Laboratory of T. H. Frazzetta.
The development, function, and design of amphicoelous vertebrae in teleost fishes1
Article first published online: 28 JUN 2008
Zoological Journal of the Linnean Society
Volume 58, Issue 3, pages 237–254, April 1976
How to Cite
LAERM, J. (1976), The development, function, and design of amphicoelous vertebrae in teleost fishes. Zoological Journal of the Linnean Society, 58: 237–254. doi: 10.1111/j.1096-3642.1976.tb00830.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Accepted for publication May 1975
The vertebral centra of teleost fishes are amphicoelous. They resemble biconid hour-glass shaped cylinders, the ends of which are concave.
The development, function, and design of the biconid amphicoelous shape of teleost centra are discussed in view of: the role of morphogenesis in the development of centra shape; function of the precaudal portion of the vertebral column in teleost locomotion; design of the centra as an adaptive response to functional problems.
The biconid portion of the centrum is formed in compact bone by ossification within the cylindrically arranged sclerotome. The characteristic biconid shape is controlled by alternating dilation and constriction of the developing anlage, a result of differential growth of the sclerotome and notochordal sheaths. The shape of the biconid compactum is not correlated with stress distributions resulting from locomotion.
Much spongy bone is present in teleost centra; it surrounds the compact biconid and forms longitudinal bars of bone along the lateral margin of the centra. Spongy bone is derived from sclerotomal mesemchyme. The time for formation, its position, and alignment of bony trabeculae within the spongy bone suggests it to be deposited in response to mechanical stresses.