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SUMMARY:Timing and pattern of tooth eruption – Investigation of their ev
 olution in wild and domestic mammals - Madeleine Geiger (University of Cam
 bridge)
DTSTART:20181009T120000Z
DTEND:20181009T130000Z
UID:TALK110821@talks.cam.ac.uk
CONTACT:Robert Asher
DESCRIPTION:The development of just two generations of teeth throughout a 
 mammal’s life limits the functional longevity of the dentition. To prolo
 ng this functional lifespan\, various strategies have evolved\, including 
 changes of the sequence in which the teeth erupt. In particular\, ‘Schul
 tz’s rule’ predicts that replacement teeth (incisors\, canines\, and r
 emolars) tend to erupt earlier than posterior molars in slow-growing mamma
 ls with a ‘slow’ life history (e.g. humans)\, compared to mammals with
  a ‘fast’ life history (e.g.\, lemurs). Although Schultz’s rule has 
 been investigated in some clades\, its universal applicability and influen
 cing factors remain to be tested. Such investigations are especially impor
 tant regarding the study of life history in extinct taxa. In the studies I
  am going to present here\, we set out to investigate if Schultz’s rule 
 extends to the entire mammalian clade. In addition to wild mammalian speci
 es\, we also used domesticated mammals as a model for evolutionary changes
 \, as domestication has led to an accelerated life-history. Our results sh
 ow that evolution of tooth eruption sequences does correlate with life his
 tory\, but is also controlled by a range of other factors (e.g.\, jaw grow
 th).
LOCATION:Part II Lecture Theatre\, Department of Zoology \, Downing Street
 \, CB2 3EJ
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