Insights from sharks: Evolutionary and developmental models of fin development

@article{Cole2007InsightsFS,
  title={Insights from sharks: Evolutionary and developmental models of fin development},
  author={Nicholas J Cole and Peter David Currie},
  journal={Developmental Dynamics},
  year={2007},
  volume={236}
}
  • N. Cole, P. Currie
  • Published 1 September 2007
  • Biology, Environmental Science
  • Developmental Dynamics
The shark and its embryology have recently returned to the spotlight as a model animal in the quest to determine the origins of paired appendages during vertebrate evolution. As the most basal living gnathostomes, sharks and other extant chondrichthyans are ideal models to elucidate the developmental mechanisms utilised in mesoderm‐derived primitive fin morphologies. Chondrichthyans occupy a phylogenetic position and possess morphological structures that can answer major questions on the origin… 
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Citation Type

Body wall development in lamprey and a new perspective on the origin of vertebrate paired fins
TLDR
It is hypothesized that a persistent somatopleure in the lateral body wall is a gnathostome synapomorphy, and the redistribution of LPM was a key step in generating the novel developmental module that ultimately produced paired fins.
Was the tail bud the ancestral centre where the fin developmental program evolved in chordates
TLDR
Interestingly, in non-vertebrate chordates such as Amphioxus, it is possible to find a tail fin that during development expresses several genes that are conserved with other vertebrates’ limbs and tails, which could be considered as an evidence of potential co-option of the same genetic tool kit from the tail to the extremities.
Was the tail bud the ancestral centre where the fin developmental program evolved in chordates
TLDR
Interestingly, in non-vertebrate chordates such as Amphioxus, it is possible to find a tail fin that during development expresses several genes that are conserved with other vertebrates’ limbs and tails, which could be considered as an evidence of potential co-option of the same genetic tool kit from the tail to the extremities.
Developmental independence of median fins from the larval fin fold revises their evolutionary origin
TLDR
This work describes the transition from the larval fin fold into the median fins in zebrafish at the cellular and molecular developmental level and demonstrates that reduction does not play a role in the emergence of the dorsal fin primordium.
The evolutionary origins and diversity of the neuromuscular system of paired appendages in batoids
TLDR
The results suggest that muscles of paired fins have evolved via redeployment of the genetic program of MMPs that were already involved in dorsal fin development, and these muscles most likely have emerged as side branches of body wall neuromusculature and have been modified to adapt to distinct aquatic and terrestrial habitats.
The evolutionary origins and diversity of the neuromuscular system of paired appendages in batoids
TLDR
The results suggest that muscles of paired fins have evolved via redeployment of the genetic programme of MMPs that were already involved in dorsal fin development, and are likely to have emerged as side branches of body wall neuromusculature and have been modified to adapt to distinct aquatic and terrestrial habitats.
Dorsal fin development in flounder, Paralichthys olivaceus: Bud formation and its cellular origin.
Imaging With the Past: Revealing the Complexity of Chimaeroid Pelvic Musculature Anatomy and Development
TLDR
A more thorough examination of the anatomy and development of the pelvic musculature of a growth series of elephant shark embryos is enabled, revealing that chimaeroid musculatures are more complex than previously thought.
Evolutionary trends of the conserved neurocranium shape in angel sharks (Squatiniformes, Elasmobranchii)
TLDR
It is suggested that the morphological integration and biogeographic processes are the main drivers of their diversity, which might limit their capacity to display higher disparities since their origin.
Muscle development in the shark Scyliorhinus canicula: implications for the evolution of the gnathostome head and paired appendage musculature
TLDR
Analysis of the development of specific muscular units integrating the cephalic and appendicular musculature of the shark model, Scyliorhinus canicula, suggests that head tissues have contributed to the formation of the pectoral appendages in the common ancestor of extant gnathostomes.
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