Looooong article. Go read.Darren Naish wrote:Why were elaborate cranial ornaments so diverse and so widespread in pterosaurs and Mesozoic dinosaurs? These structures – grouped together here as ‘cranial crests’ – vary markedly in form and position: they range from the semi-circular blades and keels present at the snout-tips of ornithocheiroid pterosaurs to the hollow tubes, fans and plate-like crests of lambeosaurine hadrosaurs and the bony frills of ceratopsians. Horns, hornlets, bosses, twin ridges and other structures decorate the skulls of various ornithischians and Mesozoic theropods, various pterosaurs possess sail-like crests, there are the thick skull domes of pachycephalosaurs, and so on. We can say with confidence that cranial ornamentation was common, if not ubiquitous, across Ornithodira (the clade of archosaurian reptiles that includes dinosaurs and pterosaurs)...
Did dinosaurs and pterosaurs practise mutual sexual selec...
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Did dinosaurs and pterosaurs practise mutual sexual selec...
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Re: Did dinosaurs and pterosaurs practise mutual sexual sele
They're not dinosaurs, they're proto-birds!
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Re: Did dinosaurs and pterosaurs practise mutual sexual sele
That's why they say dinos soar!Pappa wrote:They're not dinosaurs, they're proto-birds!
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