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  2. Echidna - Wikipedia

    en.wikipedia.org/wiki/Echidna

    While hatching, the baby echidna opens the leather shell with a reptile-like egg tooth. [22] Hatching takes place after 10 days of gestation ; the young echidna, called a puggle, [ 23 ] [ 24 ] born larval and fetus-like, then sucks milk from the pores of the two milk patches (monotremes have no teats ) and remains in the pouch for 45 to 55 days ...

  3. Monotreme - Wikipedia

    en.wikipedia.org/wiki/Monotreme

    Like birds and reptiles, monotremes have a single cloaca. [20] Marsupials have a separate genital tract, whereas most placental females have separate openings for reproduction (the vagina), urination (the urethra), and defecation (the anus). In monotremes, only semen passes through the penis while urine is excreted through the male's cloaca. [21]

  4. Ornithorhynchoidea - Wikipedia

    en.wikipedia.org/wiki/Ornithorhynchoidea

    Ornithorhynchoidea is a superfamily of mammals containing the only living monotremes, the platypus and the echidnas, as well as their closest fossil relatives, to the exclusion of more primitive fossil monotremes of uncertain affinity.

  5. Lost echidna: Egg-laying mammal named after David ... - AOL

    www.aol.com/strange-egg-laying-mammal-named...

    Attenborough’s long-beaked echidna, which was thought to be extinct, has stunned scientists after being filmed in a tropical forest in Indonesia for the first time.. The egg-laying mammal, named ...

  6. Short-beaked echidna - Wikipedia

    en.wikipedia.org/wiki/Short-beaked_echidna

    The short-beaked echidna (Tachyglossus aculeatus), also called the short-nosed echidna, is one of four living species of echidna, and the only member of the genus Tachyglossus. It is covered in fur and spines and has a distinctive snout and a specialised tongue , which it uses to catch its insect prey at a great speed.

  7. Endangered egg-laying mammal seen for the first time in over ...

    www.aol.com/news/endangered-egg-laying-mammal...

    There are only five existing species of monotremes: the platypus and four species of echidna. “To a biologist, the idea that that branch could go extinct would be a great tragedy,” Kempton said.

  8. Largest prehistoric animals - Wikipedia

    en.wikipedia.org/wiki/Largest_prehistoric_animals

    The largest known monotreme (egg-laying mammal) ever was the extinct long-beaked echidna species known as Murrayglossus hacketti, known from a couple of bones found in Western Australia. It was the size of a sheep, weighing probably up to 30 kg (66 lb).

  9. Fossil of new reptile species found in Brazil sheds light on ...

    www.aol.com/news/fossil-reptile-species-found...

    Named Gondwanax paraisensis, the four-legged reptile species was roughly the size of a small dog with a long tail, or about 1 meter (39 inches) long and weighing between 3 and 6 kg (7 to 13 pounds ...