Australia’s largest longhorn beetle genus, Rhytiphora, has received little scientific attention despite the charismatic appearance and broad geographic range. We use mitochondrial genome data to infer the phylogeny of the genus, revealing that Rhytiphora contains two distinct clades that correspond to body size and other morphological traits. Both clades have experienced multiple biome shifts within Australia, though most species diversity is found in the eastern mesic zone. This study provides an unprecedented insight into the evolutionary history of this diverse genus.

Only one species of the Chilean land planarian genus Gusana (Geoplanidae) is relatively well known under the current taxonomic standards. Four new species from the genus are described by combining morphological and molecular (DNA) information. Additionally, a recently introduced independent test based on pairwise genetic distances is applied. Morphological and molecular results are congruent with each other and support the recognition of the four new species.

Many tropical insect species remain formally undescribed and the validity of some rarely collected genera is uncertain. We revise the rare monotypic ant genus Overbeckia endemic to tropical SE Asia and Australasia, using both morphological and molecular data. We redescribe the genus and the only previously known species, O. subclavata and provide descriptions of two new species. In addition, we present a new molecular phylogeny of the tribe Camponotini that includes all eight extant genera and supports the genus Overbeckia as a monophyletic lineage sister to the genera Calomyrmex and Echinopla.