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Author (up) Gibson, J.C.; Larabee, F.J.; Touchard, A.; Orivel, J.; Suarez, A.V. url  doi
  Title Mandible strike kinematics of the trap-jaw ant genus Anochetus Mayr (Hymenoptera: Formicidae) Type Journal Article
  Year 2018 Publication Journal of Zoology Abbreviated Journal  
  Volume 306 Issue 2 Pages 119-128  
  Keywords catapult mechanism; comparative biomechanics; Formicidae; functional morphology; kinematics; mandible strike; power amplification  
  Abstract High-speed power-amplification mechanisms are common throughout the animal kingdom. In ants, power-amplified trap-jaw mandibles have evolved independently at least four times, including once in the subfamily Ponerinae which contains the sister genera Odontomachus and Anochetus. In Odontomachus, mandible strikes have been relatively well described and can occur in <0.15 ms and reach speeds of over 60 m s−1. In contrast, the kinematics of mandible strikes have not been examined in Anochetus, whose species are smaller and morphologically distinct from Odontomachus. In this study, we describe the mandible strike kinematics of four species of Anochetus representative of the morphological, phylogenetic, and size diversity present within the genus. We also compare their strikes to two representative species of Odontomachus. We found that two species, Anochetus targionii and Anochetus paripungens, have mandible strikes that overall closely resemble those found in Odontomachus, reaching a mean maximum rotational velocity and acceleration of around 3.7 × 104 rad s−1 and 8.5 × 108 rad s−2, respectively. This performance is consistent with predictions based on body size scaling relationships described for Odontomachus. In contrast, Anochetus horridus and Anochetus emarginatus have slower strikes relative to the other species of Anochetus and Odontomachus, reaching mean maximum rotational velocity and acceleration of around 1.3 × 104 rad s−1 and 2 × 108 rad s−2, respectively. This variation in strike performance among species of Anochetus likely reflects differences in evolutionary history, physiology, and natural history among species. © 2018 The Zoological Society of London  
  Address Department of Animal Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States  
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  Area Expedition Conference  
  Notes Export Date: 15 October 2018 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 826  
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