Ontogeny of the osteocranium in the African catfish, Clarias gariepinus Burchell (1822) (Siluriformes: Clariidae): Ossification sequence as a response to functional demands

Journal of Morphology
Dominique Adriaens, Walter Verraes

Abstract

The ontogeny of the bony skull of the African catfish, Clarias gariepinus, is studied from initial ossification until a complete skull is formed. The ossification sequence in C. gariepinus seems to be related to the functional demands that arise in a developing larva. Early ossification of the opercular bone coincides with the initiation of opercular skin movements. Early ossifications involve several dentulous bones, formed shortly before the transition phase from endogenous to exogenous feeding. The enlarging branchiostegal membrane becomes supported by the gradual adding of branchiostegal rays. Parasphenoid ossification may be related to protection of the brain during prey transport, whereas the several hyoid bones, including the parurohyal, are formed in relation to the increasing loads exerted onto the tendons of the sternohyoideus and consequently onto the hyoid bar. Overall skull reinforcement occurs almost simultaneously, with a whole set of perichondral bones arising especially at places of high mechanical load. The suspensorium becomes protected against dislocation in an anteroposterior direction through a ligamentous connection, which even becomes partially ossified, forming the sesamoid entopterygoid. Later, the cra...Continue Reading

References

Aug 1, 1996·Journal of Morphology·Carol C Cubbage, Paula M Mabee
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Jan 1, 1996·Journal of Morphology·Ione Hunt Von HerbingRobert G Boutilier
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Citations

Nov 6, 2018·Frontiers in Zoology·Aléssio Datovo, Pedro P Rizzato
Feb 24, 2011·Journal of Morphology·Frank HuysentruytDominique Adriaens
Feb 14, 2003·Evolution; International Journal of Organic Evolution·Jennifer Yeh
Oct 1, 2013·Evolution & Development·Sean M HarringtonChristopher A Sheil
Aug 27, 2010·Journal of Fish Biology·F HuysentruytD Adriaens
Aug 5, 2016·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Ali Nabavizadeh, David B Weishampel
Jan 2, 2021·PeerJ·María Laura Ponssa, Virginia Abdala
May 26, 2005·The Journal of Experimental Biology·Sam Van WassenberghAnthony Herrel

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