Jamoytius was originally named by Errol White on the basis of two specimens (the generic name is a reference to
J. A. Moy-Thomas) and, at the time, it was considered to be the most
basal vertebrate known. Since then, it has been reclassified by many workers as having many different affinities, such as an "unspecialized anaspid", it does not possess any usual
chordate synapomorphies. Currently,
J. kerwoodi is now placed in its own order
Jamoytiiformes, together with
Euphanerops and similar agnathans. == Palaeoecology ==