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Posts Tagged "palaeognaths"

Tetrapod Zoology

Inside the Cassowary’s Casque

Our montage depicting casque anatomy - see Naish & Perron (2014) for explanation. Note the big air space in the casque (visible in D) and the mass of trabeculae filling its anterior part (visible in B).

I’m a big fan of palaeognaths – the terrestrial bird group that includes the mostly big, flightless ratites and the chicken-sized, flight-capable tinamous. Among the most interesting, most aberrant of palaeognaths are also among the most poorly known. I’m talking about the black-plumaged, elaborately adorned cassowaries of eastern Australia, New Guinea, and various of the [...]

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Tetrapod Zoology

Controversies from the world of ratite and tinamou evolution (part I)

Palaeognath montage, featuring members of all recent lineages: ostriches, rheas, kiwi, emus, tinamous, moa, elephant birds, and cassowaries. Image by Darren Naish.

As blasphemous and offensive as it seems to say it, birds are pretty samey. Generally speaking, they’re small flying things with long forelimbs, proportionally large heads with big, globular braincases, and grasping feet where an enlarged first toe (the hallux) opposes the remaining three. A shape like this was – so both the fossil record [...]

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