It's difficult to see how that could result from partial fission of the embryonic axis. Shouldn't it have two sets of wings, and maybe an extra head if that was the case? Conjoined twins are linked by the same body part aren't they? Although I've only looked at it in mammals, the earlier stages of embryonic development are extremely strongly conserved, so I doubt it's much different.
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u/michael-65536 29d ago
It's difficult to see how that could result from partial fission of the embryonic axis. Shouldn't it have two sets of wings, and maybe an extra head if that was the case? Conjoined twins are linked by the same body part aren't they? Although I've only looked at it in mammals, the earlier stages of embryonic development are extremely strongly conserved, so I doubt it's much different.