Baicalellia opaca (Sibiriakova, 1929) Ruebush & Hayes, 1939 (new combination reference)
Dalyellia Fleming, 1822 (subsequent type designation)
Gieysztoria Ruebush & Hayes, 1939 (original description)
Gieysztoria chlynovica chlynovica (Nasonov, 1919) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria chlynovica occidentalis (Nasonov, 1920) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria lugubris (Reisinger, 1924) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria lugubris lugubris (Reisinger, 1924) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria lugubris wigrensis (Gieysztor, 1938) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria pavimentata (Beklemischev, 1926) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria quadridens (Böhmig, 1898) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria quadridensoides (Fuhrmann, 1914) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria rubra (Fuhrmann, 1894) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria rubra frankia (Nasonov, 1919) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria rubra intermedia (Gieysztor, 1931) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria rubra rubra (Fuhrmann, 1894) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria sibirica (Plotnikow, 1905) Ruebush& Hayes, 1939 (new combination reference)
Gieysztoria taurica (Nasonov, 1923) Ruebush & Hayes, 1939 (new combination reference)
Gieysztoria thienemanni (Reisinger, 1933) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia (Microdalyellia) Reubush & Hayes, 1939 (original description)
Microdalyellia abursalis (Ruebush, 1937) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia armigera (Schmidt, 1862) Gieysztor, 1938 (additional source)
Microdalyellia bicornis (Nasonov, 1926) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia biwae (Okugawa, 1930) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia brevimana (Beklemischev, 1921) Gieysztor, 1938 (additional source)
Microdalyellia brevispina (Hofsten, 1911) Gieysztor, 1939 (additional source)
Microdalyellia circulobursalis (Ruebush, 1937) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia fairchildi (Graff, 1911) Gieysztor, 1938 (additional source)
Microdalyellia fusca (Fuhrmann, 1894) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia microphthalma (Vejdovsky, 1895) Gieysztor, 1938 (taxonomy source)
Microdalyellia mohicana (Graff, 1911) Ruebush & Hayes, 1939 (basis of record)
Microdalyellia mollosovi (Nasonov, 1920) Gieysztor, 1938 (taxonomy source)
Microdalyellia nanella (Beklemischev, 1921) Gieysztor, 1939 (taxonomy source)
Microdalyellia paucispinosa (Sekera, 1888) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia picta (Schmidt, 1848) Gieysztor, 1938 (additional source)
Microdalyellia rheesi (Graff, 1911) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia rossi (Graff, 1911) Gieysztor, 1938 (additional source)
Microdalyellia schmidtii (Graff, 1882) Gieysztor, 1938 (taxonomy source)
Microdalyellia tsurugae (Nasonov, 1929) Ruebush & Hayes, 1939 (new combination reference)
Microdalyellia variospinosa (Fulinski & Szynal, 1933) Gieysztor, 1938 (taxonomy source)
Microdalyellia virginiana (Ruebush, 1937) Ruebush & Hayes, 1939 (new combination reference)
Provortex virginiensis Ruebush & Hayes, 1939 (original description)
Sergia sergia (Beklemischev, 1918) Nasonov, 1923 accepted as Neosergia sergia (Beklemishev, 1918) Li, 2023 (taxonomy source)