monos "single"+ trema "hole“, reffering to the cloaca
o Kingdom: Animalia o Phylum: Chordata o Class: Mammalia o Subclass: Prototheria o Order: Monotremata o Families: o Kollikodontidae† o Steropodontidae† o Ornithorhynchidae - Platypus o Tachyglossidae o Tachyglossus – Short-beaked echidna o Zaglossus – Long-beaked echidna
Egg-laying mammals , they lay heavily yolked eggs. The egg is retained for some time within the mother, who actively provides the egg with nutrients. Endothermic Lacks pinna (has only ear slits) 3 bones in middle ear Brain lacks corpus callusom
They have no nipples, a milky fluid oozes out from modifies sweat glands onto tufts of hairs in shallow pits of the abdomen, from which the young lick it up. The monotreme leg bears a spur in the ankle region, the spur is non-functional in echidnas, but contains a powerful venom in the male Platypus.
Ornithorhynchidae Tachyglossidae Spends most of their time in the Terrestrial animals water. They have long, sticky tongues and They have webbed feet for stout claws to gather food. swimming and for walking on Armed with shard quills and rolls muddy river bottoms. into a ball for protection. Soft, rubbery, sensitive, beaklike Usually produces 1 egg only muzzle with which they detect invertebrates. 1 – 3 eggs
Tachyglossus - T. a. setosus Zaglossus - Zaglossus bruijni
o Kingdom: Animalia o Phylum: Chordata o Class: Mammalia o Subclass: Theria o Infraclass: Marsupialia o Order: Didelphimorphia Paucituberculata Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia
Non-placental mammals Yolk sac serves as placenta give birth to premature young climbs from the mothers birth canal to the nipples. it grabs on with its mouth and continues to develop Some marsupials have a rudimentary placenta that functions for only a short time, such as the bandicoot
females typically have an external pouch – “marsupium” in which the immature young are raised after birth until early infancy Short gestation times is due to having a yolk-type placenta in the mother marsupial (8-43 days)
Epipubic bones(both sexes; whether ornot they have pouches)
The female has two reproductive organ. Both open externally through one orifice, but lead to different compartments within the uterus. Males usually have a two-pronged reproductive organ, which corresponds to the females two reproductive organ.
Teeth are either diprotodont ("two front teeth") or polyprotodont ("many front teeth")
Digits are either didactylus (separate; ancestral state) or syndactylus ("fused toes")