EEB388H1 Study Guide - Midterm Guide: Thermoregulation, Muskrat, Dermal Bone
27 Oct 2015
School
Department
Course
Professor
Document Summary
Classification: mammals within the tree of life. Within the animalia tree, mammals are separated by having tissue, bilateral symmetry, deuterostome development. We share a clade with echinodermata. Closest relative are the reptiles. Class mammalia order, family, genus, species. Class mammalia [females have mammary glands to secrete milk for young] Simpson"s the principles of classification and a classification of mammals (1945). Infraclass metatheria [partially developed young, often have marsupium] Infrasclass eutheria [developed young, placenta with hormone secretion] The emerging molecular tree is much different than the prevailing morphological tree. 2004: molecules consolidate the placental mammal tree. 2012: phylogenomic datasets provide both precision and accuracy in estimating the timescale of placental mammal phylogeny. 2013: the placental mammal ancestor and the post- k- pg radiation of placentals. It is still highly debated the tree that forms the base of the living eutherian tree. Europe, and americas), dispersal and diversification may have happened at once: taxonomy & nomenclature.
