2. ANCIENT SCOTTISH FISH
• Scientists studying fossils have discovered that the intimate act of sexual intercourse
was pioneered by ancient armored fishes, called placoderms, about 385 million years ago
in Scotland. In an important discovery in the evolutionary history of sexual
reproduction, the scientists found that male members of the Microbrachius dicki
developed bony L-shaped genital limbs called claspers to transfer sperm to females.
• Females, for their part, developed small paired bones to lock the male organs in place for
mating. Placoderms are the earliest vertebrate ancestors of humans.
3. CONTD…
• “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,“ said John Long, a paleontologist at Flinders University in South Australia who
led the research.
• This new finding, he added, shows that “they gave us the intimate act of sexual
intercourse as well“.
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