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Science

Large Ocean Fossil Discovered in Nevada Could Hold Key To Aquatic Evolution (cbsnews.com) 31

An 8-foot-long skull discovered in the Augusta Mountains of Nevada is the largest fossil ever found from its time. The research team believes that the remarkable discovery could provide insight into how modern whales developed, and how to preserve their presence in our oceans. From a report: The fossil -- a newly discovered species of ichthyosaur, a type of large aquatic reptile -- dates to about 246 million years ago. The newly-named cymbospondylus youngorum is, according to the research team, the largest animal found from that time period, both in the sea and on land. It currently holds the title of the first giant animal to ever inhabit Earth. The well-preserved skull was excavated along with part of the creature's backbone, shoulder and forefin. At more than 55 feet long, the ichthyosaur was estimated to be the size of a large sperm whale, according to the study released Thursday by the American Association for the Advancement of Science and the Natural History Museums of Los Angeles County. The ichthyosaur has an elongated snout and conical teeth, leading researchers to believe it ate squid and fish. It also could have hunted smaller marine reptiles and younger members of its species.
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Large Ocean Fossil Discovered in Nevada Could Hold Key To Aquatic Evolution

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  • Artist rendering?! (Score:4, Interesting)

    by NFN_NLN ( 633283 ) on Friday December 24, 2021 @09:06PM (#62113477)

    Clicked to see the artist rendering of what it would look like... left disappointed.

    But found it here:
    http://www.sci-news.com/paleon... [sci-news.com]

  • by Anonymous Coward
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  • This doesn't sound right; a large, aquatic animal dated to 246MA? That would only allow only 6 million years for it to evolve/develop from, essentially, scratch, since the Permian Extinction is generally dated at 252MA.

    I'd be a lot more willing to accept that the beastie died in, or shortly before, the Permian Extinction, which killed off 80% of all life on the planet.

    • by quonset ( 4839537 ) on Friday December 24, 2021 @09:41PM (#62113527)

      This doesn't sound right; a large, aquatic animal dated to 246MA? That would only allow only 6 million years for it to evolve/develop from, essentially, scratch, since the Permian Extinction is generally dated at 252MA.

      I'd be a lot more willing to accept that the beastie died in, or shortly before, the Permian Extinction, which killed off 80% of all life on the planet.

      Didn't read the article, did ya?

      Paleontologists believe the ichthyosaurs grew exponentially within several million years, and that their growth was due in part to a massive increase in its prey, which included ammonoids and eel-like conodonts. These species' populations boomed after a mass extinction called the end-Permian Extinction.

      "That's one way this study stands out, as it allowed us to explore and gain some additional insight into body size evolution within these groups of marine tetrapods," said Dr. Jorge Velez-Juarbe, an associate curator of the Natural History Museum of Los Angeles County.

      The cymbospondylus youngorum is "a testament to the resilience of life in the oceans after the worst mass extinction in Earth's history," he added.

    • That would only allow only 6 million years for it to evolve/develop from, essentially, scratch...

      Saying that it is impossible for a completely and significantly different species to evolve in under 6 million years is a bit rich given that you are a member of what is clearly an incredibly unique species that evolved about 2 million years ago and whose present form has only been around for about 360,000 years.

      • Physically we're different, but we still all act like chimps. We've all thought about how nice it would to be to swinging from tree to tree instead of walking.

        My dog thinks we're all crazy for eating so much fruit when there is beef jerky available. I share apples and pears with my dog and she is disgusted by such monkey food. She would much rather eat the liver out of a rodent, maybe slurp the eyes out of the socket.

    • https://en.wikipedia.org/wiki/... [wikipedia.org] Evolution had long periods of relatively stable species and rapid changes in a short time frame. In geological timescale a few thousand generations counts as rapid. Six million years would be around 240,000 human generations.
    • Immediately after a mass extinction is when one could expect rapid evolution while ecologies rebuild and niches are filled.

    • That would only allow only 6 million years for it to evolve/develop from, essentially, scratch, since the Permian Extinction is generally dated at 252MA.
      Strange, that is exactly what is written in the article. Give or take a few million years I have the impression you are off a few 100 million years :P

      I'd be a lot more willing to accept that the beastie died in, or shortly before, the Permian Extinction, which killed off 80% of all life on the planet.
      But according to the data: it evolved after the Permian E

      • by jmccue ( 834797 )

        I'd be a lot more willing to accept that the beastie died in, or shortly before, the Permian Extinction

        Wait, FreeBSD is still alive, netcraft confirms it

  • Just yesterday the skull was 6.6 feet. Tomorrow I'm sure it will be 10 feet.
    • The scientific paper is not freely available (https://www.science.org/doi/10.1126/science.abf5787) but the abstract indicates that the skull is 2m. A round number like that is likely to be an approximation. Accurate sizes can be found in the Supplementary Material that is freely provided with the scientific paper (see the table, page 18).
      The skull length is given at 1890 mm (6.2 feet).
      The lower jaw length is given at 1970 mm (6.46 feet).
      One could wonder how the skull can be smaller than one of its parts. Th

      • One could wonder how the skull can be smaller than one of its parts. This is probably because anatomically speaking, the skull probably refers to the bone that compose the upper part of the head. The lower jaw is a separate bone.

        Also it is perfectly possible for the lower jaw (mandible plus several other bones) to be complete, but the rest of the skull to be missing some parts, particularly from the tip of the "nose" ("rostrum" in terms of bone names ; "snout" if you're relating it to mammals you're familia

  • Hunted fish and squid? Every good creationist knows they ate plants back then. Just look at it's pointy teeth perfect for tearing plants apart.

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