User:Abyssal/Portal:Devonian/DYK/3
Appearance
![Restoration of the Devonian thelodont Furcacauda.](http://upload.wikimedia.org/wikipedia/commons/thumb/4/44/Furcacauda_heintzae.jpg/100px-Furcacauda_heintzae.jpg)
- ...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?