Fig. 2From: The gladiuses in coleoid cephalopods: homology, parallelism, or convergence?Phylogeny of Coleoidea without (a) and with (b) fossil representatives. Indicated are only apomorphies and plesiomorphies related to the evolution of a gladius. The topology in b is based on Kröger et al. (2011) and Fuchs et al. (2013, in press). Stratigraphic occurrences or divergence times have been discardedBack to article page