- Source: Lanarkia
Lanarkia is a genus of extinct thelodont agnathan which existed in what is now Scotland and Canada during the upper Silurian period.
There are two species of Lanarkia, Lanarkia spinosa and Lanarkia horrida.
Description
Lanarkia were very small fish specifically 30-45 cm in length that would have been possible prey to eurypterids.