New insights into hindbrain evolution
Murakami Y, Pasqualetti M, Takio Y, Hirano S, Rijli F M and Kuratani S.
Segmental development of reticulospinal and branchiomotor neurons in lamprey: insights into the evolution of the vertebrate hindbrain.
Development 131:983-95 (2004)
 
 
So, why does the lamprey have no jaw?
Takio Y, Pasqualetti M, Kuraku S, Hirano S, Rijli F M and Kuratani S.
Evolutionary biology: lamprey Hox genes and the evolution of jaws.
Nature 429:1 p following 262 (2004)