (Billings 1861) [Paterinidae]
- Iphidella labradorica orientalis, C. D. Walcott 1905 [Paterinidae]
- Iphidella labradorica utahensis, C. D. Walcott 1905 [Paterinidae]
- Iphidella major, C. D. Walcott 1905 [Paterinidae]
- Iphidella nisus, C. D. Walcott 1905 [Paterinidae]
- Iphidella sculptilis (Meek 1873) [Paterinidae]
- Jamesella (C. D. Walcott 1905) [Protorthidae]
- Kutorgina latourensis, Matthew 1886 [Protorthidae]
- Kutorgina perugata, C. D. Walcott 1905 [Kutorginidae]
- Kutorgina sardiniaensis, C. D. Walcott 1905 [Kutorginidae]
- Lingula bottnica, Wiman 1903 [Lingulidae]
- Lingulella wanniecki, Redlich 1899 [Obolidae]
- Lingulepis matinalis, Hall 1863 [Obolidae]
- Nisusia, C. D. Walcott 1905 [Nisusiidae]
- Nisusia (Jamesella) amii, C. D. Walcott 1905 [Protorthidae]
- Nisusia (Jamesella) argenta, C. D. Walcott 1905 [Eoorthidae]
- Nisusia (Jamesella) erecta, C. D. Walcott 1905 [Protorthidae]
- Nisusia (Jamesella) perpasta (Pompeckj 1896) [Protorthidae]
- Nisusia (Jamesella) utahensis, C. D. Walcott 1905 [Protorthidae]
- Obolella (Kutorgina) (Billings 1861) [Kutorginidae]
- Obolella (Kutorgina) cingulata, Billings 1861 [Kutorginidae]
- Obolella asiatica, C. D. Walcott 1905 [Obolellidae]
- Obolella circe, Billings 1872 [Yorkiidae]
- Obolus (Lingulella) chinensis, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulella) damesi, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulella) fuchsi (Redlich 1899) [Obolidae]
- Obolus (Lingulella) isse, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulella) orus, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulella) pelias, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulella) quadrilateralis, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulella) septalis, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulella) upis, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulepis) (Hall 1863) [Obolidae]
- Obolus (Lingulepis) eros, C. D. Walcott 1905 [Obolidae]
- Obolus (Lingulepis) rowei, C. D. Walcott 1905 [Obolidae]
- Obolus (Westonia) alandensis, C. D. Walcott 1905 [Obolidae]
- Obolus (Westonia) baltica, C. D. Walcott 1905 [Obolidae]
- Obolus (Westonia) blackwelderi, C. D. Walcott 1905 [Obolidae]
- Obolus (Westonia) iphis, C. D. Walcott 1905 [Obolidae]
- Obolus (Westonia) themis, C. D. Walcott 1905 [Obolidae]
- Obolus (Westonia) wimani, C. D. Walcott 1905 [Obolidae]
- Obolus acadica, C. D. Walcott 1905 [Obolidae]
- Obolus ismene, C. D. Walcott 1905 [Obolidae]
- Obolus minimus, C. D. Walcott 1905 [Obolidae]
- Obolus nundina, C. D. Walcott 1905 [Obolidae]
- Obolus obscurus, C. D. Walcott 1905 [Obolidae]
- Obolus pectenoides, Whitfield 1875 [Obolidae]
- Obolus pheres, C. D. Walcott 1905 [Obolidae]
- Obolus shensiensis, C. D. Walcott 1905 [Obolidae]
- Obolus tetonensis, C. D. Walcott 1905 [Obolidae]
- Obolus tetonensis ninus, C. D. Walcott 1905 [Obolidae]
- Orthis (Finkelnburgia), C. D. Walcott 1905 [Orthidae]
- Orthis (Finkelnburgia) finkelnburgi, C. D. Walcott 1905 [Finkelnburgiidae]
- Orthis (Finkelnburgia) osceola, C. D. Walcott 1905 [Orthidae]
- Orthis (Finkelnburgia) osceola corrugata, C. D. Walcott 1905 [Orthidae]
- Orthis (Orusia), C. D. Walcott 1905 [Orthidae]
- Orthis (Orusia) lenticularis (Wahlenberg 1821) [Finkelnburgiidae]
- Orthis (Plectorthis) atava (Matthew 1893) [Plectorthidae]
- Orthis (Plectorthis) daunus, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) desmopleura nympha, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) diablo, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) doris, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) hastingsensis, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) iddingsi, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) indianola, C. D. Walcott 1905 [Eoorthidae]
