| Limnotyphloplanida Dalyelliidae Graff, 1905 | | w | latest taxonomic authority | 89-91 |
| Axiola remanei (Ax, 1952) | [with synonyms] | w | other taxonomic work | |
| Beauchampiola oculifera (de Beauchamp, 1927) | [with synonyms] | w | latest taxonomic authority | 317-318 |
| Dalyelliidae Castrella Fuhrmann, 1900 | | w | latest taxonomic authority | 272 |
| Castrella (Castrella) agilis Fuhrmann, 1900 | | w | latest taxonomic authority | |
| Castrella (Castrella) bardeaui (Steinbock, 1926) | | w | latest taxonomic authority | |
| Castrella (Castrella) bologowiensis Plotnikow, 1906 | | w | latest taxonomic authority | |
| Castrella (Castrella) cylindrica Riedel, 1932 | | w | latest taxonomic authority | 289-290 |
| Castrella (Castrella) graffi Hayes WJ, 1945 | [with synonyms] | w | latest taxonomic authority | 286-287 |
| Castrella (Castrella) groenlandica Riedel, 1932 | | w | latest taxonomic authority | 288-289 |
| Castrella (Castrella) obscura (Plotnikow, 1905) | | w | latest taxonomic authority | |
| Castrella (Castrella) pinguis (Silliman, 1884) | [with synonyms] | w | latest taxonomic authority | 284-286 |
| Castrella (Castrella) quadrioculata (Vejdovsky, 1895) | | w | latest taxonomic authority | |
| Castrella (Castrella) serotina Dorner, 1902 | | w | latest taxonomic authority | |
| Castrella (Castrella) truncata (Abildgaard, 1789) | [with synonyms] | w | latest taxonomic authority | 272-281 |
| Castrella (Nasonoviella) lutheri (Nasonov, 1917) | [with synonyms] | w | latest taxonomic authority | 290-296 |
| Dalyelliidae Dalyellia Gieysztor, 1938 | [with synonyms] | w | latest taxonomic authority | 155-156 |
| Dalyellia Scopariella Ruebush & Hayes, 1939 | | w | latest taxonomic authority | |
| Dalyellia armigera Schmidt, 1861 | | w | latest taxonomic authority | |
| Dalyellia armigera armigera (part1) Hofsten N, 1912 | | w | latest taxonomic authority | |
| Dalyellia armigera armigera (part2) Hofsten N, 1912 | | - | latest taxonomic authority | |
| Dalyellia armigera armigera (part 3) Hofsten N, 1912 | | - | latest taxonomic authority | |
| Dalyellia armigera microphthalma Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia armygera Valkanov1926 | | w | latest taxonomic authority | |
| Dalyellia aspinosa (2) Szynal, 1932 | | w | latest taxonomic authority | |
| Dalyellia bardeaui Steinböck, 1926 | | w | latest taxonomic authority | |
| Dalyellia blodgetti (Silliman, 1884) | | w | latest taxonomic authority | |
| Dalyellia brevimana picta Fulinski & Szynal, 1933 | | w | latest taxonomic authority | |
| Dalyellia brevimana tectispinosa Weise, 1942 | | w | latest taxonomic authority | |
| Dalyellia brevispina Hofsten N, 1907 | | w | latest taxonomic authority | |
| Dalyellia brevispina marituica Nasonov, 1926 | | w | latest taxonomic authority | |
| Dalyellia brevispina tabulifera Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia capreola Steinböck, 1948 | | w | latest taxonomic authority | |
| Dalyellia cetica Reisinger, 1924 | | w | latest taxonomic authority | 165-166 |
| Dalyellia chlynovica Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia chlynovica occidentalis Nasonov, 1920 | | w | latest taxonomic authority | |
| Dalyellia complicata Fuhrman, 1914 | | w | latest taxonomic authority | |
| Dalyellia cuspidata quinquedentatus Sekera, 1906 | | w | latest taxonomic authority | |
| Dalyellia cuspidata sexdentatus (Sekera, 1906) | | w | latest taxonomic authority | |
| Dalyellia cuspidata triclinica Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia diadema Hofsten N, 1907 | | w | latest taxonomic authority | |
