Allocrangonyx Schellenberg, 1937 (original description)
Allocrangonyx pellucidus (Mackin, 1935) (new combination reference)
Boruta americana Mackin, 1935 accepted as Synpleonia americana (Mackin, 1935) accepted as Stygonectes americanus (Mackin, 1935) accepted as Stygonectes alabamensis (Stout, 1911) accepted as Stygobromus alabamensis (Stout, 1911) (status source)
Crangonyx mucronatus Forbes, 1876 accepted as Bactrurus mucronatus (Forbes, 1876) (additional source)
Crangonyx putealis Holmes, 1909 accepted as Stygobromus putealis (Holmes, 1909) (status source)
Crangonyx vitreus (Cope, 1872) accepted as Stygobromus vitreus Cope, 1872 (source of synonymy)
Eocrangonyx Schellenberg, 1937 accepted as Procrangonyx Schellenberg, 1934 (original description)
Eucrangonyx alabamensis (Stout, 1911) accepted as Synpleonia alabamensis (Stout, 1911) accepted as Stygonectes alabamensis alabamensis (Stout, 1911) accepted as Stygobromus alabamensis alabamensis (Stout, 1911) (status source)
Eucrangonyx mucronatus (Forbes, 1876) accepted as Bactrurus mucronatus (Forbes, 1876) (status source)
Eucrangonyx robertsi Methuen, 1911 accepted as Crangonyx robertsi (Methuen, 1911) accepted as Sternophysinx robertsi (Methuen, 1911) (status source)
Eucrangonyx tenuis (S.I. Smith, 1874) accepted as Stygonectes tenuis (S.I. Smith, 1874) accepted as Synpleonia tenuis (S.I. Smith, 1874) accepted as Stygonectes tenuis tenuis (S.I. Smith, 1874) accepted as Stygobromus tenuis tenuis (S.I. Smith, 1874) (status source)
Niphargus antennatus (Packard, 1881) accepted as Crangonyx antennatus Packard, 1881 (additional source)
Stygobromus putealis (Holmes, 1909) (status source)
Stygobromus putealis (Holmes, 1909) (new combination reference)
Stygobromus vitreus Cope, 1872 (status source)
Stygonectes tenuis (S.I. Smith, 1874) accepted as Synpleonia tenuis (S.I. Smith, 1874) accepted as Stygonectes tenuis tenuis (S.I. Smith, 1874) accepted as Stygobromus tenuis tenuis (S.I. Smith, 1874) (new combination reference)
Synpleonia alabamensis (Stout, 1911) accepted as Stygonectes alabamensis alabamensis (Stout, 1911) accepted as Stygobromus alabamensis alabamensis (Stout, 1911) (new combination reference)
Synpleonia americana (Mackin, 1935) accepted as Stygonectes americanus (Mackin, 1935) accepted as Stygonectes alabamensis (Stout, 1911) accepted as Stygobromus alabamensis (Stout, 1911) (new combination reference)

Kentucky for Crangonyx mucronatus Forbes, 1876