Lemmerman (1914)

Lemmerman, E. (1914). Flagellatae I: Pantostomatinae, Promastiginae, Distomatinae. In: Pascher, A. (ed.). Die Süsswasser-Flora Deutschlands, Österreichs und der Schweiz, vol. 1, Jena: Gustav Fischer Verlag, .

"Flagellatae"

• "Appendix. Colorless flagellates of uncertain position" [p. 131]
  • Clautriavia
  • Errera
  • Polypseudopodius

Patterson (1993)

Patterson, D. J. 1993. The current status of the free-living heterotrophic flagellates. J. Euk. Microbiol. 40: 606–609.

"free-living heterotrophic flagellates"

• group B (taxa missing an ultrastructural identity)
  • Errera

Patterson, Vørs, Simpson, & O'Kelly, in Lee et al. (2000)

Patterson, D.J., Vørs, N., Simpson, A.G.B. & O'Kelly, C., 2000. Residual Free-living and Predatory Heterotrophic Flagellates. In: Lee, J.J., Leedale, G.F. & Bradbury, P. An Illustrated Guide to the Protozoa. Society of Protozoologists/Allen Press: Lawrence, Kansas, U.S.A, 2nd ed., vol. 2, p. 1302-1328, . See Brands, S.J. (1989–2015), .

• In “protozoa”
  • “flagellated protists”
    • “residual free-living and predatory heterotrophic flagellates”
      • 37. Genus Errera Schouteden, 1907