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On the homologies of the skeletal components of catfish (Teleostei: Siluriformes) suspensorium
Diogo, R.; Oliveira, C.; Chardon, M. (2001). On the homologies of the skeletal components of catfish (Teleostei: Siluriformes) suspensorium. Belg. J. Zool. 131(2): 93-109
In: Belgian Journal of Zoology. Koninklijke Belgische Vereniging voor Dierkunde = Société royale zoologique de Belgique: Gent. ISSN 0777-6276, more
Peer reviewed article  

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Keywords
    Anatomy; Catfish; Chemical elements; Cranium; Evolution; Fish; Morphology; Morphology; Morphology; Ontogeny; Silurus; Amphiliidae Regan, 1911 [WoRMS]; Siluriformes [WoRMS]; Brackish water; Fresh water
Author keywords
    catfish; comparative anatomy; cranium; evolution; ethmoideal region;homologies; morphology; Ostariophysi; suspensorium; Siluriformes;suspensorium

Authors  Top 
  • Diogo, R.
  • Oliveira, C.
  • Chardon, M.

Abstract
    There has been much controversy concerning the identity of the components of the suspensorium in Siluriformes (catfishes). This confusion has implications not only for comparative morphology, but also for phylogenetic studies. The identity of the suspensorium components in catfish is reviewed here on the basis of: 1) dissections of numerous catfishes, including members of the most primitive group (Diplomystidae), and morphological descriptions in the literature; 2) developmental and paleontological data available; 3) functional morphology; and 4) comparisons with other member of the Ostariophysi, as well as with other teleosts. Our observations and comparisons indicate that catfish suspensorium consists of: 1) a hyomandibula+metapterygoid compound, which corresponds to the hyomandibula plus metapterygoid of other teleosts; 2) a symplectic+quadrate compound, which corresponds to the symplectic+quadrate of other teleosts; 3) an ectopterygoid+ectopterygoid compound, which corresponds to the entopterygoid plus ectopterygoid of other teleost. The small bones present in several catfishes between the anterior portions of the pars quadrata, the palatine, and the ethmoideal region are considered to be sesamoid ossifications.

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