User:Abyssal/Portal:Silurian/DYK/2


 * ...that the Burgsvik beds, a geological formation exposed on Gotland, Sweden, contain the only fossil euglenid ever discovered?
 * ...that fossil Thelodont fish (depiction pictured) surprised scientists by showing that stomachs evolved before jaws?
 * ...that eighty years on, scientists are still debating whether the Palæozoic fossils known as Chitinozoans (SEM image pictured) represent plants, animals or eggs?
 * ... that Kulindroplax is the first known mollusk showing an unambiguous combination of exterior shells and a worm-like body?
 * ... that the extinct bivalve subfamily Praenuculinae can be told apart from its sister subfamily by looking at teeth?