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Titolo:
The predatory legs of Philonthus marginatus (Coleoptera, Staphylinidae): functional morphology and tarsal ultrastructure
Autore:
Betz, O; Mumm, R;
Indirizzi:
Univ Kiel, Inst Zool, D-24098 Kiel, Germany Univ Kiel Kiel Germany D-24098 iv Kiel, Inst Zool, D-24098 Kiel, Germany Free Univ Berlin, Inst Biol, D-12163 Berlin, Germany Free Univ Berlin Berlin Germany D-12163 st Biol, D-12163 Berlin, Germany
Titolo Testata:
ARTHROPOD STRUCTURE & DEVELOPMENT
fascicolo: 2, volume: 30, anno: 2001,
pagine: 77 - 97
SICI:
1467-8039(200111)30:2<77:TPLOPM>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADHESION-CAPTURE APPARATUS; STENUS SPECIES COLEOPTERA; UNGUITRACTOR APPARATUS; LOCUST JUMP; MUSCLE; DESIGN; STRIKE; SPECIALIZATIONS; CLASSIFICATION; EVOLUTION;
Keywords:
fast actions; mechanosensilla; motion analysis; predation; spring mechanism; tenent setae;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Betz, O Univ Kiel, Inst Zool, Olshausenstr 40, D-24098 Kiel, Germany Univ Kiel Olshausenstr 40 Kiel Germany D-24098 4098 Kiel, Germany
Citazione:
O. Betz e R. Mumm, "The predatory legs of Philonthus marginatus (Coleoptera, Staphylinidae): functional morphology and tarsal ultrastructure", ARTHROP STR, 30(2), 2001, pp. 77-97

Abstract

Representatives of the staphylinid beetle Philonthus marginatus are characterized by highly modified raptorial forelegs which are used to strike preyin a particularly fast manner. Beetles ready to capture prey remain in a characteristic precapture ambush posture characterized by lifted and folded forelegs. Triggered by sensory input from the antenna or other parts of thefore body, the actual strike is released, essentially taking the form of arapid (about 9 ms) depression of the unfolding forelegs towards the prey. This movement is based on the presence of a coxo-trochanteral catch mechanism and a particularly wide angle of rotation in the coxo-trochanteral joint. It is made possible by the specific mechanics of this joint which probably also involves a co-contraction of the antagonistic trochantero-femoral flexor and extensor muscles suggesting a spring-loaded system. This phase of the strike is immediately followed by fixation of the prey by the ventral adhesive tarsal setae supported by a grasp of the flexing last tarsomere andthe claws. After withdrawal of the forelegs together with the prey, the sequence eventually results in the formation of a capture-basket formed frontally by the perpendicularly flexing head and laterally by the spiny inner sides of the coxae. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 18:52:55