// Workers AI · dad joke modeWhat did Procephalaspis say? Head above the rest.
| Procephalaspis Temporal range: Silurian | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Infraphylum: | Agnatha |
| Class: | †Osteostraci |
| Order: | †Thyestiida |
| Genus: | †Procephalaspis |
Procephalaspis is an extinct genus of jawless fish.
References
[edit]- Telling the Evolutionary Time: Molecular Clocks and the Fossil Record (Systematics Association Special Volume) by Philip C J Donoghue and M. Paul Smith (page 227)
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