Proceedings of the National Academy of Sciences, Volume 123, Issue 18, May 2026. SignificanceAnnelids (ringed worms) possess an epidermis which secretes a collagenous cuticle prone to decay.
Therefore, they have relatively low fossilization potential and have left very few articulated body fossils. Previously reported annelid body ...
PNAS published a clinical update in Research Highlights on 20 Apr 2026. The item focuses on Polychaete annelids from the earliest Cambrian Period. Open the detail page to review the full original feed content.