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SUMMARY:Laying (turbanate) eyes on morphological novelties - Dr Isabel Alm
 udi (University of Barcelona)
DTSTART:20230531T120000Z
DTEND:20230531T130000Z
UID:TALK199222@talks.cam.ac.uk
CONTACT:Thea Edith Kongsted
DESCRIPTION:Evolutionary innovations are biological revolutions: new organ
 s are critically associated with the emergence of new species and their ex
 ploitation of new niches. Despite their importance in the history of life\
 , how morphological novelty arises and evolves is a long-standing question
  in Evolutionary Biology. How the genetic network associated to the new st
 ructure appears? How this new structure is functionally and anatomically i
 ntegrated into the pre-existing body plan? One of the most striking exampl
 es of a sexually dimorphic novel structure occurs in males of the mayfly s
 pecies _Cloeon_ _dipterum_. _Cloeon_ males develop\, in addition to the co
 mpound eyes (shared by males and females)\, an extra pair of extremely lar
 ge dorsal\, turban-shaped eyes. Thus\, by comparing males versus females\,
  this mayfly species provides a privileged system to understand the origin
  and integration of new structures. To answer these questions\, we describ
 e the development of the eye and its integration with the optic lobes of m
 ale and female _Cloeon_ nymphs using confocal and electronic microscopy. F
 urthermore\, we compare sex-specific gene expression in nymphal heads at s
 ingle cell resolution\, to show how the highly conserved Retinal Determina
 tion Network (RDN) could have evolved to play a role in the origin of this
  novel sexually dimorphic visual organ.
LOCATION:Online
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