Saturday, 14 September 2013

Extinct Creatures: Prehistoric Australian Megafauna


In distant ages, Australia was home to many marsupial giants which died out or evolved into the current forms which we know today. The latest thinking is that the earliest of Aboriginal tribes encountered these now extinct beasts and incorporated them into the legends of their Dreaming. Giant kangaroos, wombats the size of Volkswagens, giant goannas and snakes and marsupial lions are represented in this list. As in the case of lake monsters and ‘ape men’ across the world, the survival of these forebears is sometimes blamed for various recent cryptozoological appearances. An encounter with one of these beasts is normally highly unlikely but, as those who wilfully play around with the Plutonian Drug have discovered, “normal” is a relative term...

Anthropornis nordenskjoeldi

 
Fossil evidence for this creature abounds in the southern coastal regions of Australia and New Zealand. Essentially it is a massive penguin, roughly six feet in height and with an ‘elbow’ joint on its wings revealing a link to a flight-enabled distant ancestor. These birds were abundant in Antarctica 40 million years ago, but so far the fossil record cannot reveal if they were either blind or albino.

Bluff Downs Giant Python

 
Fossilized remains of this creature were first found in the Bluff Downs area in north-eastern Queensland. This giant serpent lived in the Pliocene Era and averaged about 10 metres in length, making it the largest snake, by a metre, ever to have lived on the planet, compared to the Anaconda or the Reticulated Python. Some feel that Aboriginal legends concerning the Rainbow Serpent are holdover memories of a time when humans interacted with these reptiles.

Another monstrous serpent – Wonambi naracoortensis – lived further south in the area around Adelaide in South Australia. It dates from the Pleistocene era and grew up to 6 metres in length. Its scientific name derives from the local tribal word for the Rainbow Serpent.

Carnivorous Kangaroo

 
Propleopus oscillans was a species of large kangaroo-rat which weighed up to 70 kilograms. Its dentition, as revealed in the fossil record, shows that it was capable of eating meat, but what is more likely is that it was a highly evolved scavenger, living mainly on insects, fruits and leaves, supplemented by stripping the occasional abandoned animal carcase. It died out about 20,000 years ago.

Diprotodonts

 
The Diprotodonts were a family of monstrous wombat-like creatures which averaged the size of large hippos. The largest of them reached 10 feet in length and 6 feet at the shoulder, weighing in at 2,000+ pounds. They roamed the arid and desert areas of Australia during the Pleistocene era. It is theorised that they may have been hunted to extinction by Aboriginal tribes around 40,000 years ago.

Procoptodon

 
The Procoptodon was a gigantic form of kangaroo, standing on average 10 feet tall and weighing around 230 kilograms (510 lbs). It had a shorter face than modern kangaroos with forward-facing eyes and two extra-long clawed fingers on each forepaw, supposedly allowing it to hook branches and other vegetation for ease of grazing. Unlike modern kangaroos, the Procoptodon had a single hoof-like toe on each foot allowing it to power through vegetation while jumping. It is thought that these creatures may have been alive as recently as 18,000 years ago.

Stirton’s Thunder Bird

 
This massive flightless bird is one of a genus of creatures called Dromornithids and appears to be a cul-de-sac in the evolution of modern waterfowl. The Thunder Bird stood over 3 metres tall and roamed in large flocks across the Australian continent. Some debate still occurs over whether they were carnivorous with recent discussion seeming to favour an omnivorous lifestyle - largely herbivorous but with some scavenging, similar to hyenas today. For many years Stirton’s Thunder Bird was thought to have been the largest flightless bird ever to have existed, but recent fossil discoveries of birds three times its size in China have nullified this record. Human impact on their environment is thought to be the reason behind their extinction around 18,000 years ago.

Thylacoleo carnifex

 
The Marsupial Lion was a cat-like mammal that was roughly the same size as a leopard. Examination of its skull has shown that it had, pound for pound, the strongest bite of any feline-type creature the world has ever known. It also had extremely strong forelimbs with semi-opposable thumbs and retractable claws (very unusual in a marsupial species). Its tail was similar to that of a kangaroo and allowed it to balance upright in order to bring all of its clawed limbs to bear in a fight. It lived during the Pleistocene era, hunting Diprotodonts and giant kangaroos, and is thought to have become extinct some 36,000 years ago.

Varanus priscus (aka. Megalania)

Essentially this was a goanna that grew from five to seven metres in length and which stood two metres tall at the shoulder. It would have been an ambush hunter capable of sudden and prolonged bursts of speed, with terrible claws and teeth used to despatch its victims; there is some continuing debate as to whether it may also have been venomous. The lizard became extinct roughly 40,000 years ago but may have had some interaction with the early human inhabitants of Australia.



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