Charaxes tectonis, the mountain silver-barred charaxes, is a butterfly in the family Nymphalidae. It is found in Nigeria and Cameroon. The habitat consists of sub-montane and montane forests.
Historical attempts to assemble a cluster of presumably related species into a "Charaxes jasius Group" have not been wholly convincing. More recent taxonomic revision, corroborated by phylogenetic research, allow a more rational grouping congruent with cladistic relationships. Within a well-populated clade of 27 related species sharing a common ancestor approximately 16 mya during the Miocene, 26 are now considered together as The jasius Group. One of the two lineages within this clade forms a robust monophyletic group of seven species sharing a common ancestor approximately 2-3 mya, i.e. during the Pliocene, and are considered as the jasius subgroup. The second lineage leads to 19 other species within the Jasius group, which are split into three well-populated subgroups of closely related species.
The jasius Group (26 Species):
Clade 1: jasius subgroup (7 species)
Clade 2: contains the well-populated three additional subgroups (19 species) of the jasius Group: called the brutus, pollux, and eudoxus subgroups.
Further exploration of the phylogenetic relationships amongst existing Charaxes taxa is required to improve clarity.