Mayomyzon pieckoensis is an extinct species of lamprey that lived during the Late Carboniferous period, about 300 million years ago. It is the only known...

in ancient seas. The oral disk of the Late Carboniferous lamprey Mayomyzon pieckoensis, if present, is much smaller, while there is no evidence of a disk...

(2016). New information on the anatomy of the Carboniferous taxa Mayomyzon pieckoensis and Myxinikela siroka is published by Gabbott et al. (2016), who...