Earth's oldest 'Bobbit worm'

"Whilst the fossil record of polychaete worms extends to the early Cambrian, much data on this group derive from microfossils known as scolecodonts. These are sclerotized jaw elements, which generally range from 0.1–2 mm in size, and which, in contrast to the soft-body anatomy, have good preservation potential and a continuous fossil record."

https://www.researchgate.net/publication/313863716_Earth's_oldest_'Bobbit_worm'_-_Gigantism_in_a_Devonian_eunicidan_polychaete Tweet