Santos, J. C., R. C. Castilho, E. S. Silva, and G. J. de Moraes. “Two New Species of Rykellus (Acari: Mesostigmata: Ologamasidae) from Brazil and a Key to the World Species of the Genus”. Zootaxa, vol. 3926, no. 1, Mar. 2015, pp. 111–121, doi:10.11646/zootaxa.3926.1.5.