| Dalyellia dissimilis Szynal, 1932 | | w | latest taxonomic authority | |
| Dalyellia dubitativa Sibiriakova, 1929 | | w | latest taxonomic authority | |
| Dalyellia eastmani Graff, 1911 | | w | latest taxonomic authority | |
| Dalyellia erivanica (Plotnikow, 1906) | | w | latest taxonomic authority | |
| Dalyellia erythrocephala Steinböck, 1949 | | w | latest taxonomic authority | |
| Dalyellia euchroa Gieysztor, 1926 | | w | latest taxonomic authority | |
| Dalyellia expedita Hofsten N, 1907 | | w | latest taxonomic authority | |
| Dalyellia fairchildi Graff, 1911 | | w | latest taxonomic authority | |
| Dalyellia fairchildi oligochaeta Nasonov, 1924 | | w | latest taxonomic authority | |
| Dalyellia fairchildi polychaeta Nasonov, 1921 | | w | latest taxonomic authority | |
| Dalyellia fairchildi synchaeta Nasonov, 1921 | | w | latest taxonomic authority | |
| Dalyellia fibrosa Szynal, 1932 | | w | latest taxonomic authority | |
| Dalyellia foreli Hofsten N, 1907 | | w | latest taxonomic authority | |
| Dalyellia fulcrifera Weise, 1942 | | w | latest taxonomic authority | |
| Dalyellia fulinskii Szynal, 1932 | | w | latest taxonomic authority | |
| Dalyellia gracilis Fulinski & Szynal, 1927 | | w | latest taxonomic authority | |
| Dalyellia hallezii Graff, 1882 | | w | latest taxonomic authority | |
| Dalyellia hallezii borealis Eggers, 1925 | | w | latest taxonomic authority | |
| Dalyellia horrida Nasonov, 1923 | | w | latest taxonomic authority | |
| Dalyellia inermis Graff, 1911 | | w | latest taxonomic authority | |
| Dalyellia infundibuliformis (Fuhrmann, 1894) | | w | latest taxonomic authority | |
| Dalyellia japonica Okugawa, 1930 | | w | latest taxonomic authority | |
| Dalyellia karisalmica Nasonov, 1917 | | w | latest taxonomic authority | |
| Dalyellia karisalmica dupliparfera Weise, 1942 | | w | latest taxonomic authority | |
| Dalyellia karisalmica karisalmica Nasonov, 1917 | | w | latest taxonomic authority | |
| Dalyellia karisalmica oligochaeta Gieysztor, 1938 | | w | latest taxonomic authority | |
| Dalyellia karisalmica tabulifera Gieysztor, 1938 | | w | latest taxonomic authority | |
| Dalyellia kharkowiensis (Markow, 1904) | | w | latest taxonomic authority | |
| Dalyellia minima An der Lan, 1939 | | w | latest taxonomic authority | |
| Dalyellia mohicana Graff, 1911 | | w | latest taxonomic authority | |
| Dalyellia nasonovi Fulinski & Szynal, 1933 | | w | latest taxonomic authority | |
| Dalyellia ornata Hofsten N, 1907 | | w | latest taxonomic authority | |
| Dalyellia pachyderma Steinböck, 1931 | | w | latest taxonomic authority | |
| Dalyellia pallida Hofsten N, 1907 | | w | latest taxonomic authority | |
| Dalyellia pavimentata Beklemischev, 1926 | | w | latest taxonomic authority | |
| Dalyellia penicilla (Braun, 1885) | [with synonyms] | w | latest taxonomic authority | 161-162 |
| Dalyellia penicilla diminuta Gieysztor, 1929 | | w | latest taxonomic authority | 162-163 |
| Dalyellia penicilla endoramula Weise, 1942 | | w | latest taxonomic authority | |
| Dalyellia penicilla henophora Weise, 1942 | | w | latest taxonomic authority | 163 |
| Dalyellia penicilla variiramosa Szynal, 1932 | | w | latest taxonomic authority | 163 - diagnostic features too uncertain, taxon not valid |
| Dalyellia polychaeta Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia quadridens (Bohmig, 1897) | | w | latest taxonomic authority | |
| Dalyellia rhombigera Plotnikow, 1905 | | w | latest taxonomic authority | |
