-2,277 extant species
-42% of extant mammals
-Found everywhere but Antartica & a few isolated islands
-Largest rodent ever was 8ft long 2,000 lbs
-Specialized for gnawing; rodere='to gnaw' dent='tooth'
-Single pair of ever-gr
Perissodactyla and Artiodactyla
-Perissodactyla are the odd toes ungulates and artiodactyla are the even toed ungulates
-When referring to them together they are ungulate which means hoofed animal
-Ungulates appeared around 55
Reproduction is expensive for females!
-Females have bigger gametes
-Nourishment for uterus
-A sequence of reproductive events at regular intervals in a mature female
-Follicular phase (follicle means sac), luteal pha
What is systematics?
-Describes and classifies organisms &Explore the historical relationship among them
-(1) Identify and name species
-(2) Classify these species into more inclusive groups
-(3) Describe historical relationship among th
Order Cetacea (whales, dolphins, porpoises)
-Baleen Whales; suborder mysticeti 13 species.
I. large in body size
ii. baleen composed of keratin used in fliter feeding
iii. 'whale bone'
"The first"or "Primary animals"
-376 extant species
-New world primates found in central America and most of South America
-Old wolrd primates found in Africa, Madagascar, and Asia
-Most are found in tropical or subtropical regions
-There are 4 factors to consider in explaining the current distribution of mammals in Michigan
1. When did they arrive in Michigan?
4. Human impacts
1. All Michigan mammals are newcomers
-Asian elephant; Elephas maximus
-African bush elephant; Loxodonta africana
-African forest elephant; Loxodonta cyclotis
-African elephants; forests, deserts, and scrub
-Asian elephants; only forests
-Earliest members of order carnivores
I. Miacids 55 MYA
II. Small weasel-like
III. Well-developed carnassials
I. coincides with the radiation of grasslands and associated prey
-Pleistocene 10,000 YA
-The study of the evolution of social behavior
-Has some genetic basis
-Affects the reproductive success of an individual
What upset people about sociobiology by E.O Wilson
-Made it seem that people had no