Acanthambonia Cooper, 1956 † (basis of record)
Anomalorthis Ulrich & Cooper, 1936 † (additional source)
Anomalorthis rossi Hansen & Holmer, 2011 † (original description)
Archaeorthis Schuchert & Cooper, 1931 † (additional source)
Archaeorthis electra (Billings, 1865) † (basis of record)
Archaeorthis groenlandica Poulsen, 1937 † (basis of record)
Broeggeria Walcott, 1902 † (basis of record)
Broeggeria obscura Hansen & Holmer, 2011 † (original description)
Conotreta Walcott, 1889 † (basis of record)
Conotreta convexa Hansen & Holmer, 2011 † (original description)
Conotreta devota Krause & Rowell, 1975 † (taxonomy source)
Conotreta rusti Walcott, 1889 † (additional source)
Cyrtonotreta Holmer, 1989 † (basis of record)
Cyrtonotreta depressa (Cooper, 1956) † (additional source)
Cyrtonotreta profilbekkiensis Hansen & Holmer, 2011 † (original description)
Cyrtonotreta spinosa Hansen & Holmer, 2011 † (original description)
Dictyonites Cooper, 1956 † (basis of record)
Dictyonites mugilis Hansen & Holmer, 2011 † (original description)
Ectenoglossa Sinclair, 1945 † (basis of record)
Ectenoglossa oviforma Hansen & Holmer, 2011 † (original description)
Elkaniidae Walcott & Schuchert in Walcott, 1908 † (additional source)
Elliptoglossa Cooper, 1956 † (basis of record)
Elliptoglossa vulgaris Hansen & Holmer, 2011 † (original description)
Elliptoglossinae Popov & Holmer, 1994 † (basis of record)
Eoconulus subquadratus Hansen & Holmer, 2011 † (original description)
Eoorthidae Walcott, 1908 † (additional source)
Eurytreta Rowell, 1966 † (basis of record)
Eurytreta subtriangularis Hansen & Holmer, 2011 † (original description)
Finkelnburgia Walcott, 1905 † (basis of record)
Finkelnburgiidae Schuchert & Cooper, 1931 † (basis of record)
Glossella Cooper, 1956 † (additional source)
Glossella papillosa Cooper, 1956 † (additional source)
Glossellinae Cooper, 1956 † (basis of record)
Hesperonomia Ulrich & Cooper, 1936 † (basis of record)
Hesperonomia planidorsalis Ulrich & Cooper, 1936 † (basis of record)
Hesperonomiidae Ulrich & Cooper, 1936 † (basis of record)
Hisingerella Henningsmoen in Waern et al., 1948 † (basis of record)
Hisingerella maniformis Hansen & Holmer, 2011 † (original description)
Idiostrophia Ulrich & Cooper, 1936 † (taxonomy source)
Lenticulella Hansen & Holmer, 2011 † (original description)
Lenticulella amphora (Krause & Rowell, 1975) † (new combination reference)
Leptella Hall & Clarke, 1892 † (basis of record)
Leptella inequicostellata Hansen & Holmer, 2011 † (original description)
Leptellinae Williams, 1965 † (basis of record)
Mirilingula Popov in Koneva & Popov, 1983 † (basis of record)
Mirilingula mutabilis Popov in Koneva & Popov, 1983 † (additional source)
Mirilingula svalbardensis Hansen & Holmer, 2011 † (original description)
Nothorthis Ulrich & Cooper, 1938 † (basis of record)
Nothorthis delicatula Ulrich & Cooper, 1938 † (basis of record)
Nothorthis subpyramidalis Hansen & Holmer, 2011 † (original description)
Numericoma Popov in Nazarov & Popov, 1980 † (basis of record)
Numericoma ornata Popov in Nazarov & Popov, 1980 † (additional source)
Numericoma proclina Hansen & Holmer, 2011 † (original description)
Obolinae King, 1846 † (additional source)
Orthidiella Ulrich & Cooper, 1936 † (basis of record)
Orthidiella longwelli Ulrich & Cooper, 1936 † (basis of record)
Palaeoglossa Cockerell, 1911 † (basis of record)
Paterinata † (additional source)
Paterinida † (additional source)
Pelonomia Cooper, 1965 † (basis of record)
Pelonomia sulcata Hansen & Holmer, 2011 † (original description)
Pelonomiinae Cocks & Rong, 1989 † (basis of record)
Phragmorthidae Williams, 1965 † (basis of record)
Phragmorthis Cooper, 1956 † (basis of record)
Phragmorthis conciliata Popov, 1986 † (basis of record)
Phragmorthis crassa Cooper, 1956 † (basis of record)
Phragmorthis longisepta Xu & Liu, 1984 † (basis of record)
Phragmorthis mucronata Williams & Curry, 1985 † (basis of record)
Phragmorthis noda Hansen & Holmer, 2011 † (original description)
Porambonitoidea Davidson, 1853 † (additional source)
Protoskenidioides Williams, 1974 † (basis of record)
Protoskenidioides promontorium Hansen & Holmer, 2011 † (original description)
Punctolirinae Andreeva, 1982 † (basis of record)
Rosobolus Havliček, 1982 † (basis of record)
Rosobolus elongatus Hansen & Holmer, 2011 † (original description)
Scaphelasma Cooper, 1956 † (basis of record)
Scaphelasma lamellosum Krause & Rowell, 1975 † (basis of record)
Schizotreta Kutorga, 1848 † (taxonomy source)
Semitreta Biernat, 1973 † (basis of record)
Semitreta basisslettaensis Hansen & Holmer, 2011 † (original description)
Semitreta pustulosa Hansen & Holmer, 2011 † (original description)
Semitreta spitsbergensis Hansen & Holmer, 2011 † (original description)
Siphonotretoidea Kutorga, 1848 † (basis of record)
Syntrophiidina † (additional source)
Tetralobulidae Ulrich & Cooper, 1936 † (additional source)
Torynelasma Cooper, 1956 † (basis of record)
Trondorthis Neuman in Neuman & Bruton, 1974 † (basis of record)