Figure 12 in Species limits within the Praomys delectorum group (Rodentia: Muridae: Murinae) of East Africa: a morphometric reassessment and biogeographical implications

Figure 12. Morphometric comparisons of samples of Hylomyscus and Praomys that co-occur in montane forest across the Eastern Arc Mountains (South Pare Mts to Udzungwa Mts) into the Southern Highlands (Livingstone Mts and Mt Rungwe) of Tanzania. Top graphs: north–south transects of morphometric differentiation as indexed by the first canonical variate extracted; vertical lines correspond to the sample range and filled circles to the sample mean (Abbreviations: EUS, East Usambara Mts; LIV, Livingstone Mts; NGR, Nguru Mts; RUN, Mt Rungwe; SPA, South Pare Mts; UDZ, Udzungwa Mts; UKA, Ukaguru Mts; ULU, Uluguru Mts; WUS, West Usambara Mts). Bottom phenograms: Cluster diagrams (UPGMA) based on Mahalanobis squared distances between the nine OTU centroids as derived from discriminant function analysis; only nodes that were consistently recovered by bootstrapping are indicated (± 70%, 1000 iterations), leaving poorly defined levels of phenetic affinity as unresolved. Both multivariate perspectives document abrupt shifts in craniodental differentiation between populations of Praomys coincident with the Makambako Gap (here interpreted as different species, P. melanotus and P. taitae) but not those of Hylomyscus (interpreted as the single species H. arcimontensis by Carleton & Stanley, 2005). See text for discussion.