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Chewing versus sex
Posted on 5/4/19 at 4:23 pm
Posted on 5/4/19 at 4:23 pm
:)
Chewing versus sex in duck-billed dinosaurs
Evolutionary bursts led to weird and wonderful head crests
Called the 'sheep of the Mesozoic'as they filled the landscape in the Late Cretaceous period, hadrosaurs walked on their hind legs and were known for their powerful jaws with multiple rows of extremely effective teeth. They also had hugely varied head display crests that signalled which species each belonged to and were used to attract mates. Some even trumpeted and tooted their special call, using nasal passages through the head crests.
Dr Albert Prieto-Márquez, co-author and world-leading expert on hadrosaurs from the Catalan Institute of Paleontology in Barcelona, added: "Our results suggest that evolution can be driven in different ways by natural selection and sexual selection. Hadrosaurs apparently fixed on a feeding apparatus that was successful and did not require massive modification to process their food. On the other hand, sexual selection drove the evolution of more complex crest shapes, and this is reflected by multiple evolutionary bursts."
Complete Story Here : ScienceDaily
Chewing versus sex in duck-billed dinosaurs
Evolutionary bursts led to weird and wonderful head crests
Called the 'sheep of the Mesozoic'as they filled the landscape in the Late Cretaceous period, hadrosaurs walked on their hind legs and were known for their powerful jaws with multiple rows of extremely effective teeth. They also had hugely varied head display crests that signalled which species each belonged to and were used to attract mates. Some even trumpeted and tooted their special call, using nasal passages through the head crests.
Dr Albert Prieto-Márquez, co-author and world-leading expert on hadrosaurs from the Catalan Institute of Paleontology in Barcelona, added: "Our results suggest that evolution can be driven in different ways by natural selection and sexual selection. Hadrosaurs apparently fixed on a feeding apparatus that was successful and did not require massive modification to process their food. On the other hand, sexual selection drove the evolution of more complex crest shapes, and this is reflected by multiple evolutionary bursts."
Complete Story Here : ScienceDaily
4
Posted on 5/4/19 at 6:58 pm to Trumansfangs
I suspect that Mother Nature has a weird of sense of humor.
Posted on 5/4/19 at 9:51 pm to Trumansfangs
Wouldn’t you love to have heard the sound the bottom specimen made? 
Posted on 5/5/19 at 2:48 am to Trumansfangs
quote:
tooted their special call
This'll do it every time.
Posted on 5/7/19 at 4:12 pm to Trumansfangs
quote:
Some even trumpeted and tooted their special call
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