Julia D Sigwart, Yunlong Li, Zeyuan Chen, Katarzyna Vončina, Jin Sun

Elife 2025 Apr 17:13:RP102542. doi:10.7554/eLife.102542

Still waters run deep in large-scale genome rearrangements of morphologically conservative Polyplacophora

“Heterozygocity ranging from almost 1% in Deshayesiella to 4.12% in Callochiton” “There are major changes [of karyotype] between congeners in different ocean basins (the Pacific A. rubrolineata) but also between two species in the NE Atlantic (A. discrepans and A. crinita) that are morphologically and ecologically almost indistinguishable.” “Living species of Lepidopleurida retain more plesiomorphic morphology and this clade has a deep fossil record extending to the lower Carboniferous; yet the exemplar of this order shows the most deviations from the reconstructed ancestral karyotype.”