dragonfly larva
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Author(s):  
Sebastian Büsse ◽  
Alexander Koehnsen ◽  
Hamed Rajabi ◽  
Stanislav N. Gorb

AbstractDragonfly larvae capture their prey with a strongly modified -extensible- mouthpart using a biomechanically unique but not yet understood mechanism. The current opinion of hydraulic pressure being the driving force of the predatory strike can be refuted by our manipulation experiments and reinterpretation of former studies. On this fact, we present evidence for a synchronized dual-catapult system powered by two spring-loaded catapults. The power output of the system exceeds generally the maximum power achievable by musculature. Energy for the movement is stored by straining a resilin-containing structure at each joint and possibly the surrounding cuticle which is preloaded by muscle contraction. To achieve the precise timing required to catch fast-moving prey, accessory structures are used to lock and actively trigger the system, ensuring the synchronisation of both catapults. As a proof of concept, we developed a bio-inspired robotic arm resembling the morphology and functional principle of the extensible mouthpart. Our study elucidates the predatory strike of dragonfly larvae by proposing a novel mechanism, where two synchronized catapults power the ballistic movement of prey capturing in dragonfly larvae – a so-called synchronized dual-catapult system. Understanding this complex biomechanical system may further our understanding in related fields of bio inspired robotics and biomimetics.One Sentence SummaryThe synchronized dual-catapult, a biomechanically novel mechanism for the ballistic movement of prey capturing in dragonfly larvae


2018 ◽  
Vol 8 (8) ◽  
pp. 4303-4311 ◽  
Author(s):  
Estefania Quenta Herrera ◽  
Jérôme Casas ◽  
Olivier Dangles ◽  
Sylvain Pincebourde

2015 ◽  
Vol 44 (6) ◽  
pp. 595-603 ◽  
Author(s):  
Manuela Rebora ◽  
Silvana Piersanti ◽  
Gianandrea Salerno ◽  
Stanislav Gorb
Keyword(s):  

2015 ◽  
Vol 218 (21) ◽  
pp. 3399-3405 ◽  
Author(s):  
C. R. Sharkey ◽  
J. C. Partridge ◽  
N. W. Roberts

2013 ◽  
Vol 39 (1) ◽  
pp. 15-20 ◽  
Author(s):  
Masato MORIKAWA ◽  
Akihito AIZAWA ◽  
Tatsuaki KOBAYASHI
Keyword(s):  

1992 ◽  
Vol 14 (2) ◽  
pp. 73-84 ◽  
Author(s):  
Anita Johansson ◽  
Frank Johansson
Keyword(s):  

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