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Re: Alvarezsaur spurs (was Re: dino-lice)
On 02.05.2011 05:47, Jason Brougham wrote:
I believe there was a discussion on this thread regarding the low
energy content of a termite diet, and some question whether this
could fuel a cursor.
Does anyone know how energy expenditure scales with body size? Is
there any chance that this was a factor in driving a trend toward
smaller body size in advanced alvarezsaurs?
It may well be a factor in the extremely cursorial limb proportions of
parvicursorines, which must have allowed very energy-efficient
locomotion at any speed: femur long, tibia very long, metatarsus as long
as in birds that walk from the knee instead of from the hip, metatarsus
hyperarctometatarsal, toes short.