@article{Blaimer_Fisher_2013, title={Taxonomy of the Crematogaster degeeri-species-assemblage in the Malagasy region (Hymenoptera: Formicidae)}, url={https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/172}, DOI={10.5852/ejt.2013.51}, abstractNote={We revise the species-level taxonomy of the <em>Crematogaster</em> (<em>Crematogaster</em>) <em>degeeri</em>-species-assemblage, a group of related ants occuring in Madagascar and the wider Malagasy region, and further provide an identification key to all species-groups of the genus <em>Crematogaster</em> in this region. Within the <em>C. degeeri</em>-assemblage, we recognize twelve species based upon morphological data from worker, queen and male ants, as well as genetic data from the barcode region of cytochrome oxidase I. Seven new species are described: <em>Crematogaster alafara</em> Blaimer sp. nov., <em>C. bara</em> Blaimer sp. nov., <em>C. mafybe </em>Blaimer sp. nov., <em>C. maina</em> Blaimer sp. nov., <em>C. malahelo</em> Blaimer sp. nov., <em>C. masokely</em> Blaimer sp. nov., <em>C. ramamy</em> Blaimer sp. nov. <em>Crematogaster tricolor</em> Gerstäcker, 1859 (stat. rev.) and <em>C. dentata</em> Dalla Torre, 1893 (stat. nov.) are raised to species level, and the following new synonymies are proposed:<em> Crematogaster degeeri lunaris</em> Santschi, 1928 as a synonym of <em>C. degeeri</em> Forel, 1886; <em>Crematogaster sewelli improba</em> Forel, 1907 and <em>C. sewelli mauritiana</em> Forel, 1907 as synonyms of <em>C. dentata</em> Dalla Torre, 1893, and<em> C. pacifica</em> Santschi, 1919 as a synonym of <em>C. lobata</em> Emery, 1895. Species descriptions, images, and distribution maps and identification keys based on worker ants, as well as on queen ants where available, are presented for all twelve species. In addition, we present a molecular gene tree for cytochrome oxidase I and summarize levels of sequence divergence within and between species of the <em>C. degeeri</em>-species-assemblage. Our findings are discussed in the light of previous work on Malagasy <em>Crematogaster</em> ants.}, number={51}, journal={European Journal of Taxonomy}, author={Blaimer, Bonnie B. and Fisher, Brian L.}, year={2013}, month={Aug.} }