Its spines are yellow with a black tip, whilst its snout appears to be a bluish-brown colour. 1914. Further evidence found in cave paintings, which depict creatures similar to Zaglossus hacketti, place both it and humans in the same timeframe. Zaglossus hacketti was an ancestor of the echidna, and was about a yard long. Previous Article 10 Facts â¦ Most significantly, many of the species represented are megafauna. Full reference: L. Glauert. Why were they here and nowhere else? Around 40 million years ago, North America was home to entelodonts, the carnivorous ancestors of hippopotamus who looked like pigs. Unfortunately for other Australian animals, like the giant long-beaked echidna (Zaglossus hacketti), we have found only scant evidence. Belongs to Zaglossus according to M. L. Augee et al. Long-beaked Echidna (Zaglossus bruijni), is from New Guinea. Around three feet (1 metre) long, this ancient species of long-beaked echidna lived in Western Australia during the Pleistocene era. It was about 1 meter long and probably weighed about 30 kg (66 lb). â¦ 2006. 9. Records of the Western Australian Museum 1(3):244-248. 10. Marsupials (Marsupialia) The largest-known marsupial is the extinct Diprotodon, about 3 m (9.8 ft) long, standing â¦ The reason the megafauna became extinct has been debated for many years with two main possibilities arising; climate change and/or the impact of the first humans. It was about 1 m long and probably weighed about 30 kg (66 lb). Taxonomy and detailed description of Zaglossus hacketti. Zaglossus hacketti was unknown to science until it was first identified from the Mammoth Cave fossil deposit in 1909. Indeed, for some of the extinct megafauna, scientists have found over 2,500 fossils. A Short Beaked Echidna is pictured with its snout to the surface of a wet rock. Other Articles you Might Like Liked it? Zaglossus hacketti is an extinct species of long-beaked echidna from Western Australia that is dated to the Pleistocene. Take a second to support Toptenz.net on Patreon! This giant extinct echidna weighed about 30 kg and stood around one metre tall (about the size of a sheep) making it the largest monotreme (egg laying mammal) to have ever lived. Monotremes (Monotremata) The largest-known monotreme (egg-laying mammal) ever was the extinct long-beaked echidna species known as Zaglossus 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). Zaglossus hacketti is an extinct species of long-beaked echidna from Western Australia that is dated to the Pleistocene.It is known only from a few bones. Like many of Australiaâs prehistoric megafauna, zaglossus hacketti disappeared around 12,000 years ago, perhaps because of human encroachment. This makes it the largest monotreme known to have ever lived. It had longer, straighter legs than any of the modern echidnas. Toggle Caption. It is known only from a few bones. Recent evidence suggests that the human Zaglossus hacketti . Haast's Eagleâ â¬/â â¬Pouakai (Harpagornis moorei, Hieraaetus moorei,â â¬possibly Aquila mooreiâ)This illustration is available as a printable colouring sheet (pre-orientated in portrait for easier printing). They are sometimes called âterminator pigsâ or âhell pigsâ. Gigantic Long Beaked Echidna (Zaglossus hacketti) This particular Echidna lived during the Upper Pleistocene era which was millions of years â¦ The echidna is an oval shape, with a ball-like appearance.