Revision of the Malagasy Camponotus subgenus Myrmosaga (Hymenoptera, Formicidae) using qualitative and quantitative morphology.

The CamponotussubgenusMyrmosaga from the Malagasy region is revised based on analysis of both qualitative morphological characters and morphometric traits. The multivariate analysis used the Nest Centroid (NC)-clustering method to generate species hypotheses based on 19 continuous morphological traits of minor workers. The proposed species hypotheses were confirmed by cumulative Linear Discriminant Analysis (LDA). Morphometric ratios for the subsets of minor and major workers were used in species descriptions and redefinitions. The present study places the subgenus Myrmopytia in synonymy to . It recognizes 38 species, of which 19 are newly described: , , , , , , , , , , , , , , , , , , Eleven species are redescribed: Roger, Roger, Forel, Forel, Forel, Forel, Forel, Forel, Forel, Forel, Santschi. The following are raised to species and redescribed: Santschi , Forel , Özdikmen , Forel , Forel Camponotusmaculatusst.fairmairei Santschi , is synonymized under . The following are synonymized under : Santschi, ; Forel, ; Forel, ; Donisthorpe, Forel, is a synonym of , Camponotushovavar.obscuratus Emery, is a synonym of , Emery, is a synonym of , Camponotusmaculatusst.legionarium Santschi, is a synonym of , Emery, is a synonym of . The following are synonymized under : Forel, , Camponotuskellerivar.invalidus Forel, , Emery, As Forel, Rakotonirina & Fisher, and Forel have been recently described and redescribed, only diagnoses and taxonomic discussions are provided. This revision also includes an illustrated species identification key, taxonomic discussions, images, and distribution maps for each species superimposed on the ecoregions of Madagascar.