Taxon - Links and literature
Ruggiero M. (ed) (2008): World Bee Checklist [http://www.itis.gov/beechecklist.html], ITIS [as Perdita digressa Timberlake, 1968]Data retrieved on: 10 April 2010
Ruggiero M. (ed) (2008): World Bee Checklist [http://www.itis.gov/beechecklist.html], ITIS [as Perdita digressa Timberlake, 1968]