Figure 20 in More than a gut feeling: utility of midgut anatomy in phylogeny of the Cerithioidea (Mollusca: Caenogastropoda)

Figure 20. Utility of midgut characters. A, no midgut analysis (NMA). Strict consensus of 272 equally parsimonious trees, tree length, L = 647 steps, consistency index, CI = 0.29, retention index, RI = 0.62, based on 123 morphological characters, excluding features of the midgut. B, midgut analysis (MA). Strict consensus of 6241 equally parsimonious trees, L = 94 steps, CI = 0.50, RI = 0.86, based on 28 midgut characters alone. Gray arrows indicate nodes shared with pooled morphology topology (Fig. 18).