Acanthoscapha Ulrich & Bassler, 1923 † (original description)
Acanthoscapha (Acanthoscapha) Ulrich & Bassler, 1923 † (original description)
Acanthoscapha (Acanthoscapha) navicula (Ulrich, 1891) † represented as Acanthoscapha navicula (Ulrich, 1891) † (new combination reference)
Acanthoscapha navicula (Ulrich, 1891) † (new combination reference)
Acronotella Ulrich & Bassler, 1923 † (original description)
Acronotella shideleri Ulrich & Bassler, 1923 † (original description)
Aparchites alleghaniensis Ulrich & Bassler, 1923 † (original description)
Aparchites obliquatus Ulrich & Bassler, 1923 † (original description)
Aparchites punctillosus Ulrich & Bassler, 1923 † (original description)
Aparchitidae Ulrich & Bassler, 1923 † (original description)
Apatobolbina Ulrich & Bassler, 1923 † (original description)
Apatobolbina acuta Ulrich & Bassler, 1923 † (original description)
Apatobolbina appressa Ulrich & Bassler, 1923 † (original description)
Apatobolbina granifera Ulrich & Bassler, 1923 † (original description)
Apatochilina Ulrich & Bassler, 1923 † (original description)
Beyrichia hartnageli Ulrich & Bassler, 1923 † represented as  † (original description)
Beyrichia kirki Ulrich & Bassler, 1923 † represented as  † (original description)
Beyrichia lakemontensis Ulrich & Bassler, 1923 † represented as  † (original description)
Beyrichia mesleri Ulrich & Bassler, 1923 † represented as  † (original description)
Beyrichia tonolowayensis Ulrich & Bassler, 1923 † (original description)
Beyrichia veronica Ulrich & Bassler, 1923 † represented as  † (original description)
Bolbibollia Ulrich & Bassler, 1923 † (original description)
Bolbibollia labrosa Ulrich & Bassler, 1923 † (original description)
Bollia immersa Ulrich & Bassler, 1923 † (original description)
Bollia nitida Ulrich & Bassler, 1923 † (original description)
Bollia pulchella Ulrich & Bassler, 1923 † (original description)
Bonnemaia Ulrich & Bassler, 1923 † (original description)
Bonnemaia celsa Ulrich & Bassler, 1923 † (original description)
Bonnemaia crassa Ulrich & Bassler, 1923 † (original description)
Bonnemaia fissa Ulrich & Bassler, 1923 † (original description)
Bonnemaia longa Ulrich & Bassler, 1923 † (original description)
Bonnemaia notha Ulrich & Bassler, 1923 † (original description)
Bonnemaia obliqua Ulrich & Bassler, 1923 † (original description)
Bonnemaia oblonga Ulrich & Bassler, 1923 † (original description)
Bonnemaia perlonga Ulrich & Bassler, 1923 † (original description)
Bonnemaia pulchella Ulrich & Bassler, 1923 † (original description)
Bonnemaia rudis Ulrich & Bassler, 1923 † (original description)
Bonnemaia transita Ulrich & Bassler, 1923 † (original description)
Bythocypris keyserensis Ulrich & Bassler, 1923 † (original description)
Bythocypris pergracilis Ulrich & Bassler, 1923 † (original description)
Bythocypris phaseolina Ulrich & Bassler, 1923 † (original description)
Chilobolbina Ulrich & Bassler, 1923 † (original description)
Chilobolbina punctata Ulrich & Bassler, 1923 † (original description)
Coelochilina Ulrich & Bassler, 1923 † (original description)
Cornikloedenia ventricornis obsoleta (Ulrich & Bassler, 1923) Henningsmoen, 1955 † (original description)
Cornikloedenia ventricornis ventricornis (Ulrich & Bassler, 1923) Henningsmoen, 1955 † (original description)
Dibolbina Ulrich & Bassler, 1923 † (original description)
Dibolbina cristata Ulrich & Bassler, 1923 † (original description)
Dibolbina producta Ulrich & Bassler, 1923 † (original description)
Drepanellidae Ulrich & Bassler, 1923 † (original description)
Drepanellina Ulrich & Bassler, 1923 † (original description)
