Taxonomic names from W. I. Mitchell 1977
- Acanthocrania spiculata (Rowley 1908) [Craniidae]
- Acrotretidina, suborder, Kuhn 1949 [Acrotretida]
- Atelelasma perfectum, Cooper 1956 [Clitambonitidae]
- Atelelasmatinae, subfamily, Cooper 1956 [Clitambonitidae]
- Athyris headi, Billings 1862 [Anazygidae]
- Atrypa congesta, Conrad 1842 [Hyattidinidae]
- Atrypa exigua, Hall 1847 [Protozygidae]
- Atrypa extans, Emmons 1842 [Triplesiidae]
- Atrypa nitens, Hisinger 1837 [Acrotretidae]
- Barbarorthis foramenifera, Opik 1934 [Hesperorthidae]
- Bimuria superba, Ulrich and Cooper 1942 [Bimuriidae]
- Brachyprion portlocki (Reed 1952) [Leptostrophiidae]
- Camerella volborthi, Billings 1859 [Camerellidae]
- Campylorthis discreta (Reed 1952) [Plaesiomyidae]
- Carinatininae, subfamily, Rzhonsnitskaya 1960 [Atrypidae]
- Catazyga anticostiensis, Billings 1862 [Anazygidae]
- Christiania perrugata elongata, W. I. Mitchell 1977 [Christianiidae]
- Christiania portlocki, W. I. Mitchell 1977 [Christianiidae]
- Christiania tenuicincta (McCoy 1846) [Christianiidae]
- Clitambonitacea, superfamily, Winchell and Schuchert 1893 [Billingsellida]
- Clitambonitinae, subfamily, Schuchert and Cooper 1932 [Clitambonitidae]
- Colaptomena concentrica (Portlock 1843) [Rafinesquinidae]
- Craniella meduanensis, Oehlert 1888 [Craniidae]
- Craniidina, suborder, Waagen 1885 [Lingulida]
- Cremnorthinae, subfamily, Williams 1963 [Cremnorthidae]
- Cremnorthis parva, Williams 1963 [Cremnorthidae]
- Cyclospira nana, Davidson 1869 [Cyclospiridae]
- Cyphomena homostriata indicissa, Williams 1962 [Furcitellidae]
- Cyrtonotella virginiensis, Butts 1942 [Archaeorthidae]
- Dactylogonia geniculata, Ulrich and Cooper 1942 [Furcitellidae]
- Dalmanella sculpta, Cooper 1956 [Dalmanellidae]
- Dalmanella testudinaria transversa, W. I. Mitchell 1977 [Dalmanellidae]
- Daylacea, superfamily, Waagen 1883 [Atrypida]
- Dicoelosia simulata, W. I. Mitchell 1977 [Dicoelosiidae]
- Diplonorthis portlocki, W. I. Mitchell 1977 [Archaeorthidae]
- Discina perrugata, Reed 1917 [Discinidae]
- Discinidae, family, Gray 1840 [Discinidae]
- Disciniidae, family (Gray 1840) [Disciniidae]
- Doleroides winchelli, Cooper 1956 [Plectorthidae]
- Dolerorthinae, subfamily, Opik 1934 [Dolerorthidae]
- Eochonetes celticus, W. I. Mitchell 1977 [Sowerbyellidae]
- Eodinobolus balclatchiensis, Reed 1917 [Trimerellidae]
- Eremotrema biconvexum, Cooper 1956 [Dalmanellidae]
- Eremotrema paucicostellatum, Mitchell 1977 [Dalmanellidae]
- Fascifera subcarinata, Ulrich and Cooper 1942 [Draboviidae]
- Glossella papillosa, Cooper 1956 [Obolidae]
- Glyptorthis maritima, Wright 1964 [Glyptorthidae]
- Gonambonitacea, superfamily, Schuchert and Cooper 1931 [Billingsellida]
- Gonambonites panderi, Opik 1930 [Gonambonitidae]
- Hyattidina plicata, W. I. Mitchell 1977 [Hyattidinidae]
- Isophragma ricevillense, Cooper 1956 [Plectambonitidae]
- Isopiiragmatinae, subfamily, Cooper 1956 [Leptestiidae]
- Kjerulfina polycyma, Bancroft 1929 [Rafinesquinidae]
- Kjerulfina trigonalis, Bancroft 1929 [Rafinesquinidae]
- Kullervoidae, family, Opik 1934 [Kullervoidae]
- Leangella, Opik 1933 [Leptestiidae]
- Leptaena grayae, Davidson 1883 [Hesperomenidae]
- Leptaena kjerulfi, Holtedahl 1916 [Rafinesquinidae]
- Leptaena minuta, Kiaer 1926 [Rafinesquinidae]
- Leptaena sericea, Sowerby 1839 [Sowerbyellidae]
- Leptaena subquadrata, Hall 1883 [Christianiidae]
- Leptestiina oepiki (Whittington 1938) [Leptestiidae]
- Leptestiina prantli, Havlicek 1952 [Leptestiidae]
- Lingula brevis, Portlock 1843 [unclassified species]
- Lingula granulata, Phillips and Davidson 1883 [Obolidae]
- Lingula lata, Portlock 1843 [unclassified species]
- Lingulella brevis (Sowerby 1839) [Obolidae]
- Liostrophia glabra, Cooper and Kindle 1936 [Parastrophinidae]
- Luhaia vardi, Roomusoks 1956 [Furcitellidae]
- Mimella rotunda (Sowerby 1839) [Draboviidae]
- Mjoesina moorei, W. I. Mitchell 1977 [Glyptomenidae]
- Obolellina magnifica, Billings 1872 [Trimerellidae]
- Oepikinae, subfamily, Sokolskaya 1960 [Strophomenidae]
