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Asian 'phoenix' lived with the dinosaurs

2011-08-10 16:59

Paris - Palaeontologists said on Wednesday they had found the fossilised remains of a giant bird that lived in Central Asia more than 65 million years ago, a finding which challenges theories about the diversity of early birds.

The creature may have been taller than an ostrich if it had been flightless and, if it flew, had a greater wingspan than that of the albatross, they reported in the British journal Biology Letters.

The scientists have named the bird Samrukia nessovi, after a mythological Kazakh phoenix known as the samruk, and after Lev Nessov, a celebrated Russian palaeontologist who died in 1995.

The estimate is based on a pair of mandibular rami, or the upright part of an L-shaped lower jawbone, that were found in Late Cretaceous sediment in Kyzylorda, southern Kazakhstan.

The bones measure 275mm, indicating a skull that would have been a whopping 30cm long.

Whether the bird flew and what it ate are unclear because the evidence is so sketchy.

Weight and height

But if the two bones are a guide, the beast would have stood up to 3m high and weighed more than 50kg if it had been flightless.

If it flew, the bird would have weighed at least 12kg, with a wingspan of at least 4m.

The avian was "an undisputed giant," says the study.

Birds are believed to have evolved from tiny two-footed dinosaurs called theropods at the start of the Cretaceous era, around 150 million years ago.

The prevailing theory, based on usually-incomplete fossils, is that they remained extremely small for tens of millions of years.

Of more than 100 types of early birds that have come to light, only one - Gargantua philoinos, which lived around 70 million years ago - was large-bodied. The others were crow-sized or smaller.

And even the claim for G philoinos is under attack. Some scientists argue the fossil was really that of a pterosaur, or flying reptile, rather than a bird.

Comments
  • JWock - 2011-08-10 17:44

    Sounds a lot like the dalmatian pelican. The dalmation pelican has a head/beak at 40cm (25% bigger than the one they found) - but is not called an "undisputed giant". The dalmatian pelican flies and has a wingspan smaller (3m) and is around the same weight or bigger, but only about 1.5m tall. I guess you can't assume the size of the bird just from the beak.

  • Phlegm - 2011-08-10 21:20

    As there is such a grey area between early birds and dinosaurs how do they figure that this is a giant bird, maybe it is just another species of dromeosaur? As I am no paleontologist this may be a silly question, but I am just wondering!

  • Flamewulf - 2011-08-10 22:17

    Yep, saw this story on Darren Naish's blog TetZoo over on the Scientific American site. Naish is one of the palaeontologists who described the species.

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