Drepanellina clarki Ulrich & Bassler, 1923 † (original description)
Drepanellina modesta Ulrich & Bassler, 1923 † (original description)
Drepanellina simplex Ulrich & Bassler, 1923 † (original description)
Drepanellina ventralis Ulrich & Bassler, 1923 † (original description)
Eridoconcha Ulrich & Bassler, 1923 † (original description)
Eridoconcha rotunda Ulrich & Bassler, 1923 † (original description)
Eridoconcha rugosa Ulrich & Bassler, 1923 † (original description)
Eukloedenella Ulrich & Bassler, 1923 † (original description)
Eukloedenella abrupta Ulrich & Bassler, 1923 † (original description)
Eukloedenella brevis Ulrich & Bassler, 1923 † (original description)
Eukloedenella bulbosa Ulrich & Bassler, 1923 † (original description)
Eukloedenella dorsata Ulrich & Bassler, 1923 † (original description)
Eukloedenella foveolata Ulrich & Bassler, 1923 † (original description)
Eukloedenella indivisa Ulrich & Bassler, 1923 † (original description)
Eukloedenella longula Ulrich & Bassler, 1923 † (original description)
Eukloedenella primitioides Ulrich & Bassler, 1923 † (original description)
Eukloedenella punctillosa Ulrich & Bassler, 1923 † (original description)
Eukloedenella similis Ulrich & Bassler, 1923 † (original description)
Eukloedenella simplex Ulrich & Bassler, 1923 † (original description)
Eukloedenella sinuata Ulrich & Bassler, 1923 † (original description)
Eukloedenella sulcifrons Ulrich & Bassler, 1923 † (original description)
Eukloedenella umbilicata Ulrich & Bassler, 1923 † (original description)
Eukloedenella umbonata Ulrich & Bassler, 1923 † (original description)
Euprimitia Ulrich & Bassler, 1923 † (original description)
Euprimitia buttsi Ulrich & Bassler, 1923 † (original description)
Eurychilinidae Ulrich & Bassler, 1923 † (original description)
Halliella subequata Ulrich & Bassler, 1923 † (original description)
Haploprimitia Ulrich & Bassler, 1923 † (original description)
Haploprimitia (Haploprimitia) Ulrich & Bassler, 1923 † (original description)
Herrmannina willsensis (Ulrich & Bassler, 1923) Swartz, 1949 † (original description)
Kloedenella gibberosa Ulrich & Bassler, 1923 † (original description)
Kloedenella immersa Ulrich & Bassler, 1923 † (original description)
Kloedenella intermedia antecedens (Ulrich & Bassler, 1923) Bassler & Kellett, 1934 † (original description)
Kloedenella nitida Ulrich & Bassler, 1923 † (original description)
Kloedenella obliqua Ulrich & Bassler, 1923 † (original description)
Kloedenella rectangularis Ulrich & Bassler, 1923 † (original description)
Kloedenella scapha Ulrich & Bassler, 1923 † (original description)
Kloedenella subovata Ulrich & Bassler, 1923 † (original description)
Kloedenella transitans Ulrich & Bassler, 1923 † (original description)
Kloedenia kenziensis Ulrich & Bassler, 1923 † (original description)
Kloedenia longula Ulrich & Bassler, 1923 † (original description)
Kloedenia obscura Ulrich & Bassler, 1923 † (original description)
Kyamodes swartzi Ulrich & Bassler, 1923 † (original description)
Laccoprimitia Ulrich & Bassler, 1923 † (original description)
Laccoprimitia resseri Ulrich & Bassler, 1923 † (original description)
Leperditia mathewsi Ulrich & Bassler, 1923 † (original description)
Leperditia willsensis (Ulrich & Bassler, 1923) Swartz, 1949 † accepted as Herrmannina willsensis (Ulrich & Bassler, 1923) Swartz, 1949 † (original description)
Leperditia willsensisi (Ulrich & Bassler, 1923) Swartz, 1949 † represented as Leperditia willsensis (Ulrich & Bassler, 1923) Swartz, 1949 † accepted as Herrmannina willsensis (Ulrich & Bassler, 1923) Swartz, 1949 † (original description)
Mastigobolbina Ulrich & Bassler, 1923 † (original description)