Tuesday, July 5, 2016

New crocodilte species found in South Pacific - alas extinct. We probably ate it.

wikopedia
We are still finding the remains of large extinct animals - and this is one of them, the Mekosuchidae crocodile family (or, to be technical, possibly just a sub-family). This group includes one species which may have been a tree climber!
Mekosuchus kalpokasi the latest fossil discovery was a small croc, possibly one that lived on land rather than in the water. It was probably hunted to death when humans arrived three thousand years ago.
The jawbone was found in one of the islands of Vanuatu, (formerly the New Hebrides), 82 islands just southeast of the Solomon Islands. There is disagreement where the Meksuchian crocs fit into the family tree of crocodiles partly because there are only rare finds, though we know at least three species inhabited the South Pacific. Many species of crocs can live in the sea because they have salt glands in the tongue which can excrete the salt. So these kinds of extinct cros may have island hopped their way from Australia at a time when the sea level was lower and many small islands and coral reefs were above land.
Why is is extinct? Probably because the Lapita people arrived on the island and hunted it to extinction. Its remains were found at an archeological site suggesting that it was a food animal for the human arrivals. More detail here:
  • Mead et al., (2002), 'New extinct Mekosuchine crocodile from Vanuatu, South Pacific,' Copeia, vol 2002, 3, 632-641. With thanks to Matthew Spriggs, one of the authors.

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