Zenaspis

Extinct genus of jawless fishes

Zenaspis Temporal range: Early Devonian PreꞒ Ꞓ O S D C P T J K Pg N

Fossil of Zenaspis powriei
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Osteostraci
Subclass:	Cornuata
Order:	Zenaspidida
Family:	Zenaspididae
Genus:	Zenaspis Lankester, 1869

Zenaspis is an extinct genus of jawless fish which existed during the early Devonian period. Due to it being jawless, Zenaspis was probably a bottom feeder. The fish was around 10 inches (25 cm) in length. It had a horseshoe shaped head that probably sheltered a small brain.

References

Osteostraci

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata

Osteostraci

Hemicyclaspis Ungulaspis
Ateleaspididae	Aceraspis Ateleaspis Hirella

Cornuata

Camptaspis
Cephalaspis
Hildenaspis
Janaspis
Mimetaspis
Pattenaspis
Waengsjoeaspis
Yvonaspis
Zychaspis

Benneviaspidida

Benneviaspis Ectinaspis Hoelaspis Securiaspis Severaspis
Boreaspididae	Belonaspis Boreaspis Hapilaspis Spatulaspis Tauraspis

Thyestiida

Aestiaspis Auchenaspis Dartmuthia Didymaspis Ilemoraspis Procephalaspis Saaremaspis Thyestes Tyriaspis Witaaspis
Kiaeraspididae	Acrotomaspis Axinaspis Gustavaspis Kiaeraspis Nectaspis Norselaspis
Tremataspididae	Dobraspis Oeselaspis Sclerodus Tannuaspis Timanaspis Tremataspis

Zenaspidida

Spangenhelmaspis Wladysagitta
Parameteoraspididae	Balticaspis Escuminaspis Levesquaspis Parameteoraspis Trewinia
Superciliaspididae	Dentapelta Glabrapelta Superciliaspis
Scolenaspididae	Machairaspis Scolenaspis Ukrainaspis
Zenaspididae	Diademaspis Stensiopelta Tegaspis Zenaspis