Yamada, M. and de Moraes, G.J. 2020. A key to the species of Protogamasellus (Acari: Ascidae), with a new species from the Brazilian Pantanal. Zootaxa. 4801, 2 (Jun. 2020), 343–354. DOI:https://doi.org/10.11646/zootaxa.4801.2.8.