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Carboniferous Fish Fossil with Well-Preserved Retina

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ACFFAN69

ACFFAN69

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Interesting article which proves that "color vision existed a long time before the Jurassic period".

article said:
Dr Maeda and his colleagues studied the tissues in the fossilized eye of a 300-million-year-old fish, named Acanthodes bridgei.

The specimen – an extinct species of fish that resembles a small shark – was uncovered from the Upper Carboniferous Hamilton Formation in Kansas, the United States.

It was scanned under an electron microscope and further chemical analysis on the fossil showed evidence of cone cells and rods in the retina.

“This fossil fish eye is the first evidence to suggest animals saw in color as early as 300 million years ago,” said Prof Andrew Parker of the Natural History Museum in London, who is a co-author of the paper published in the journal Nature Communications.

Parts of the visual system are not usually preserved in the fossil record because the soft tissue of the eye and brain decay rapidly after death.

“It is the first case of color vision in an ancient, extinct animal, proving color vision existed a long time before the Jurassic period,” Prof Parker said.

The retina of Acanthodes bridgei is very well preserved, enabling paleontologists to find the first record of cone cells and rods in animals.

Prof Parker added: “these are both in the retina of a modern human and animal eye to enable color vision.”

“We can now use these techniques to examine color pigments in other ancient animals, bringing us closer to the time when color vision first evolved.”
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Also a somewhat related interesting video showing how different animals see the world:
 

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Sevrin said:
Why didn't you just post this in the existing Acanthodes with Beautiful Eyes thread?
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I first tried searching for "eyes" and got 195 pages of hits, so cancelled that search after 5 pages. I then did a search on retina and didn't find anything related. I then did a search on the science article threads but couldn't find a good fit.

I won't lie, after you posted this I did a search on "Acanthodes with Beautiful Eyes" in fear of a repost :oops:
 
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