Priscomyzon
| Priscomyzon Temporal range: Famennian | |
|---|---|
| holotype | |
| Line drawing reconstruction | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Order: | |
| Genus: | †Priscomyzon Gess et al., 2006 |
| Type species | |
| †Priscomyzon riniensis Gess et al., 2006 | |
Priscomyzon riniensis is an extinct lamprey that lived some 360 million years ago during the Famennian (Late Devonian) in a marine or estuarine environment in South Africa. This small agnathan is anatomically similar to the Mazon Creek lampreys, but is some 35 million years older. Its key developments included the first known large oral disc, circumoral teeth and a branchial basket.