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SUMMARY:Oviparous chondrichthyans as emerging models of vertebrate develop
 ment - Andrew Gillis\, Department of Physiology\, Development and Neurosci
 ence\, University of Cambridge\, UK
DTSTART:20111026T120000Z
DTEND:20111026T130000Z
UID:TALK33882@talks.cam.ac.uk
CONTACT:25355
DESCRIPTION:Andrew Gillis\n\nOviparous chondrichthyans as emerging models 
 of vertebrate development\n\nAs the sister group to bony fishes (including
  tetrapods)\, chondrichthyans represent a crucial phylogenetic data point 
 for studies addressing the origin and diversification of jawed vertebrates
 . Oviparous (e.g. egg-laying) chondrichthyans are particularly useful for 
 such studies\, as their mode of development makes them amenable to both ob
 servation and experimental manipulation. I will present three examples of 
 how experimental embryological studies using oviparous chondrichthyans hav
 e shed light on the evolution of important anatomical features of jawed ve
 rtebrates. These include: 1) The development of chondrichthyan branchial a
 ppendages\, and their relationship to paired fins/limbs\; 2) Dorsal-ventra
 l pharyngeal endoskeletal patterning\, and the serial homology of jaws and
  gill arches\; and 3) The embryonic origin of chondrichthyan electrorecept
 ive ampullary organs and mechanosensory neuromasts. These studies highligh
 t oviparous chondrichthyans as emerging models of vertebrate development\,
  and illustrate how developmental studies in phylogenetically informative 
 taxa can shed light on the origin of anatomical novelty. \n
LOCATION:Main Lecture Theatre\, Department of Zoology
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