Requested reference
Azevedo, G. H. F., Ott, R., Griswold, C. E. & Santos, A. J. (2016). A taxonomic revision of the ground spiders of the genus Apopyllus (Araneae: Gnaphosidae). Zootaxa 4178(3): 301-327. doi:10.11646/zootaxa.4178.3.1 -- Show included taxa