An Eocene orthocone from Antarctica shows convergent evolution of internally shelled cephalopods Doguzhaeva, Larisa A. ; Bengtson, Stefan ; Reguero, Marcelo A. ; Mörs, Thomas Abstract Publication: PLoS ONE Pub Date: March 2017 DOI: 10.1371/journal.pone.0172169 Bibcode: 2017PLoSO..1272169D