V. H.  Gonzalez and Ruz, L., ?New enigmatic Andean bee species of Protandrena (Hymenoptera, Andrenidae, Panurginae)?, Revista Brasileira de Entomologia, vol. 51, 2007.

V. H.  Gonzalez and Engel, M. S., ?Andinopanurgus, a new Andean subgenus of Protandrena (Hymenoptera, Andrenidae)?, ZooKeys, vol. 126, 2011.