| Dalyellia rochesteriana Graff, 1911 | | w | latest taxonomic authority | |
| Dalyellia rossi tennesseensis Ruebush & Hayes, 1939 | | w | latest taxonomic authority | |
| Dalyellia rubra caucasica Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia rubra frankia Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia rubra intermedia Gieysztor, 1931 | | w | latest taxonomic authority | |
| Dalyellia rubra macrovariata Weise, 1942 | | w | latest taxonomic authority | |
| Dalyellia styriaca Reisinger, 1924 | | w | latest taxonomic authority | 163-165 |
| Dalyellia tatrica Gieysztor, 1938 | | w | latest taxonomic authority | 166-168 |
| Dalyellia tatrica czarnohorica Gieysztor & Szynal, 1939 | | w | latest taxonomic authority | 168 |
| Dalyellia tridentata Szynal, 1932 | | w | latest taxonomic authority | |
| Dalyellia tsurugae Nasonov, 1929 | | w | latest taxonomic authority | |
| Dalyellia variospinosa Fulinski & Szynal, 1933 | | w | latest taxonomic authority | |
| Dalyellia virgulifera vjatkensis Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyellia viridis (Shaw, 1791) | [with synonyms] | w | latest taxonomic authority | 157-161 |
| Dalyellia viridis carolinensis Hyman, 1955 | | w | latest taxonomic authority | 160-161 |
| Dalyellia virginiana Ruebush, 1937 | | w | latest taxonomic authority | |
| Dalyellia zykovi Nasonov, 1919 | | w | latest taxonomic authority | |
| Dalyelliidae Fulinskiella Gieysztor & Szynal, 1939 | | w | latest taxonomic authority | 296 |
| Fulinskiella bardeaui (Steinböck, 1926) | [with synonyms] | w | latest taxonomic authority | 296-302 |
| Dalyelliidae Gieysztoria Ruebush & Hayes, 1939 | [with synonyms] | w | other taxonomic work | 170-172 |
| Gieysztoria (Marcusiella) okugawai (Ruebush & Hayes, 1939) | [with synonyms] | w | latest taxonomic authority | 267 |
| Gieysztoria (Marcusiella) thymara (Marcus, 1946) | [with synonyms] | w | latest taxonomic authority | 265-267 |
| Gieysztoria acariaia Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 262-263 |
| Gieysztoria bellis Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 214-215, Abb. 46 E-F |
| Gieysztoria beltrani (Gieysztor, 1931) | [with synonyms] | w | other taxonomic work | |
| Gieysztoria bergi (Beklemischev, 1927) | [with synonyms] | w | other taxonomic work | 215-216, Abb. 39 G |
| Gieysztoria bicoronaria (Fulinski, 1933) | [with synonyms] | w | latest taxonomic authority | 184 |
| Gieysztoria blodgetti (Silliman, 1884) | | w | latest taxonomic authority | 179 |
| Gieysztoria capreola (Steinböck, 1948) | [with synonyms] | w | latest taxonomic authority | 240 |
| Gieysztoria chlynovica (Nasonov, 1919) | [with synonyms] | w | latest taxonomic authority | 189 |
| Gieysztoria chlynovica occidentalis (Nasonov, 1920) | [with synonyms] | w | latest taxonomic authority | 190-191 |
| Gieysztoria cuspidata (Schmidt, 1861) | [with synonyms] | w | other taxonomic work | 172-178 |
| Gieysztoria cypris Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 263-264 |
| Gieysztoria diadema (Hofsten N, 1907) | [with synonyms] | w | latest taxonomic authority | 218-220, Abb. 37 E-I |
| Gieysztoria dodgei (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | 248-250 |
| Gieysztoria eastmani (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | 226-227 |
| Gieysztoria euchroa (Gieysztor, 1926) | [with synonyms] | w | latest taxonomic authority | 253 |
| Gieysztoria evelinae Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | |
