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Particularities of the bucco-pharyngeal apparatus in Zenarchopterus kampeni (Pisces: Hemiramphida) and their probable significance in feeding
Vandewalle, P.; Lambert, V.; Parmentier, E. (2002). Particularities of the bucco-pharyngeal apparatus in Zenarchopterus kampeni (Pisces: Hemiramphida) and their probable significance in feeding. Belg. J. Zool. 132(2): 125-132
In: Belgian Journal of Zoology. Koninklijke Belgische Vereniging voor Dierkunde = Société royale zoologique de Belgique: Gent. ISSN 0777-6276; e-ISSN 2295-0451, more
Peer reviewed article  

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Keywords
    Biology > Zoology > Vertebrate zoology > Osteology
    Hemiramphidae Gill, 1859 [WoRMS]; Pisces [WoRMS]; Zenarchopterus kampeni
    Marine/Coastal
Author keywords
    Pisces; Hemiramphidae; cephalic morphology; osteology; myology

Authors  Top 
  • Vandewalle, P., more
  • Lambert, V.
  • Parmentier, E., more

Abstract
    The present study shows several new anatomical particularities of the buccal and pharyngeal parts of the halfbeak Zenarchopterus kampeni. The upper buccal jaw consists of premaxillaries and maxillaries tightly joined by ligaments. A 10° lowering of the mandible leads to a 30° elevation of the upper jaw. The adductor mandibulae is reduced to bundles A²and A omega. As in the Labridae, the lower pharyngeal jaw articulates with the scapular girdle. The upper pharyngeal jaw consists of distinct second pharyngobranchials followed by the third pharyngobranchials fused into a powerful posterior component. This part fits into and slides along a longitudinal ventral gutter of the neuroranium, thanks not only to the dorsal retractor muscles but also to specific retractors of the second pharyngobranchials. The power and dentition of the pharyngeal parts contrasts with the fragility of the buccal elements.

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