o Mammals in clade synapsidia
1 fenestra bounded by postorbital, jugal, squamosal
o Arose during Permian extinction
Synapsids originate in carboniferous dominate fauna in Permian
Major vert extinctions at end of Permian (1/
Vertebrate Bio Test 2
October 9, 2014
Invading Land land and air pose different physical challenges than water how do
vertebrates deal with these challenges?
LAND & AIR ARE DIFFERENT THAN WATER!
o PHYSICAL CHARACTERISTICS:
Vertebrates branch from craniate (outgroup craniates)
Mammal branch from Amniota
Shared characteristics= common ancestry
o Show changes in history like if new or handover trait
Diversity comes in form (shape, size, structure), function