| Gieysztoria expedita (Hofsten N, 1907) | [with synonyms] | w | latest taxonomic authority | 179-183 |
| Gieysztoria expedita italica Luther, 1955 | | w | latest taxonomic authority | |
| Gieysztoria foreli (Hofsten N, 1911) | [with synonyms] | w | latest taxonomic authority | 222-223, Abb. 7 F-G, 11 B, 29 C, 36 N-O |
| Gieysztoria hymanae Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 258-259 |
| Gieysztoria inflata (Okugawa, 1930) | [with synonyms] | w | latest taxonomic authority | 215, Abb. 46 M |
| Gieysztoria infundibuliformis (Fuhrmann, 1894) | [with synonyms] | w | latest taxonomic authority | 244-248 |
| Gieysztoria intricata Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 254-256 |
| Gieysztoria japonica (Okugawa, 1930) | [with synonyms] | w | latest taxonomic authority | 185 |
| Gieysztoria knipovici (Beklemischev, 1953) | [with synonyms] | w | other taxonomic work | 213, Abb. O-P |
| Gieysztoria koiwi (Eggers, 1925) | [with synonyms] | w | latest taxonomic authority | 248 |
| Gieysztoria lugubris (Reisinger, 1924) | [with synonyms] | w | latest taxonomic authority | 216-217, Abb. 39 D-E |
| Gieysztoria lugubris wigrensis (Gieysztor, 1938) | [with synonyms] | w | latest taxonomic authority | 217-218 |
| Gieysztoria macrovariata (Weise, 1942) | [with synonyms] | w | other taxonomic work | 209 |
| Gieysztoria minima (Riedel, 1932) | [with synonyms] | w | latest taxonomic authority | 212, Abb. 44 F |
| Gieysztoria oligocentra (Steinböck, 1948) | [with synonyms] | w | latest taxonomic authority | 225 |
| Gieysztoria ornata (Hofsten N, 1907) | [with synonyms] | w | latest taxonomic authority | 192-196 |
| Gieysztoria ornata drozdovicensis (Fulinski, 1915) | [with synonyms] | w | latest taxonomic authority | |
| Gieysztoria oryzae (Nasonov, 1929) | [with synonyms] | w | latest taxonomic authority | 185-186 |
| Gieysztoria quadridens (Bohmig, 1898) | [with synonyms] | w | latest taxonomic authority | 227-228 |
| Gieysztoria quadridensoides (Fuhrmann, 1914) | [with synonyms] | w | latest taxonomic authority | 228-229 |
| Gieysztoria rubra (Fuhrmann, 1894) | [with synonyms] | w | other taxonomic work | 202-208 |
| Gieysztoria rubra caucasica (Nasonov, 1919) | [with synonyms] | w | latest taxonomic authority | 207, Abb. 45 K |
| Gieysztoria rubra frankia (Nasonov, 1919) | [with synonyms] | w | latest taxonomic authority | 207, Abb. 39 B |
| Gieysztoria rubra intermedia (Gieysztor, 1931) | [with synonyms] | w | latest taxonomic authority | 207-208, Abb. 39 C |
| Gieysztoria sibirica (Plotnikow, 1905) | [with synonyms] | w | latest taxonomic authority | 220-222, Abb. 38 |
| Gieysztoria taurica (Nasonov, 1923) | [with synonyms] | w | latest taxonomic authority | 208, Abb. 45 L-M |
| Gieysztoria therapaina Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 254 |
| Gieysztoria thienemanni (Reisinger, 1933) | [with synonyms] | w | latest taxonomic authority | 264-265 |
| Gieysztoria transilvana (Paradi, 1882) | [with synonyms] | w | latest taxonomic authority | 267-268 |
| Gieysztoria triangulata (Robeson, 1931) | [with synonyms] | w | latest taxonomic authority | 250-252 |
| Gieysztoria triquetra (Fuhrmann, 1894) | [with synonyms] | w | other taxonomic work | 241-243 |
| Gieysztoria triquetra orientalis (Nasonov, 1929) | [with synonyms] | w | latest taxonomic authority | 243-244 |
| Gieysztoria tridesma Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 261-262 |
| Gieysztoria trisolena Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 259-260 |
| Gieysztoria virgulifera (Plotnikow, 1906) | [with synonyms] | w | other taxonomic work | 233-236 |
