2025-01-08 ノースカロライナ州立大学
<関連情報>
- https://news.ncsu.edu/2025/01/scorching-climate-drove-lampreys-apart-during-cretaceous-period/
- https://royalsocietypublishing.org/doi/10.1098/rspb.2024.2101
ヤツメウナギの系統ゲノム解析により古代脊椎動物系統の最近の進化が明らかになった Phylogenomic resolution of lampreys reveals the recent evolution of an ancient vertebrate lineage
Lily C. Hughes,Devin D. Bloom,Kyle R. Piller,Nicholas Lang and Richard L. Mayden
Proceedings of the Royal Society B: Biological Sciences Published:08 January 2025
DOI:https://doi.org/10.1098/rspb.2024.2101
Abstract
Jawless vertebrates once dominated Palaeozoic waters, but just two lineages have persisted to the present day: lampreys and hagfishes. Living lampreys are a relatively small clade, with just over 50 species described, but knowledge of their evolutionary relationships has always been based on either a few mitochondrial genes or a small number of taxa. Biogeographers have noted the disjunct antitropical distribution of living lamprey families. Here, we present a comprehensive phylogenomic analysis of living and fossil lampreys, sampling 36 species with phylogenomic data and 46 in total with genetic data. We present new divergence time estimates based on comprehensive nuclear data and analysis of their diversification dynamics. Our analysis indicates a central role for extreme global warming during the Late Cretaceous Cenomanian–Turonian Boundary Event as a likely cause for the antitropical distribution of living lampreys, and a notable increase in lineage diversification in Northern Hemisphere lampreys during the Miocene corresponding with a period of global cooling.
