Evolution of myogenesis in fish: a sturgeon view of the mechanisms of muscle development

Anatomy and Embryology
Peter SteinbacherW Stoiber

Abstract

Patterns of initial muscle formation are well documented for teleost fish. Here, attention is focused upon sturgeons, which arose close to the base of the actinopterygian radiation and whose early development has remained largely unresearched. We demonstrate that some features of muscle development are common to both groups of fish, the most important being the origin and form of migration of adaxial cells to establish the superficial slow fibre layer. This, together with information on initial innervation and capillarisation, strongly suggests a common basis for muscle developmental mechanisms among fish. An important feature that is different between sturgeons and teleosts is that sturgeons lack any cellular dorsal-ventral separation of the myotome that involves the insertion of muscle pioneer (MP)-like cells at the site of the future horizontal septum. This, and information from other fish and from sarcopterygians, permits the supposition that such MP-defined dorsal-ventral separation is a teleost apomorphism. These and other findings are discussed in relation to their significance for the evolution of fish muscle developmental patterns.

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Citations

Sep 29, 2006·Anatomy and Embryology·Martin Scaal, Christoph Wiegreffe
Oct 20, 2007·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Nicolas FigeacKrzysztof Jagla
Jun 5, 2019·Journal of Developmental Biology·Samuel R Keenan, Peter D Currie
Aug 1, 2020·Animals : an Open Access Journal From MDPI·Lucia AidosAlessia Di Giancamillo
Feb 23, 2007·Developmental Dynamics : an Official Publication of the American Association of Anatomists·P SteinbacherW Stoiber

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