Myrmecotypus mazaxoides sp. nov. - a new ground-dwelling, carpenter ant-resembling sac spider species from the Bolivian orocline, with indirect evidence for species-specific mimicry (Araneae, Corinnidae, Castianeirinae) Author Perger, Robert https://orcid.org/0000-0001-9930-9638 Coleccion Boliviana de Fauna, La Paz, Bolivia robertperger@hotmail.com Author Duperre, Nadine https://orcid.org/0000-0003-2195-878X Zoological Museum, Center of Natural History, Universitaet Hamburg, Martin-Luther-King-Platz 3, 20146, Hamburg, Germany text Zoosystematics and Evolution 2021 2021-05-13 97 1 273 280 http://dx.doi.org/10.3897/zse.97.64766 journal article http://dx.doi.org/10.3897/zse.97.64766 1860-0743-1-273 8EBC87BBBD964E6FB63660429325AF21 169E8237E76A5104901F212E0747F3EC Genus Myrmecotypus O. Pickard-Cambridge, 1894 Type species. Myrmecotypus fuliginosus O. Pickard-Cambridge, 1894 (by original designation) Diagnosis. Cephalic region wide (cephalic index range 64-89), carapace narrowed (carapace index ˂ 60), without thoracic groove but with slight depression instead; PER wider than AER and almost straight to moderately recurved, AME larger than ALE, PME-PME greater than PME-PLE, PLE situated close to lateral margin of cephalic area; abdomen only very slightly petiolated; tibia I ventral spines paired in 2-2, 3-2, 3-3 or 4-4 arrangement; trochanter IV notch usually absent, with only a tiny one, if present ( Perger and Rubio 2021b ). Figure 1. Ecoregion distribution of Myrmecotypus mazaxoides sp. nov., according to the regionalization by Navarro and Ferreira (2011) ; A. Bolivia; B. Sub-Andean area at the Bolivian orocline 1. Collection locality of M. mazaxoides sp. nov., Santa Cruz de la Colina, Santa Cruz department; map produced with QGIS (version 2.14.3, http://www.qgis.org/en/site).