Scientific Name

Common Name




United States

Protandrena subdilatipes






Protodufourea wasbaueri


Data deficient




Sphecodogastra antiochensis


Critically imperiled




KEY: Vulnerable, at moderate risk of extinction because of restricted range, relatively rare populations (often 80 or fewer), recent and widespread declines, or other factors; data deficient, inadequate information for assessment of risk category because of a lack of information about population size or about threats to the population or because of taxonomic uncertainty about the validity of the taxon; critically imperiled, at high risk of extinction because of extreme rarity of populations (often 5 or fewer), steep declines, or other factors; possibly extinct, missing or known only from historical occurrences but with some hope of rediscovery; imperiled, at high risk of extinction because of highly restricted range, rare populations (often 20 or fewer), steep declines, or other factors.

SOURCE: Adapted from Shepherd, M.D., D.M. Vaughan, and S.H. Black (Eds). Red List of Pollinator Insects of North America. CD-ROM Version 1 (May 2005). Xerces Society for Invertebrate Conservation, Portland, Oregon,

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement