The interrelationships of 'complex' conodonts (Vertebrata) Donoghue, Philip C. J. ; Purnell, Mark A. ; Aldridge, Richard J. ; Zhang, Shunxin Abstract Publication: Journal of Systematic Palaeontology Pub Date: January 2008 DOI: 10.1017/S1477201907002234 Bibcode: 2008JSPal...6..119D