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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

v t e 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
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