Figure 2


Phylogenetic analysis of all 41 anomalous sequences obtained from 13 species of Ctenomys together with one representative mt sequence from each of those species. Note that the same sequence was sometimes found in two individuals (such that there were 30 distinct anomalous sequences). In construction of these trees indels were ignored and all nucleotide changes were weighted equally. The sequence for the South American porcupine Coendou bicolor (Lara et al., 1996) was used as an outgroup. Bootstrap values (%) are indicated over branches. (a) Strict consensus of the 170 equally parsimonious trees (395 steps long, consistency index = 0.678). (b) Neighbour-joining tree. Note that in both trees all the mt sequences group into a single well-defined lineage, likewise the A, B, C and D sequences each form clear, separate lineages.