Background: Chagas disease is caused by the hemoflagellate parasite Trypanosoma cruzi, transmitted by more than 133 species of hematophagous triatomines of the family Reduviidae. There are 8 million infected people in the world and 25 million live in at-risk areas. More than 34 species of triatomine carriers have been reported in Mexico, and Meccus mazzotti is considered an endemic species of epidemiological importance. Methods: Since 2017, a continuous search for triatomines has been carried out in the community of Tlayacapan, Morelos, Mexico, with the objective of determining the species present in that community, for their taxonomic identification the keys of Lent and Wygodzinsky (1979) are used. Results: 106 specimens were captured, of these 105 were identified as M. pallidipennis and 1 as M. mazzotti. Conclusion: For the first time, we report the finding of M. mazzotti in the state of Morelos, a region in which M. pallidipennis and T. barberi have predominated, so it is necessary to continue the search for this new species in that state and to reinforce the control measures for these vectors. RESUMEN Antecedentes: la Enfermedad de Chagas es causada por el parásito hemoflagelado Trypanosoma cruzi, transmitido por más de 133 especies de triatominos hematófagos de la familia Reduviidae. Hay 8 millones de personas infectadas en el mundo y 25 millones viven en zonas de riesgo. En México se han reportado más de 34 especies de triatominos portadores, y Meccus mazzotti se considera una especie endémica de importancia epidemiológica. Métodos: Desde 2017 se realiza una búsqueda continua de triatominos en la comunidad de Tlayacapan, Morelos, México, con el objetivo de determinar las especies presentes en dicha comunidad, para su identificación taxonómica se utilizan las claves de Lent y Wygodzinsky (1979). Resultados: Se han capturado 106 ejemplares, de estos 105 fueron identificados como M. pallidipennis y 1 como M. mazzotti. Conclusión: Por primera vez se reporta el hallazgo de M. mazzotti en el estado de Morelos, región en la que han predominado M. pallidipennis y T. barberi, por lo que es necesario continuar con la búsqueda de esta nueva especie en dicho estado y reforzar las medidas de control de estos vectores., {"references":["Cobos-Valdes D, De Valle-Fernández TY, Labañino-Mulet N, Martínez-Martínez W, Peña-Rojas L, Santos-Cancino MC. General Features to Analyze on Zoonosis. CCH, Correo cient. Holguín. 2014; 18(4): 709-724. 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