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originally posted by: Byrd
originally posted by: punkinworks10
a reply to: Byrd
Glyptodonts, think glyptodonts.
They are right size. There is talk of the similarity in body design between them and turtles. Recent work shows that tuttles shells and body plan are an adaptation to burrowing. Havent several glyptodnt fossils have been found rolled up in a ball, as though they had burrowed into the ground and died.
I've seen glyptodont fossils in the museum. They're about the size of a Shetland pony. Not that big. Those tunnels are larger than the hallways in your house/apartment.
Glyptodon measured 3.3 metres (11 ft) in length, 1.5 metres (4.9 ft) in height and weighed up to 2 tonnes (4,400 lb).
Rod monochromacy is a rare condition characterized by the absence of cone photoreceptor cells in the eyes of vertebrates. It results in colorblindness and low acuity vision in dim-light conditions and blindness in bright-light conditions. Xenarthrans most likely only used vision at night, during twilight, and while in burrows. However, the understory of South America's rainforests may have been dark enough during the day to facilitate limited vision for species that dwelled there. Extinct glyptodonts' tough carapace and large body size might have compensated for their inability to see approaching predators.