Alfredo Dugès’ type specimens of amphibians and reptiles revisited Author Flores-Villela, Oscar Author Ríos-Muñoz, César A. Author Magaña-Cota, Gloria E. Author Quezadas-Tapia, Néstor L. text Zootaxa 2016 4092 1 journal volume 10.11646/zootaxa.4092.1.2 3702b49c-3e24-49d1-b3c7-7e46adb3c93f 1175-5326 269210 BFAA8A37-46EE-4E8D-A86E-CA9B782E302A Bathysiredon dumerilii queretarensis Maldonado Koerdell, 1948 Maldonado Koerdell (1948b) reported two specimens that Smith & Necker (1943) described as Ambystoma larvae. These specimens were labeled from “San Juan del Río, Guanajuato”, according to Smith & Necker (1943). But Maldonado Koerdell (1948b) stated that they were from “San Juan del Río (Qro.)”, arguing that Smith & Necker (1943) put them in the state of Guanajuato rather than in Queretaro, where a city called San Juan del Río is well known. Although there is a small town named San Juan del Río in the state of Guanajuato, in the municipality of Pénjamo ( N 20.314029º , W 101.734933º , INEGI 2015) we do not believe that the specimens could have come from this locality, because there is no a lake there (only a dam, probably recently built) and the population of this town is only 38 (http://www.microrregiones.gob.mx/catloc/contenido.aspx?refnac=110230632). Maldonado Koerdell referred to these specimens as cotypes ( syntypes ) and described them; they are catalogued as HE 1184–1185 ( Fig. 9 D, 10A). Brandon (1992) questioned the validity of this taxon and provides ample discussion on the matter. We concur with Brandon (1992) that this taxon should be synonymized with A. dumerilii . However, the specimens shown in Figures 9 D, 10A do not coincide with Maldonado-Koerdell’s description; one of us (OFV, personal notes) checked the holotypes in 1985 and his recollection is that they looked like A. dumerilii . We do not believe that specimens HE 1184–1185 ( Fig. 9 D, 10A) correspond to the taxon in question. Our conclusion is that both syntypes are lost. Current valid name: Ambystoma dumerilii (Dugès, 1870) .