There was an article about fossil jawless fish published recently in Nature.
Fossil jawless fish from China foreshadows early jawed vertebrate anatomy.
Gai Z, Donoghue PC, Zhu M, Janvier P, Stampanoni M.
Nature. 2011 Aug 17;476(7360):324-7. doi: 10.1038/nature10276.
I remember I listened to a talk by the first author at a meeting held in Kobe, Japan.
