Biological Invasions

, Volume 12, Issue 8, pp 2381–2383 | Cite as

Anthidium vigintiduopunctatum Friese (Hymenoptera: Megachilidae): the elusive “dwarf bee” of the Galápagos Archipelago?

  • Victor H. Gonzalez
  • Jonathan B. Koch
  • Terry Griswold
Invasion Note


The endemic large carpenter bee, Xylocopa darwini Cockerell, was the only known pollinator to the Galápagos Archipelago but as early as 1964 locals also spoke of the “dwarf bee of Floreana”. We report the presence of the wool carder bee, Anthidium vigintiduopunctatum Friese, on the island of Floreana and use a species distribution model to predict its distribution in the archipelago. We found that this species has the potential to invade almost one-third the surface area of the Galápagos Archipelago, primarily in low arid areas. Given that wool carder bees are uncommonly collected, we discuss whether this species is a previously undetected native bee or a recent adventive species to the Galápagos.


Anthidiini Carpenter bees MaxEnt Potential distribution Species distribution models Wool Carder bees 



We want to thank Joe Wilson, Molly Rightmyer, Claus Rasmussen and an anonymous reviewer for their comments and suggestions that improved this note. This study was supported in part by National Science Foundation grant DEB-0742998.


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Copyright information

© US Government 2009

Authors and Affiliations

  • Victor H. Gonzalez
    • 1
  • Jonathan B. Koch
    • 2
  • Terry Griswold
    • 1
  1. 1.USDA-ARS, Pollinating Insects Research UnitUtah State UniversityLoganUSA
  2. 2.Department of BiologyUtah State UniversityLoganUSA

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