FIGURE 4. A in Petrocephalus leo, a new species of African electric fish (Osteoglossomorpha: Mormyridae) from the Oubangui River basin (Congo basin)

FIGURE 4. A) The 13 parsimony-informative positions from the cytochrome b sequences of seven specimens of Petrocephalus zakoni from three Congolese ecoregions: the Sangha Ecoregion (at the Odzala-Kokua National Park); the Cuvette Centrale Ecoregion (at Yangambi); and Sudanic Congo-Oubangui Ecoregion (at Ouaka and Oubangui Rivers) and two specimens of Petrocephalus leo sp. nov. from the Kotto River (Sudanic Congo-Oubangui region). The base at each cytochrome b position is indicated. B) The most parsimonious tree of Petrocephalus zakoni and Petrocephalus leo cytochrome b haplotypes with branch lengths proportional to the number of substitutions (scale = one change). Tree rooted at the midpoint. C) The most parsimonious tree of Petrocephalus zakoni and Petrocephalus leo S7 first introns; only nucleotide indels (and their positions) are mapped: triangles indicate deletions and inverted triangles indicate insertions; tree rooted with Petrocephalus bovei sequence from Genbank.