タコの遺伝子の詳細な解析により、これまで卵を産むかどうかでしか見分けられなかったタコのオスとメスを決定づける性染色体があることや、それが少なくとも約2億5000万年前にさかのぼる、既知の中で最古の起源を持つことがわかりました。
Cephalopod Sex Determination and its Ancient Evolutionary Origin Revealed by Chromosome-level Assembly of the California Two-Spot Octopus | bioRxiv
https://www.biorxiv.org/content/10.1101/2024.02.21.581452v2.full
Oldest known animal sex chromosome evolved in octopuses 380 million years ago
https://www.nature.com/articles/d41586-024-00637-0
Octopuses Might Have The Oldest Sex Chromosomes in The Animal Kingdom : ScienceAlert
https://www.sciencealert.com/octopuses-might-have-the-oldest-sex-chromosomes-in-the-animal-kingdom
Oldest known sex chromosome emerged 248 million years ago in an octopus ancestor | Live Science
https://www.livescience.com/animals/octopuses/oldest-known-sex-chromosome-emerged-248-million-years-ago-in-an-octopus-ancestor
（後略）
https://gigazine.net/news/20240311-octopuses-oldest-sex-chromosomes/
