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SUMMARY:The earliest tetrapods: What were they\, and what are they? - Jenn
 y Clack
DTSTART:20120307T190000Z
DTEND:20120307T203000Z
UID:TALK35523@talks.cam.ac.uk
CONTACT:20329
DESCRIPTION:When E.S. Goodrich coined the term tetrapod\, meaning a verteb
 rate with four legs (or\nwhose ancestors had them)\, there was a clear dis
 tinction between them and anything\nthat might have been called a 'fish'. 
 Only extant animals were considered at that time\,\nbecause the fossil rec
 ord of intermediate forms was more or less non-existent. Recent\nwork on t
 he earliest limbed vertebrates\, from the Late Devonian period about 375-3
 60\nmillion years ago\, has blurred the distinction between 'fish' and 'te
 trapods' as applied\nto fossil forms. We now know much more about the tran
 sition between these body forms from a wealth of discoveries over the last
  15 or 20 years. But this has brought problems of definition. What is a te
 trapod\, or rather how is the group Tetrapoda\ndefined? This\, and emergen
 t associated questions are highly controversial. This talk will introduce 
 some of the creatures that have been discovered\, and the different\,incom
 patible views that have been put forward as answers.
LOCATION:Pharmacology Lecture Theatre\, Department of Pharmacology\, Tenni
 s Court Road
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