Figure 1 in A review on deep molluscan phylogeny: old markers, integrative approaches, persistent problems

Figure 1. Major competing hypotheses on molluscan phylogeny and evolution. Left: Consensus tree from phylogenomics according to Telford and Budd (2011) and Kocot (2013), showing a basal split into Aculifera and Conchifera, and Monoplacophora sister to Cephalopoda; suggesting that worm-like body constructions of aplacophorans are secondary simplifications of a more complex ancestor (Scheltema 1993). Right: Morphocladistic tree from Haszprunar (2000), showing basal paraphyletic aplacophorans, monophyletic Testaria and Conchifera with basal Monoplacophora, implying progressive evolution from worm-molluscs to shell plate-bearing chitons and towards molluscs with true shell (Salvini-Plawen 2006). The taxon Serialia (Giribet et al. 2006) is incompatible with traditional Testaria, Aculifera and Conchifera concepts.Published as part of Schrödl, Michael & Stöger, Isabella, 2014, A review on deep molluscan phylogeny: old markers, integrative approaches, persistent problems, pp. 2773-2804 in Journal of Natural History 48 (45-48) on page 2774, DOI: 10.1080/00222933.2014.963184, http://zenodo.org/record/519459