| Gieysztoria zykovi (Nasonov, 1919) | [with synonyms] | w | latest taxonomic authority | 184 |
| Jenseniidae Halammovortex Karling, 1943 | | w | other taxonomic work | 308 |
| Halammovortex eastmani (Graff, 1911) | | - | latest taxonomic authority | 308, 226-227 |
| Halammovortex lewisi (Jones & Ferguson, 1948) | [with synonyms] | w | latest taxonomic authority | 308, 313-314 |
| Halammovortex macropharynx (Meixner, 1938) | [with synonyms] | w | other taxonomic work | 311-313 |
| Halammovortex nigrifrons (Karling, 1935) | [with synonyms] | w | other taxonomic work | 308-311 |
| Jenseniidae Jensenia Graff, 1882 | | w | other taxonomic work | 314 |
| Jensenia agilis (Fuhrmann, 1900) | | w | latest taxonomic authority | |
| Jensenia angulata (Jensen, 1879) | [with synonyms] | w | other taxonomic work | 314-316 |
| Jensenia intermedia Graff, 1904-08 | | w | latest taxonomic authority | |
| Jensenia millportiana (Graff, 1882) | | w | latest taxonomic authority | |
| Jensenia obscura Plotnikow, 1905 | | w | latest taxonomic authority | |
| Jensenia oculifera de Beauchamp, 1927 | | w | latest taxonomic authority | |
| Jensenia pinguis (Silliman, 1884) | | w | latest taxonomic authority | |
| Jensenia quadrioculata (Abildgaard, 1879) | | w | other taxonomic work | |
| Jensenia serotina Dorner, 1902 | | w | latest taxonomic authority | |
| Jensenia spec. Ax, 1952 | | - | latest taxonomic authority | |
| Jensenia truncata (Abildgaard, 1879) | | w | latest taxonomic authority | |
| Dalyelliidae Microdalyellia Gieysztor, 1938 | | w | other taxonomic work | 91-94 |
| Microdalyellia abursalis (Ruebush, 1937) | [with synonyms] | w | latest taxonomic authority | 136-137 |
| Microdalyellia (Gieysztoria) acariaia Marcus, 1946 | | w | latest taxonomic authority | |
| Microdalyellia arctica (Nasonov, 1923) | [with synonyms] | w | latest taxonomic authority | 113-116 |
| Microdalyellia armigera (Schmidt, 1862) | [with synonyms] | w | other taxonomic work | 94-99 |
| Microdalyellia armigera chaetifera Nasonov, 1919 | | w | latest taxonomic authority | |
| Microdalyellia armigera scapulifera Nasonov, 1919 | | w | latest taxonomic authority | |
| Microdalyellia armigera unguifera Nasonov, 1920 | | w | latest taxonomic authority | |
| Microdalyellia armigera vinculosa (Szynal, 1933) | [with synonyms] | w | latest taxonomic authority | 99-100, Fig 28A |
| Microdalyellia armygera Valkanov, 1934 | | w | latest taxonomic authority | |
| Microdalyellia articulata (Graff, 1911) | | w | latest taxonomic authority | |
| Microdalyellia aspinosa (Szynal, 1932) | | w | latest taxonomic authority | |
| Microdalyellia (Gieysztoria) bellis Marcus, 1946 | | w | latest taxonomic authority | |
| Microdalyellia benacensis (Steinböck, 1932) | | w | latest taxonomic authority | |
| Microdalyellia bicornis (Nasonov, 1926) | [with synonyms] | w | latest taxonomic authority | 147-148 |
| Microdalyellia biwae (Okugawa, 1930) | [with synonyms] | w | latest taxonomic authority | 151 |
| Microdalyellia brevispina (Hofsten, 1911) | [with synonyms] | w | latest taxonomic authority | |
| Microdalyellia brevimana (Beklemischev, 1921) | [with synonyms] | w | other taxonomic work | |
| Microdalyellia brevimana nasonovi Gieysztor, 1938 | | w | latest taxonomic authority | |
| Microdalyellia circulobursalis (Ruebush, 1937) | [with synonyms] | w | latest taxonomic authority | 137-138 |
| Microdalyellia complicata Ruebush & Hayes, 1939 | | w | latest taxonomic authority | |
