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The Origins of Those Sexual Organs: a Fishy Tale Much More Primitive Than Previously Thought

posted by martyb on Friday July 20 2018, @01:18PM   Printer-friendly
from the mermaid:-a-fishy-tail-tale dept.

Phoenix666 writes:

Phys.org:

Fossil discoveries from the Devonian rocks of Scotland and Australia first revealed that the earliest jawed fishes, the placoderms, reproduced using copulation in much the same way as sharks and rays do today.

They also had the first paired pelvic skeletons, the precursor to the hind paired fins – and legs – of all animals. Their paired reproductive organs, called "claspers", probably developed in the same way as limbs.

The appearance of jaws and teeth in the first vertebrates was thus intimately linked to the origin of paired hind limbs (pelvic girdles) and an advanced kind of sexual reproduction.

The researchers found evidence that anatomical developments that enable copulation appeared earlier, in jawless fishes.

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  • (Score: -1, Offtopic) by Anonymous Coward on Friday July 20 2018, @01:24PM (3 children)

    by Anonymous Coward on Friday July 20 2018, @01:24PM (#709885)

    Michael David Crawford likes to hook up with poor women who are young enough to be his daughters.

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  • (Score: -1, Redundant) by Anonymous Coward on Friday July 20 2018, @01:43PM (1 child)

    by Anonymous Coward on Friday July 20 2018, @01:43PM (#709893)

    Michael David Crawford likes to hook up with poor women who are young enough to be his daughters.

    Good for him.

    • (Score: -1, Redundant) by Anonymous Coward on Friday July 20 2018, @02:26PM

      by Anonymous Coward on Friday July 20 2018, @02:26PM (#709923)

      MDC is the greatest!

  • (Score: 1) by DannyB on Friday July 20 2018, @04:47PM

    by DannyB (5839) Subscriber Badge on Friday July 20 2018, @04:47PM (#710005) Journal

    FYI . . . so does the president. By his own words. He would be dating his daughter if she weren't his daughter.

    --
    The lower I set my standards the more accomplishments I have.