Depiction of water depth inhabited by naraoiids through time. An increase in water depth from Ordovician to Silurian indicates habitation of deeper water conditions in younger species.

 
 
  Part of: Bicknell RDC, Goodman A, Laibl L, Amati L (2025) Novel evidence for the youngest Naraoia and a reassessment of naraoiid paleobiogeography. Fossil Record 28(1): 115-124. https://doi.org/10.3897/fr.28.e150343