Monotremes and Marsupials Flashcards
monotreme vs marsupial reproduction
mono: oviparious, mammary glands but no nipples,
mars: viviparous - highly altricial, mammary glands and nipples,
What two families are in monotremata?
ornithorhynchidae
tachyglossidae
Primitive characters of monotremata
sprawled posture mammae w/o nipples cloaca oviparity no A.B. Epipubic bones
Derived characters of montremata
electroreception rhinariu highly modified limbs reduced dentition spurs
pectoral girdle in monotremata is more like a ____
therapsid
what metatherian order is diprotodont and didactylous?
paucituberculata
what metatherian order is polyprotodont and syndactylous
peramelemorphia
what metatherian order is diprotodont and syndactylous
diprotodontia
didelphimorphia
polyprotodont opposable clawless thumbs didactylous usually prehensile tail marsupium paired sperm
what metatherian orders are in america?
didelphimorphia
paucituberculata
microbiotheria
paucituberculata
diprotodont
didactylous
no marsupium
paired sperm
microbiotheria
nocturnal and arboreal polyprotodont didactylous stores fat in tail monotreme-like cloaca
australian metatherian orders
dasyuromorphia
peramelemorphia
notoryctemorphia
diprotodontia
dasyuromorphia
polyprotodont didactylous tasmanian devil tasmanian wolf numbat
Notoryctemorphia
no visible eyes
no pinnae
totally fossorial
Peramelemorphia
polyprotodont
syndactyly
insectivorous
Diprotodontia
syndactyly
diprotodont
herbivorous/2narily insectivorous
Family Phascolarctidae
koalas
Family Macropodidae
kangaroos ecological equivalent to antelope diprotodont diatemea mesial drift walk using tail
