Zenaspis Temporal range: 
       Fossil of Zenaspis powriei           Scientific classification              Kingdom:                 Phylum:                     Class:         Subclass:               Order:                       Family:                   Genus:   Zenaspis 
                                       Type species     Zenaspis salweyi 
          Species      Zenaspis pagei Zenaspis podolica Zenaspis powriei Zenaspis salweyi Zenaspis waynensis                    
 Zenaspis genus  of osteostracan  jawless fish which existed during the early Devonian  period. Due to it being jawless, Zenaspis  was probably a bottom feeder . Zenaspis  was around 10 inches (25 cm) in length. It had a horseshoe shaped head that probably sheltered a small brain . 
 Life reconstruction of Zenaspis pagei  
Benneviaspidida 
 Benneviaspis Ectinaspis Hoelaspis Securiaspis Severaspis  Boreaspididae  Belonaspis Boreaspis Hapilaspis Spatulaspis Tauraspis  
Thyestiida 
Kiaeraspididae  Acrotomaspis Axinaspis Gustavaspis Kiaeraspis Nectaspis Norselaspis  Tremataspididae  Dobraspis Oeselaspis Sclerodus Tannuaspis Timanaspis Tremataspis  
Zenaspidida 
Parameteoraspididae  Balticaspis Escuminaspis Levesquaspis Parameteoraspis Trewinia  Superciliaspididae Scolenaspididae  Machairaspis Scolenaspis Ukrainaspis  Zenaspididae  Diademaspis Stensiopelta Tegaspis  
  
Taxon identifiers
Zenaspis