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CATEGORIES:Evolution and Development Seminar Series
SUMMARY:Gill arch serial homology and the origin of jawed 
 vertebrates - Andrew Gillis (University of Cambrid
 ge)
DTSTART;TZID=Europe/London:20150513T130000
DTEND;TZID=Europe/London:20150513T140000
UID:TALK57668AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/57668
DESCRIPTION:The jawed vertebrate body plan is defined largely 
 on the basis of two anatomical features: jaws and 
 paired appendages. In the late 19th century\, Carl
  Gegenbaur proposed that both jaws and paired fins
  were derived members of a primitive series of gil
 l arches. These controversial hypotheses of serial
  homology were based largely on the pharyngeal end
 oskeletal anatomy of chondrichthyan fishes (e.g. s
 harks\, skates and holocephalans). In this talk\, 
 I will give an overview of how I am using oviparou
 s (e.g. egg-laying) chondrichthyan fishes as exper
 imental embryological model systems\, to determine
  the extent to which similarities in endoskeletal 
 organization that led Gegenbaur to propose gill ar
 ch origins of jaws and fins reflect constraints im
 posed by common developmental mechanisms (i.e. ser
 ial homology)\, or rather convergent evolution.
LOCATION:Part II Lecture Theatre\, Department of Zoology
CONTACT:Marcia Kishida
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