User:Abyssal/Portal:Devonian/DYK/3


 * ...that fossil Thelodont fish (depiction pictured) surprised scientists by showing that stomachs evolved before jaws?
 * ... that the extinct bivalve subfamily Praenuculinae can be told apart from its sister subfamily by looking at teeth?
 * ... that Arthropleuridea is an extinct class of myriapods which includes, at over 2 meters long, the largest terrestrial arthropods that ever lived?
 * ...that ostracoderms are the earliest known vertebrate animals?