Chinese-led team uncovers oldest known body fossils of ringed worms_蜘蛛资讯网
lids had already acquired a polychaete-like body plan in the Fortunian and that early members of the clade had diverged from their living sister group and differentiated into forms with both short and
of annelids in the Phanerozoic and suggest that the earliest Cambrian annelids may have differentiated into polychaete morphologies and that annelids may have had an evolutionary history prior to the