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Development of the osteocranium in Corydoras aeneus (Gill, 1858) Callichthyidae, Siluriformes
Author(s) -
Huysentruyt Frank,
Geerinckx Tom,
Brunain Marleen,
Adriaens Dominique
Publication year - 2011
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.10935
Subject(s) - biology , skull , clearance , anatomy , evolutionary biology , zoology , medicine , urology
Abstract Development in the osteocranium of Corydoras aeneus was studied based on 48 cleared and stained specimens and 10 series of serial sections. Development overall follows the general trends observed in siluriform development, with ossifications appearing as a response to functional demands. Early development of the skull occurs in two distinct phases. In a first phase, several new bony elements, all of dermal origin and related to feeding, appear shortly after yolk depletion (4.4 mm SL). Between 5 and 8 mm SL, developmental priorities seem to shift to size increase of the cartilaginous skull and no new bony elements appear. Finally, a second phase of osteogenesis occurs from 8 to 18 mm SL, in which all remaining dermal and perichondral bones appear. J. Morphol. 2011. © 2011 Wiley‐Liss, Inc.