Thelodont Oeselia mosaica gen. et sp. nov. from the Wenlock and Ludlow of the East Baltic

A thelodont Oeselia mosaica gen. et sp. nov. is described from the Upper Wenlock and Lower Ludlow (Silurian) of Estonia and Latvia. The species has very small to small scales and shows low variation in scale morphology, simple branching dentine tubules, and a specific ultrasculpture with polygons of irregular shape, separated by narrow grooves.