Rotularia (Annelida: Sabellida: Serpulidae) attached to the mid-Cretaceous Burmese amber

Rotularia Defrance is a common extinct genus of planispirally coiled fossil polychaete worms in the family Serpulidae from shallow marine environment. Here, we describe a large collection of Rotularia specimens attached to mid-Cretaceous Burmese amber. The fossil record of Rotularia serves as a valuable tool for calibrating polychaete evolution and suggests that the Burmese amber forest was likely situated not far from the seashore.