• Tetrastrum Chodat, 1895
• Tetrastrum alpinum (Schmidle) Schmidle, 1900
• Tetrastrum anomalum G.M. Smith accepted as Didymogenes anomala (G.M. Smith) Hindák, 1974
• Tetrastrum apiculatum (Lemmermann) Brunnthaler accepted as Crucigeniella apiculata (Lemmermann) Komárek, 1974
• Tetrastrum asymmetricum
• Tetrastrum constrictum
• Tetrastrum delicatospinosum L. Krienitz & G. Wachsmuth, 1991
• Tetrastrum divergens G.M. Smith
• Tetrastrum elegans Playfair, 1917
• Tetrastrum glabrum (Y.V. Roll) Ahlstrom & Tiffany
• Tetrastrum hastiferum (Arnoldi) Korshikov
• Tetrastrum heteracanthum (Nordstedt) Chodat, 1895
• Tetrastrum komarekii Hindák, 1977
• Tetrastrum multisetum (Schmidle) Chodat accepted as Micractinium pusillum Fresenius, 1858
• Tetrastrum parallelum Hortobagyi
• Tetrastrum pulloideum Teiling accepted as Crucigeniella apiculata (Lemmermann) Komárek, 1974
• Tetrastrum punctatum Ahlstrom & Tiffany accepted as Pseudotetrastrum punctatum Hindák, 1977
• Tetrastrum staurogeniaeforme (Schroeder) Lemmerman, 1900
• Tetrastrum staurogeniiforme (Schröder) Lemmermann, 1900
• Tetrastrum tenuispinum Hortobágyi, 1973
• Tetrastrum triacanthum Korshikov
• Tetrastrum triangulare (Chodat) Komárek, 1974