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  1. #1
    Established TDF Member Eddie Clamp's Avatar
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    Mother snail labors for posterity in bed of mid-Cretaceous amber

    When seldom life history events serendipitously get documented by exceptional preservation in the fossil record, a unique telescopic opportunity arises for interpreting fossils within their paleoenvironment as well as for understanding ancestral relationships of current life forms. We present a rare glimpse of live birth by a terrestrial mother snail, incidentally, engulfed by amber as she released her young in a tropical forest during the mid-Cretaceous (early Cenomanian). The exceptional finding featuring the preservation of a snail’s 99-million-year-old soft-body together with five neonate shells represents the earliest known fossilized incidence of viviparity in a terrestrial snail. Based on high-resolution photographs and µCT scans, we describe the mother snail as a new species of cyclophoroid, Cretatortulosa gignens sp. nov. Our finding provides remarkable perspectives for interpreting gastropod evolution 80 million years earlier than the fossil record has known up to now. It shows that viviparity was already a relevant reproductive strategy in the Cretaceous, probably increasing the offspring’s survival chance in a predator-lurking tropical forest.


    https://www.sciencedirect.com/scienc...453?via%3Dihub

  2. #2
    Pedantic Pig Divemouse's Avatar
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    That has the feel of Google translate.
    Definitely don't doubt Dawn - not if you value your life

  3. #3
    Established TDF Member Eddie Clamp's Avatar
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    Quote Originally Posted by Divemouse View Post
    That has the feel of Google translate.
    Very likely as it came of the CONCH-L Digest :-)

  4. #4
    Hail the Children of LLyr
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    The first sentence gave me a headache. So many words in such a little space.
    "...are we human, or are we diver?"

  5. #5
    Established TDF Member
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    Quote Originally Posted by Eddie Clamp View Post
    a snail’s 99-million-year-old soft-body. evolution 80 million years earlier than the fossil record has known. probably increasing the offspring’s survival chance in a predator-lurking tropical forest.
    What a croc, so much for evolution and 99 million years of it, and we still have the little blighters still a snail and still the same species eating all the garden up. Shame this so called predator lurking in that tropical forest all those 80 million years ago didnt evolve a pair of teeth quick enought to crush the little blighters head in. And all we can do is thank the tree for evolving sap and the killer instinct to get the job done.

    Heck 80 or 99 million years of evolution take your pick by now you would think these snails would have evolved a pair of legs, grown a beard and be respected members of this divers forum. But no it's still a snail. I guess time drags when you move so slow.
    Maybe a one more million years would have done it just to make the 100 million mark.
    Last edited by iain/hsm; 21-07-2021 at 10:22 AM.

  6. #6
    Established TDF Member steelemonkey's Avatar
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    Why evolve when you are doing so well as you are?
    Where has evolution got the human race?

    Bad backs, difficult birthing, Alzheimer's, cancers and a predilection for self extinction.
    Only one million years and we are close to extinction.
    Paul.
    If God had meant us to breathe underwater, he would have given us larger bank balances.
    Human beings were invented by water as a means of moving itself from one place to another.


 

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