Figure 2

Multi-locus molecular phylogeny of the African Viviparidae. The phylogeny comprises the genera Bellamya and Neothauma (abbreviated as ‘N.’). The phylogeny was dated using a fossil-calibrated uncorrelated lognormal clock model. Clade I consists of four colour-coded, geographically distinct subgroups from the Middle Congo, Lake Malawi, the Lake Victoria area and the Okavango area. Colours correspond to those in Figure 3. Clade II consists of a Northern group with specimens from lakes Mweru and Bangweulu (highlighted in blue) and from the Northern Kafue as well as a Southern group with specimens from the Upper Zambezi, the Chobe, and the Southern Kafue. Confidence intervals (95%) for age estimates of selected nodes are indicated by grey bars; Bayesian posterior probabilities are given for selected nodes; ‘Out.’ indicates the outgroup. Locality details are provided in Table 1.