Zeppelini, D., Taylor, S. J., & Slay, M. E. (2009). Cave Pygmarrhopalites Vargovitsh, 2009 (Collembola, Symphypleona, Arrhopalitidae) in United States. Zootaxa, 2204(1), 1–18. https://doi.org/10.11646/zootaxa.2204.1.1