Taxonomy of the hyper-diverse ant genus Tetramorium Mayr in the Malagasy region (Hymenoptera, Formicidae, Myrmicinae) – first record of the T. setigerum species group and additions to the Malagasy species groups with an updated illustrated identification key

Schematic line drawings of Tetramorium cavernicola sp. n. illustrating the used measurements. A Body in profile with measuring lines for EL, WL, PH, PTH, and PPH B Mesosoma in dorsal view with measuring line for PW C Petiole and postpetiole in dorsal view with measuring lines for PTL, PTW, PPL, PPW D head in full-face view with measuring lines for HL, HW, and SL E Dorsocaudal view of the propodeum with measuring line for PSL.