Article · Wikipedia archive · Last revised Aug 10, 2026

Zenaspis

Zenaspis is an extinct 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 in length. It had a horseshoe shaped head that probably sheltered a small brain.

Last revised
Aug 10, 2026
Read time
≈ 1 min
Length
115 w
Citations
3
Source
Wikipedia ↗
Zenaspis
Temporal range:
Fossil of Zenaspis powriei
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: †Osteostraci
Order: †Zenaspidida
Family: †Zenaspididae
Genus: †Zenaspis
Lankester, 1869
Type species
Zenaspis salweyi
Species
  • Zenaspis pagei
  • Zenaspis podolica
  • Zenaspis powriei
  • Zenaspis salweyi
  • Zenaspis waynensis

Zenaspis is an extinct 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.123

Life reconstruction of Zenaspis pagei source ↗
References

References

  1. Palaeontographical Society. Palaeontographical Society. 1870.
  2. "Zenaspis: Lower Devonian Bony Fish Of Podolia, Ukraine | Science 2.0". www.science20.com. 2014-08-27. Retrieved 2026-02-17.
  3. https://www.paleocodex.com/species/102710