| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Palaeohydatina
Taxonomy
Palaeohydatina was named by Cossmann (1895) [Sepkoski's age data: J Sine K Sn]. It is not extant.
It was assigned to Cephalaspida by Sepkoski (2002).
It was assigned to Cephalaspida by Sepkoski (2002).