| Microdalyellia deses (Riedel, 1932) | [with synonyms] | w | latest taxonomic authority | 153-154 |
| Microdalyellia diadema (Hofsten, 1907) | | w | latest taxonomic authority | |
| Microdalyellia dissimilis (Szynal, 1932) | [with synonyms] | w | latest taxonomic authority | |
| Microdalyellia erythrocephala (Steinböck, 1949) | [with synonyms] | w | latest taxonomic authority | 144 |
| Microdalyellia expedita (Hofsten N, 1907) | | w | latest taxonomic authority | |
| Microdalyellia fairchildi (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | 109-113 |
| Microdalyellia fibrosa (Szynal, 1932) | [with synonyms] | w | latest taxonomic authority | |
| Microdalyellia fulcrifera (Weise, 1942) | [with synonyms] | w | latest taxonomic authority | 152 |
| Microdalyellia fusca (Fuhrmann, 1894) | [with synonyms] | w | other taxonomic work | |
| Microdalyellia gilesi Jones & Hayes, 1941 | [with synonyms] | w | latest taxonomic authority | 138-140 |
| Microdalyellia groenlandica (Riedel, 1932) | [with synonyms] | w | latest taxonomic authority | 152-153 |
| Microdalyellia henophora (Weise, 1942) | [with synonyms] | w | latest taxonomic authority | 146-147 |
| Microdalyellia incerta (Bohmig, 1902) | [with synonyms] | w | latest taxonomic authority | 154 |
| Microdalyellia kessleri (Plotnikow, 1906) | | w | latest taxonomic authority | |
| Microdalyellia kharkowiensis (Markow, 1904) | [with synonyms] | w | latest taxonomic authority | 154-155 |
| Microdalyellia kupelwieseri (Meixner, 1915) | [with synonyms] | w | latest taxonomic authority | 100-103, Figs. |
| Microdalyellia lugubris (Reisinger, 1924) | | w | latest taxonomic authority | |
| Microdalyellia lugubris wigrensis Gieysztor, 1938 | | w | latest taxonomic authority | |
| Microdalyellia microphthalma (Vejdovsky, 1895) | [with synonyms] | w | latest taxonomic authority | 104-106 |
| Microdalyellia minima (An der Lan, 1939) | [with synonyms] | w | latest taxonomic authority | 151-152 |
| Microdalyellia minima (Riedel, 1932) | | w | latest taxonomic authority | |
| Microdalyellia mohicana (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | 116-117 |
| Microdalyellia mollosovi (Nasonov, 1920) | [with synonyms] | w | latest taxonomic authority | 144-145 |
| Microdalyellia nanella (Beklemischev, 1921) | [with synonyms] | w | latest taxonomic authority | 145-146 |
| Microdalyellia nassonovi Beklemischev, 1950 | | w | latest taxonomic authority | |
| Microdalyellia paucispinosa (Sekera, 1888) | [with synonyms] | w | latest taxonomic authority | 150 |
| Microdalyellia picta (Schmidt, 1848) | [with synonyms] | w | latest taxonomic authority | 124-127 |
| Microdalyellia pugiofera (Weise, 1942) | [with synonyms] | w | latest taxonomic authority | 147 |
| Microdalyellia rheesi (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | |
| Microdalyellia rochesteriana (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | 151 |
| Microdalyellia rossi (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | 128-133 |
| Microdalyellia rossi maxima Ruebush, 1937 | | w | latest taxonomic authority | 133-134 |
| Microdalyellia rossi minima Ruebush, 1937 | | w | latest taxonomic authority | 133 |
| Microdalyellia rossi virginiana (Ruebush, 1937) | | w | latest taxonomic authority | |
| Microdalyellia sawayai Marcus, 1946 | | w | latest taxonomic authority | 142-143 |
| Microdalyellia schmidtii (Graff, 1882) | [with synonyms] | w | latest taxonomic authority | 103-104 |
| Microdalyellia sillimani (Graff, 1911) | [with synonyms] | w | latest taxonomic authority | 134-135 |
