Short Communication

Journal of Ethology

, Volume 29, Issue 1, pp 177-180

First online:

A sticky situation: solifugids (Arachnida, Solifugae) use adhesive organs on their pedipalps for prey capture

  • Rodrigo H. WillemartAffiliated withSchool of Biological Sciences, University of NebraskaEscola de Artes Ciências e Humanidades, Universidade de São Paulo Email author 
  • , Roger D. SanterAffiliated withSchool of Biological Sciences, University of NebraskaDepartment of Life Sciences, Schrodinger Building, University of Limerick
  • , Andrew J. SpenceAffiliated withStructure and Motion Laboratory, Royal Veterinary College, University of London
  • , Eileen A. HebetsAffiliated withSchool of Biological Sciences, University of Nebraska

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Solifugids (Arachnida, Solifugae) have unique evertable adhesive organs on the tips of their pedipalps, named ‘suctorial’ or ‘palpal’ organs. Previous studies have shown that these organs enable solifugids to climb smooth glass-like surfaces and have hypothesized that these structures facilitate prey capture. Here, we use high-speed videography to demonstrate that the suctorial organs of Eremochelis bilobatus are its primary means of capturing insect prey. We also present calculations of the adhesive pressure exerted by these suctorial organs during real prey capture events.


Solifuge Adhesion Foraging Suctorial organ Palpal organ