Playboys didn’t invent sex, the fishes did!
Well, well, well, it turns out these prehistoric fishes were the pioneers of doing that nasty foreplay for about 385 million years ago.
Placoderms — ancient armored fish that also happen to be the earliest vertebrate ancestors of humans — were the first creatures to get down using interlocking genitalia.
Paleontologists at Flinders University in Southern Australia found out that male Microbrachius dicki, which belong to the placoderm fam, used bony L-shaped limbs to transfer sperm to females. “Microbrachius” means little arms, and scientists once believed that’s exactly what these limbs were. But it turns out the Microbrachius dicki actually had, a “dicki.”
Placoderms were once thought to be a dead-end group with no live relatives, but recent studies show that our own evolution is deeply rooted in placoderms and that many of the features we have — such as jaws, teeth and paired limbs — first originated with this group of fishes,” John Long, who lead the research, said in a statement.
They gave us the intimate act of sexual intercourse as well,” he added.
Lead scientist Professor John Long, from Flinders University in Adelaide, Australia, said:
Microbrachius means little arms but scientists have been baffled for centuries by what these bony paired arms were actually there for. We’ve solved this great mystery because they were there for mating, so that the male could position his claspers into the female genital area.”
Although proclaiming the finding, researchers said the act of intercourse would look very different – as the fish “did it” sideways, like a square dance.
With their arms interlocked, these fish looked more like they are square dancing the do-se-do rather than mating,” added Long.
From that new discovery, it then implied that external fertilisation evolved from internal fertilisation which is apparently involving sexual intercourse, and not the other way around.
Placoderms were once thought to be a dead-end group with no live relatives, but recent studies show that our own evolution is deeply rooted in placoderms, and that many of the features we have, such as jaws, teeth and paired limbs, first originated with this group of fishes. Now, we reveal they gave us the intimate act of sexual intercourse as well,” says Prof Long.
via BBC News