| Microdalyellia tennesseensis (Ruebush & Hayes, 1939) | [with synonyms] | w | latest taxonomic authority | 141-142 |
| Microdalyellia tridentata (Szynal, 1932) | [with synonyms] | w | latest taxonomic authority | |
| Microdalyellia triseriata Beklemischev, 1950 | | w | latest taxonomic authority | 127-128 |
| Microdalyellia variospinosa (Fulinski & Szynal, 1933) | [with synonyms] | w | latest taxonomic authority | 149-150 |
| Microdalyellia virginiana (Ruebush, 1937) | [with synonyms] | w | latest taxonomic authority | 135-136 |
| Microdalyellia wiszniewskii Gieysztor, 1938 | | w | latest taxonomic authority | 178 |
| Dalyelliidae Sergia Nasonov, 1923 | | w | latest taxonomic authority | 268 |
| Sergia sergia (Beklemischev, 1918) | | w | latest taxonomic authority | |
| Dalyelliidae Varsoviella Gieysztor & Wiszniewski, 1947 | | w | latest taxonomic authority | 322 |
| Varsoviella kozminskii Gieysztor & Wiszniewski, 1947 | | w | latest taxonomic authority | 322 |
| Phaenocora megacephala (Higley, 1918) | [with synonyms] | w | other taxonomic work | |
| Castrada (Castrada) groenlandica Steinböck & Lanser, 1932 | | w | latest taxonomic authority | |
| Axia remanei (Ax, 1952) | | w | latest taxonomic authority | 321-322 |
| Dalyelliidae sp. Steinbock, 1948 | | - | latest taxonomic authority | |
| incertae sedis Mesovortex An der Lan, 1939 | | w | latest taxonomic authority | |
| Mesovortex stankovici An der Lan, 1939 | | w | latest taxonomic authority | |
| Prostomum marginatum Leidy, 1847 | | w | latest taxonomic authority | |
| incertae sedis Vortex Ehrenberg, 1831 | | w | latest taxonomic authority | |
| Vortex blodgetti Silliman, 1884 | | w | latest taxonomic authority | |
| Vortex caucasicus Plotnikow, 1906 | | w | latest taxonomic authority | |
| Vortex coronarius Schmidt, 1858 | | w | latest taxonomic authority | 180, 183 |
| Vortex coronarius Zykoff, 1902 | | w | latest taxonomic authority | |
| Vortex cuspidatus Schmidt, 1861 | | w | latest taxonomic authority | |
| Vortex cuspidatus sexdentatus Sekera, 1906 | | w | latest taxonomic authority | |
| Vortex erivanicus Plotnikow, 1906 | | w | latest taxonomic authority | 180 |
| Vortex graffii Hallez, 1878 | | w | latest taxonomic authority | 180 |
| Vortex kharkowiensis Markow, 1904 | | w | latest taxonomic authority | |
| Vortex rhombiger Plotnikow, 1905 | | w | latest taxonomic authority | 180 |
| Vortex sexdentatus Graff L, 1882 | | w | latest taxonomic authority | |
| Dalyelliidae Axia Luther, 1955 | | w | primary taxonomic authority (describer) | 318 |
| Dalyelliidae Beauchampiella Luther, 1955 | | w | primary taxonomic authority (describer) | 317 |
| Castrella Castrella Luther, 1955 | | w | primary taxonomic authority (describer) | |
| Castrella (Castrella) alba Luther, 1955 | | w | primary taxonomic authority (describer) | 281-284, Abb. 48 B-E, 49 C |
| Castrella Nasonoviella Luther, 1955 | | w | primary taxonomic authority (describer) | |
| Fulinskiella lapponica Luther, 1955 | | w | primary taxonomic authority (describer) | 302-303, Abb. 48 O, 50 E-F |
| Gieysztoria Marcusiella Luther, 1955 | | w | primary taxonomic authority (describer) | 265 |
| Gieysztoria beklemischevi Luther, 1955 | [with synonyms] | w | primary taxonomic authority (describer) | 244, Abb. 46 Q |
| Gieysztoria expeditoides Luther, 1955 | [with synonyms] | w | primary taxonomic authority (describer) | 186-189, Abb. 34 A-D, 35 A-C, F |
| Gieysztoria expedita italica Luther, 1955 | | w | primary taxonomic authority (describer) | |
