Fig. 4

Species tree of African mastacembelid eels inferred from mitochondrial (cyt b) and two nuclear (S7 introns) markers (2702 bp), using coalescent-based species tree analysis with no data concatenation (STAR-BEAST). Nodes with Bayesian posterior probabilities >0.98 are indicated by circles at nodes. Letters correspond to node support values in Table 1 (nodes with posterior probabilities <0.6 collapsed). Names in blue italic indicate endemic non-cryptophthalmic LCR (Lower Congo River) species, names in blue bold italic indicate endemic cryptophthalmic LCR species, names in red italic indicate native, non-cryptophthalmic LCR species. Two Asian species (Mastacembelus armatus and Macrognathus zebrinus) are used as outgroups