- Onychotreta mesleri, Ulrich and Cooper 1936 [Triplesiidae]
- Orbicula elliptica, Kutorga 1846 [Discinidae]
- Orbiculoidea armstrongi, Reed 1952 [Discinidae]
- Origostrophia, W. I. Mitchell 1977 [Stropheodontidae]
- Origostrophia fragilis, W. I. Mitchell 1977 [Stropheodontidae]
- Orthambonites parva, Pander 1830 [unclassified species]
- Orthambonites transversa, Dall 1877 [Orthidae]
- Orthina, suborder, Schuchert and Cooper 1932 [Orthida]
- Orthis bilobata, Portlock 1843 [Orthidae]
- Orthis bisulcata, Emmons 1842 [Cyclospiridae]
- Orthis corrugata, Portlock 1843 [Strophodontidae]
- Orthis fallax, Salter 1846 [Plectorthidae]
- Orthis gibbosa, Billings 1857 [Plectorthidae]
- Orthis semicircularis, Eichwald 1829 [Archaeorthidae]
- Orthis vespertilio, Portlock 1843 [unclassified species]
- Orthisina scotica, McCoy 1852 [Plectorthidae]
- Oxoplecia calhouni, Wilson 1913 [Triplesiidae]
- Paterula bohemica, Barrande 1879 [Paterulidae]
- Paucicrura cristifera, Cooper 1956 [Dalmanellidae]
- Paurorthis parva (Pander 1830) [Paurorthidae]
- Pholidostrophia (Eopholidostrophia) portlocki (Reed 1952) [Eopholidostrophiidae]
- Pionodema globosa, Willard 1928 [Plectorthidae]
- Plaesiomys porcata lata, W. I. Mitchell 1977 [Plaesiomyidae]
- Plectambonites sericea (Sowerby and Murchison 1839) [unclassified species]
- Plectatrypa hibernica, Reed 1952 [Atrypidae]
- Plectoglossa oklahomensis, Cooper 1956 [Obolidae]
- Plectorthis nicklesi, Foerste 1909 [Glyptorthidae]
- Pomeromena transversa, W. I. Mitchell 1977 [Glyptomenidae]
- Porambonites ottawaensis, Billings 1862 [Ancistrorhynchidae]
- Producta tenuicincta, McCoy 1846 [Productellidae]
- Rhactomena, W. I. Mitchell 1977 [Rafinesquinidae]
- Rhactomena splendens, W. I. Mitchell 1977 [Rafinesquinidae]
- Rhynchotrema plicata, Cooper and Kindle 1936 [Rhynchotrematidae]
- Rhynchotrema plicatum (Cooper and Kindle 1936) [Rhynchotrematidae]
- Rostricellula simulata (Reed 1952) [Trigonirhynchiidae]
- Rugosowerbyella, W. I. Mitchell 1977 [Sowerbyellidae]
- Rugosowerbyella ambigua (Reed 1952) [Sowerbyellidae]
- Salopina ordovicica, W. I. Mitchell 1977 [Draboviidae]
- Sampo hiiuensis, Opik 1933 [Leptestiidae]
- Sampo opiki, Whittington 1938 [Leptestiidae]
- Sampo ruralis (Reed 1917) [Leptestiidae]
- Schizophorella fallax fallax, Salter 1846 [Plectorthidae]
- Schizotreta corrugata, Cooper 1956 [Discinidae]
- Skenidioides billingsi, Schuchert and Cooper 1931 [Skenidiidae]
- Skenidioides elongatus, Cooper 1956 [Skenidiidae]
- Skenidioides greenhoughi, Reed 1917 [Skenidiidae]
- Sowerbyella (Rugosowerbyella) ambigua (Reed 1952) [Sowerbyellidae]
- Sowerbyella (Sowerbyella) monilifera (Cooper 1956) [Sowerbyellidae]
- Sowerbyella (Sowerbyella) monilifera (Cooper 1956) [Sowerbyellidae]
- Sowerbyella (Sowerbyella) thraivensis, Sowerby and Murchison 1839 [unclassified species]
- Sowerbyella (Viruella), Roomusoks 1959 [Sowerbyellidae]
- Sowerbyella monilifera, Cooper 1956 [Sowerbyellidae]
- Sowerbyella precursor, Jones 1928 [Sowerbyellidae]
- Sowerbyites hibernicus, W. I. Mitchell 1977 [Syndielasmatidae]
- Sowerbyites medioseptatus, Teichert 1937 [Syndielasmatidae]
- Stropheodonta corrugatella, Davidson 1871 [unclassified species]
- Strophomena cancellata (Portlock 1843) [Strophomenidae]
- Strophomena concava, Holtedahl 1916 [Leptellinidae]
- Strophomena deflecta, Conrad 1843 [Plaesiomyidae]
- Strophomena norvegica lata, Williams 1962 [Strophomenidae]
- Strophomena rugosa, Rafinesque and De Blainville 1824 [Strophomenidae]
- Strophomenidina, suborder, Opik 1934 [Strophomenida]
- Taphrorthis emarginata, Cooper 1956 [Orthidae]
- Terebratula imbricata, Sowerby and Murchison 1839 [Atrypidae]
- Titanambonites medius, Cooper 1956 [Leptellinidae]
- Trimurellina, W. I. Mitchell 1977 [Hesperomenidae]
- Trimurellina superba, W. I. Mitchell 1977 [Hesperomenidae]
- Triplesia grayiae, Davidson 1870 [Triplesiidae]
- Triplesiacea, superfamily, Schuchert 1913 [Orthida]
- Tyronella killeyensis, W. I. Mitchell 1977 [Tyronellidae]