| Gieysztoria italica Luther, 1955 | [with synonyms] | w | primary taxonomic authority (describer) | 191-192, Abb. 36 A-F |
| Gieysztoria macrovariata novemspinosa Luther, 1955 | | w | primary taxonomic authority (describer) | 209-212, Abb. 13 P, 18 D-F, 19 G, 37 A-C, 40 A-D, |
| Gieysztoria multiovata Luther, 1955 | | w | primary taxonomic authority (describer) | 229-231, Abb. 29 B, 30 A-E |
| Gieysztoria octospinosa Luther, 1955 | | w | primary taxonomic authority (describer) | 201-202, Abb. 40 E-K |
| Gieysztoria pseudoblodgetti Luther, 1955 | [with synonyms] | w | primary taxonomic authority (describer) | 179 |
| Gieysztoria subsalsa Luther, 1955 | | w | primary taxonomic authority (describer) | 200-201, Abb. 32 K, 34 G-I, 35 N-O, 36 H-k |
| Microdalyellia ohlsoni Luther, 1955 | | w | primary taxonomic authority (describer) | 106, Abb. 25 G-H |
| Microdalyellia ruebushi Luther, 1955 | [with synonyms] | w | primary taxonomic authority (describer) | 140-141, Abb.28 L |
| Dalyelliidae Vaillantiella Luther, 1955 | | w | primary taxonomic authority (describer) | 303 |
| Vaillantiella algerica Luther, 1955 | | w | primary taxonomic authority (describer) | 303-308 |
| Dalyellia brevimana Beklemischev, 1921 | | w | latest taxonomic authority | |
| Dalyellia aspinosa Ruebush, 1937 | | w | latest taxonomic authority | 140-141 |
| Gieysztoria maritima Luther, 1955 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Gieysztoria expedita expeditoides Luther, 1955 | | w | primary taxonomic authority (describer) | 186-189, Abb. 34 A-D, 35 A-C, F |
| Gieysztoria expedita expeditoides Luther, 1955 | | w | latest taxonomic authority | 186-189, Abb. 34 A-D, 35 A-C, F |
| ornata maritima Luther, 1955 | | w | primary taxonomic authority (describer) | 197-200 |
| Gieysztoria pavimentata (Beklemischev, 1926) | [with synonyms] | w | other taxonomic work | 237-240 |
| Gieysztoria pavimentata (Beklemischev, 1926) | [with synonyms] | w | other taxonomic work | 237-240 |
| Microdalyellia tsurugae (Nasonov, 1929) | [with synonyms] | w | latest taxonomic authority | 148-149 |
| Dalyellia pseudopenicilla Szynal, 1932 | | w | latest taxonomic authority | 163 |
| Dalyellia scoparia (Schmidt, 1858) | [with synonyms] | w | latest taxonomic authority | 168-170 |
| Vortex kessleri Plotnikow, 1906 | | w | latest taxonomic authority | 178 |
| Dalyellia expedita expeditoides Luther, 1955 | | w | primary taxonomic authority (describer) | 186-189, Abb. 34 A-D, 35 A-C, F |
| Gieysztoria uncia Marcus, 1946 | [with synonyms] | w | latest taxonomic authority | 225-226 |
| Gieysztoria semispinosa (Fulinski & Szynal, 1927) | [with synonyms] | w | latest taxonomic authority | 237 |
| Gieysztoria complicata (Fuhrmann, 1914) | [with synonyms] | w | latest taxonomic authority | 256-257 |
| Castrella (Castrella) trunquata Hofsten N, 1907 | | w | latest taxonomic authority | 272-281 |
| Castrella (Castrella) vernalis Beklemischev, 1921 | | w | latest taxonomic authority | 287-288 |
| Phaenocora megacephala (Higley, 1918) | [with synonyms] | w | other research on this sp. | 323 |
| Jenseniidae Axiola Luther, 1955 | [with synonyms] | w | other taxonomic work | |
| Vortex scoparius Schmidt, 1858 | | w | latest taxonomic authority | |
| Dalyellia penicilla penicilla Braun, 1885 | [with synonyms] | w | other taxonomic work | 163 |
| Microdalyellia fusca filifera (Nasonov, 1919) | | w | latest taxonomic authority | 107 (subspp not warranted) |
| Dalyellia nigropontica (Nasonov, 1919) | | w | latest taxonomic authority | 323 |