Anatomy of the pharyngeal jaw apparatus of Zenarchopterus (Gill) (Teleostei : Beloniformes)

Tibbetts, I. R. and Carseldine, L. (2004) Anatomy of the pharyngeal jaw apparatus of Zenarchopterus (Gill) (Teleostei : Beloniformes). Journal of Morphology, 262 3: 750-759. doi:10.1002/jmor.10275


Author Tibbetts, I. R.
Carseldine, L.
Title Anatomy of the pharyngeal jaw apparatus of Zenarchopterus (Gill) (Teleostei : Beloniformes)
Journal name Journal of Morphology   Check publisher's open access policy
ISSN 0362-2525
Publication date 2004
Sub-type Article (original research)
DOI 10.1002/jmor.10275
Volume 262
Issue 3
Start page 750
End page 759
Total pages 10
Editor Frederick Harrison
Place of publication Hoboken
Publisher Wiley-Liss
Collection year 2004
Language eng
Subject C1
270503 Animal Anatomy and Histology
780105 Biological sciences
Abstract The structure of the pharyngeal jaw apparatus (PJA) of Zenarchopterus dispar and Z. buffonis, carnivorous estuarine and freshwater West-Pacific halfbeaks, was investigated using dissection, light, and scanning electron microscopy as part of a comparison with estuarine and marine herbivorous confamilials. The Zenarchopterus PJA differs from published descriptions of hemiramphid PJAs in that the otic capsules are less pronounced; the pharyngocranial articulation facet is trough-like; the third pharyngobranchials are ankylosed; the second pharyngobranchial anterior processes are relatively hypotrophied; all pharyngeal teeth except the posterior teeth in the fifth ceratobranchial face posteriorly; the muscularis craniopharyngobranchialis 2 posterior is short; the muscularis craniopharyngobranchialis 2 anterior is lacking, as is its insertion site, the inferior parasphenoid apophysis; the protractor pectoralis is well developed; the pharyngocleithralis internus originates dorsal to the level of the fifth ceratobranchial bony process; the fifth ceratobranchial bony processes are directed ventrolaterally; the opposing upper and lower tooth fields appear not to occlude erosively; and the muscular portion of the pharyngohyoideus is well developed anteriorly. The extent of these differences and their implications for the function of the PJA support recent molecular studies that suggest that the Hemiramphidae is polyphyletic. (C) 2004 Wiley-Liss, Inc.
Keyword Anatomy & Morphology
Halfbeak
Digestion
Myology
Osteology
Dentition
Arrhamphus-sclerolepis-krefftii
Genus Zenarchopterus
Hemiramphidae
Fish
Halfbeaks
Behavior
Ecology
Q-Index Code C1

 
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