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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / On the homologies of the skeletal components of catfish (Teleostei : Siluriformes) suspensorium

R Diogo, C Oliveira, and M Chardon (2001)

On the homologies of the skeletal components of catfish (Teleostei : Siluriformes) suspensorium


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.

catfish; comparative anatomy; cranium; evolution; ethmoideal region; homologies; morphology; Ostariophysi; suspensorium; Siluriformes; suspensorium
  • ISSN: 0777-6276

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium


Annales de la Société malacologique de Belgique
​Annales de la Société royale malacologique et zoologique de Belgique
Annales de la Société Royale Zoologique de Belgique
Belgian Journal of Zoology