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17 Dec, 2023
không chỉ con đực, mà con cái của loài côn trùng có cánh ở Brazil cũng có dương vật...
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Penises (dương vật) come in many shapes and sizes in the animal kingdom. But usually they're only ever found on the sperm-owner (chủ sở hữu tinh dịch) of a species.
In the strange case of a tribe (bộ lạc) of cave-dwelling (hang động) winged insects (côn trùng có cánh) found in Africa and Brazil though, it's the egg-laying females who grow a phallus – albeit, not one that ejaculates (xuất tinh) sperm, although it plays a crucial role during sex.
It's clearly a winning idea for them too, seeing as the appendages (phần phụ) evolved more than once in their history.
You might know the primitive order of insects known as pscoptera better under their common names: barkflies or book lice.
Four years ago, a team of Japanese researchers discovered a genus of these insects in a Brazilian cave with some odd-looking sex organs. Researchers have now carried out phylogenetic (phát sinh ngoài) research on three members of a tribe within this order, to better understand why their respective reproductive bits function the way they do.
source: sciencealert,
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