Biology 342 Over Simplified Phylogeny of Mammalia Memorize this Just kidding Monotremata Marsupalia Edentata Rodentia Lagomorpha Primates Chiroptera Carnivora Artiodactylia Cetcacea ID: 337199
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Stuart S. SumidaBiology 342(Over) Simplified Phylogeny of MammaliaSlide2
Memorize this.Slide3
Just kidding.Slide4
MonotremataMarsupaliaEdentataRodentiaLagomorphaPrimates
Chiroptera
Carnivora
Artiodactylia
Cetcacea
PerissodactyliaProboscideaSlide5
MonotremataMarsupaliaEdentataRodentiaLagomorphaPrimates
Chiroptera
Carnivora
Artiodactylia
Cetcacea
PerissodactyliaProboscidea
Mammalia
:
Mammary glands
Hair
Dentary-squamosal
jaw-joint
Dentary
– single bone of lower jaw
Three middle ear
ossicles
Muscles of facial expression
Muscular diaphragmSlide6
MONOTREMATA: Most basal of living mammals. Retain primitive anmiote feature of laying eggs.Includes only a few relict living forms including duckbilled platypus and spiny anteater.Slide7
MonotremataMarsupaliaEdentataRodentiaLagomorphaPrimates
Chiroptera
Carnivora
Artiodactylia
Cetcacea
PerissodactyliaProboscidea
Theria
:
Mammals with internal development
PlacentaSlide8
METATHERIA (Marsupalia):The pouch mammalsChoriovittiline (chorion + yolk sac) placentaLiving forms have epipubic
bones (the primitive
placentals
probably did as well.)
Restricted primarily to
Australi currently, though one form remains in North America (Didelphis; the Virginia oppossum).Slide9Slide10Slide11
Kangaroos can be almost orthogradeSlide12
MonotremataMarsupaliaEdentataRodentiaLagomorphaPrimates
Chiroptera
Carnivora
Artiodactylia
Cetcacea
PerissodactyliaProboscidea
Eutheira
:
“True placental mammals”
With extended internal development
ChorioallantoicplacentaSlide13
Mammalian Highlights / Features of Note:Primates are a very early offshoot within Mammalia.The relationships of basal mammals are not terribly clear – as noted by the polychotomy between edentates, glires (rodents + lagomorphs), primates, and bats.
Cetaceans are actually most closely related to artiodactyls (pigs actually)!
Elephants and their kin are amongst the most derived of mammals
Many, many
taxa
are left out here.