动物进化：坚硬还是柔软的脊索起源？

Animal evolution: stiff or squishy notochord origins?

作者信息

Hejnol Andreas, Lowe Christopher J

机构信息

Sars International Centre of Marine Molecular Biology, University of Bergen, Norway; Hopkins Marine Station, Department of Biology, Stanford University, USA.

出版信息

Curr Biol. 2014 Dec 1;24(23):R1131-3. doi: 10.1016/j.cub.2014.10.059.

DOI:10.1016/j.cub.2014.10.059

PMID:25465334

Abstract

The notochord is considered an evolutionary novelty and one of the defining characters of chordates. A new study of an annelid challenges this view and proposes an earlier evolutionary origin in the most recent common ancestor of chordates and annelids.

摘要

脊索被认为是一种进化上的新事物，也是脊索动物的决定性特征之一。一项对环节动物的新研究对这一观点提出了挑战，并提出其在脊索动物和环节动物的最近共同祖先中具有更早的进化起源。