- Orthis (Plectorthis) kayseri, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) pagoda, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) papias, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) remnicha (Winchell 1886) [Eoorthidae]
- Orthis (Plectorthis) remnicha sulcata, C. D. Walcott 1905 [Eoorthidae]
- Orthis (Plectorthis) remnicha texana, C. D. Walcott 1905 [Eoorthidae]
- Orthis (Plectorthis) remnicha winfieldensis, C. D. Walcott 1905 [Eoorthidae]
- Orthis (Plectorthis) tullbergi, C. D. Walcott 1905 [Plectorthidae]
- Orthis (Plectorthis) wichitaensis, C. D. Walcott 1905 [Eoorthidae]
- Orthis (Plectorthis) wichitaensis laeviusculus, C. D. Walcott 1905 [Eoorthidae]
- Orthis (Plectorthis) wimani, C. D. Walcott 1905 [Archaeorthidae]
- Orthis barabuensis, Winchell 1864 [Syntrophiidae]
- Orthis billingsi, Hartt 1868 [Protorthidae]
- Orthis desmopleura, Meek 1872 [Plectorthidae]
- Orthis exporrecta, Linnarsson 1876 [Billingsellidae]
- Orthis hicksi, Davidson 1868 [Billingsellidae]
- Orthis kuthani, Pompeckj 1896 [Protorthidae]
- Orthis lenticularis atrypoides, Matthew 1891 [Finkelnburgiidae]
- Orthis lenticularis lyncioides, Matthew 1891 [Finkelnburgiidae]
- Orthis lindstromi, Linarsson 1876 [Billingsellidae]
- Orthis linnarssoni, Kayser 1883 [Plectorthidae]
- Orthis newtonensis, Weller 1903 [Plectorthidae]
- Orthis perpasta macra, Pompeckj 1896 [Protorthidae]
- Orthis perpasta subquadrata, Pompeckj 1896 [Protorthidae]
- Orthis quacoensis, Matthew 1886 [Protorthidae]
- Orthis salemensis, Walcott 1887 [Billingsellidae]
- Orthis saltensis, Kayser 1876 [Plectorthidae]
- Orthis sandbergi, Winchell 1886 [Billingsellidae]
- Orthisina johannensis, Matthew 1891 [Plectorthidae]
- Orthisina orientalis, Whitfield 1884 [Billingsellidae]
- Orthisina transversa, Walcott 1886 [Nisusiidae]
- Orusia (C. D. Walcott 1905) [Finkelnburgiidae]
- Otusia (C. D. Walcott 1905) [Eoorthidae]
- Plectorthis atava, Matthew 1893 [unclassified species]
- Plectorthis desmopleura, Meek 1872 [unclassified species]
- Polytoechia montanensis, C. D. Walcott 1905 [Clarkellidae]
- Protorthis (Loperia), C. D. Walcott 1905 [Protorthidae]
- Protorthis (Loperia) dougaldensis, C. D. Walcott 1905 [Protorthidae]
- Protorthis helena, C. D. Walcott 1905 [Protorthidae]
- Protorthis laevis, C. D. Walcott 1905 [Protorthidae]
- Protorthis nautes, C. D. Walcott 1905 [Protorthidae]
- Protorthis nunnebergensis, C. D. Walcott 1905 [Protorthidae]
- Protorthis spencei, C. D. Walcott 1905 [Protorthidae]
- Protorthis wingi, C. D. Walcott 1905 [Protorthidae]
- Quebecia, C. D. Walcott 1905 [Yorkiidae]
- Rustella, C. D. Walcott 1905 [Kutorginidae]
- Rustella edsoni, C. D. Walcott 1905 [Kutorginidae]
- Schuchertina, C. D. Walcott 1905 [Kutorginidae]
- Schuchertina cambria, C. D. Walcott 1905 [Kutorginidae]
- Strophomena (Eostrophomena), C. D. Walcott 1905 [Strophomenidae]
- Strophomena (Eostrophomena) elegantula, C. D. Walcott 1905 [Orthidiellidae]
- Swantonia, C. D. Walcott 1905 [Naukatidae]
- Swantonia weeksi, C. D. Walcott 1905 [Naukatidae]
- Syntrophia abnormis, C. D. Walcott 1905 [Syntrophiidae]
- Syntrophia alata, C. D. Walcott 1905 [Syntrophiidae]
- Syntrophia billingsi, C. D. Walcott 1905 [Syntrophiidae]
- Syntrophia nundina, C. D. Walcott 1905 [Syntrophiidae]
- Syntrophia orientalis, C. D. Walcott 1905 [Syntrophiidae]
- Syntrophia primordialis argia, C. D. Walcott 1905 [Syntrophiidae]
- Syntrophia rotundata, C. D. Walcott 1905 [Syntrophiidae]
- Syntrophia texana, C. D. Walcott 1905 [Huenellidae]
- Syntrophia texana laeviusculus, C. D. Walcott 1905 [Huenellidae]
- Triplesia primordialis, Whitfield 1877 [Syntrophiidae]