Monotreme - Wikipedia
Monotremes (/ ˈ m ɒ n ə t r iː m z /) are mammals of the order Monotremata. They are the only group of living mammals that lay eggs, rather than bearing live young. The extant monotreme species are the platypus and the four species of echidnas. Monotremes are typified by structural differences in their brains, jaws, digestive tract ...
Monotreme | Definition, Characteristics, Reproduction, Examples ...
monotreme, (order Monotremata), any member of the egg-laying mammalian order Monotremata, which includes the amphibious platypus (family Ornithorhynchidae) and the terrestrial echidnas (family Tachyglossidae) of continental Australia, the Australian island state of Tasmania, and the island of New Guinea.
Monotreme - Definition, List, Examples, Characteristics, & Picture
2024年7月9日 · Monotremes are the only mammals that lay eggs to reproduce (oviparous), a form that diversified from the traditional live-bearing ones, which includes marsupials and eutherians. However, like other mammals, they possess body hair and mammary glands and are endothermic or warm-blooded.
Overview of the Animals Called Monotremes - ThoughtCo
2019年6月5日 · Monotremes (monotremata) are a unique group of mammals that lay eggs, unlike placental mammals and marsupials, who give birth to live young. Monotremes include several species of echidnas and the platypus.
Extreme Monotremes: Why Do Egg-Laying Mammals Still Exist?
2009年12月1日 · Only two kinds of egg-laying mammals are left on the planet today—the duck-billed platypus and the echidna, or spiny anteater. These odd “monotremes” once dominated Australia, until their ...
Monotremes: Incredible Mammals Who Lay Shelled Eggs
Monotremes are a special group of mammals who lay eggs instead of giving live birth. Monotremes are pretty rare – scientists only recognize a few living species – so many people have never heard of the term.
12.31: Monotremes - Biology LibreTexts
Monotremes are mammals that reproduce by laying eggs. The only living monotreme species are the platypus and echidnas (see Figure below and Figure below ). They are found solely in Australia and New Guinea (an island not far from Australia).
What is a monotreme? - The Australian Museum
Ornithorhynchus anatinus, is a unique Australian species. Along with echidnas, platypus are grouped in a separate order of mammals known as monotremes, which are distinguished from all other mammals because they lay eggs. The platypus and echidna have both survived by occupying ecological niches.
University of California Museum of Paleontology
Information about monotremes, including their evolution, characteristics, and examples of species.
monotreme - Students | Britannica Kids | Homework Help
Monotreme eggs are protected by a soft, leathery shell, like the eggs of reptiles. In both kinds of monotreme, the young break from the egg with the aid of an egg tooth and a fleshy nub called a caruncle, features that are also found in reptiles.