A taxonomic revision of the Malagasy endemic subgenus Mayria of the genus Camponotus (Hymenoptera, Formicidae) based on qualitative morphology and quantitative morphometric analyses

The subgenus Mayria of the genus Camponotus (Hymenoptera: Formicidae) is revised. The subgenus is endemic to Madagascar where it occupies a broad range of habitats, from deciduous and dry forest to rainforest. A taxonomic review is provided of this subgenus, integrating multiples lines of evidence including qualitative morphology and quantitative morphometry. Species hypotheses are formed by Nest Centroid clustering. In total, 36 species are treated, of which eleven are newly described: Camponotusandrianjakasp. nov., Camponotusantsaraingysp. nov., Camponotuschrislainisp. nov., Camponotusclaverisp. nov., Camponotusivadiasp. nov., Camponotusjjacquiasp. nov., Camponotusmaintilanysp. nov., Camponotusnorvigisp. nov., Camponotusihazofotsysp. nov., Camponotustsimelahysp. nov., Camponotuszorosp. nov. Five species are redescribed. Camponotusthemistocles Forel stat. nov., is raised to species. In addition, the subgenus is redefined to include 39 species. Twenty-two previously described species are transferred to this subgenus and thirteen species previously placed in the subgenus are transferred out of the subgenus. Nine morphologically consistent species groups are delineated to facilitate species identification within the subgenus. This revision includes a classification, a key to species groups, and an updated key to species based on the minor worker caste.