Class Mammalia

Characteristics of all Mammals Hair and Sweat Mammary Glands Endothermic Diaphragm

Three Classes ( do not put in packet) Monotremes Marsupials Placenta

Monotremes Egg laying – leathery eggs Echidnas and duck billed platypus

Marsupials Pouched mammary glands in pouch Infants are born not fully developed and move to pouch to finish development Different age babies can live in pouch at the same time Live mostly in Australia, New Guinea, and South America Kangaroos, opossums, koalas, Tasmanian devils, wallabies

Placental Most mammals are placental Embryos stay inside mother until fully developed Placenta are special attachments from embryo to uterus Placenta supplies food and oxygen Placenta also removes waste Gestation period is the time it takes for an embryo to develop Gestation ranges from a few weeks to almost 2 years depending on the species Humans are placental mammals

Toothless Mammals Only anteaters are completely toothless. The rest have small teeth Catch insects with long, sticky tongues Anteaters, aardvarks, armadillos, sloth

Insect Eating Also called insectivores Live everywhere except Australia and Antarctica Have very small brains Few specialized teeth thin long pointed nose

Rodents More than 1/3 of all mammals are rodents Found everywhere except Antarctica Most are small Have long, sensitive whiskers All rodents have sharp front teeth for gnawing

Lagomorphs (rabbits) Have sharp gnawing teeth Have two sets of incisors in their upper jaws Have short tails Sensitive noses, large ears, and eyes to detect predators

Flying Mammals Bats are the only mammals that can fly Use echolocation to find prey Nocternal Flying squirrels ARE NOT part of this group!

Carnivores Meat eaters Large canine teeth Can be found in both land and water Includes lions and seals

Hoofed Mammals Adapted for quick running Large flat molars for grinding, Herbivores Also known as Ungulates Two groups based on number of toes

Odd Toed Order Perissodactyls One or three toes Horses, tapirs, rhinos Tapirs have four toes on front but three on back

Even Toed Order Artiodactyla Two or four toes Foot has greater flexibility than Odd Toed Pigs, camels, cows, giraffes, hippos

Trunked-Nosed Elephants are the only ones Very agile trunk to pick up small objects Three species – African Savanna, Asian, and African Forest African Forest elephant is a newly name species Herbivores Largest land mammal Two year gestation period Poached for ivory

Cetaceans Whales, dolphins, porpoise Use echolocation Have lungs Blubber Blowholes are modified nostrils Some have teeth, some do not

Sirenia Manatees Herbivores AKA sea cows Can live for over 70 years

Primates Binocular vision Opposable thumbs Color vision Flattened nails Specialized teeth for omnivore diet Small noses so vision is very important