Breast cancer research has yielded several important results including the strong susceptibility genes,BRCA1 and BRCA2 and more recently 19 genes and genetic loci that confer a more moderate risk.The pace of discovery is accelerating as genetic technology and computational methods…

A new species of the Dahlibruchus genus is described and information is given about its bionomics and host plants, also are mentioned general aspects about the archeological site where the insect was found.

New combinations are proposed here for 26 species and one variety belonging to 13 genera of Mexican Orchidaceae.These combinations are required to comply with current taxonomic concepts and ongoing revisionary treatment of the orchids of mexico. The collector and number…

An isolated supraorbital horncore collected from the Olmos Formation near Múzquiz is among the longest ever found, and records the presence in this area of a very large ceratopsid. The specimen probably pertains to a chasmosaurine, but differs significantly from…

Here we report on the first mandible fragment of the giant alligatoroid eusuchian crocodyliform Deinosuchus found in Mexico. The specimen comes from Las Jicoteas locality, northwestern Coahuila. It was collected in 2007 by the first author. The fragment is from…

During fieldwork in San Juan Teponaxtla, Oaxaca, 3 individuals of Aristolochia tricaudata Lemaire, a very rare species threatened with extinction, were observed with flowers and fruits. Although this species is present in many botanical gardens, fruits have never been observed.…

In this work, we report the published cases of human and porcine cysticercosis, as well as Taenia solium taeniasis diagnosed in Mexico during the last 10 years. Numerical data allow us to state that this disease remains as a public…

Based on a systematic study of the Mexican species in the Tillandsia viridiflora complex, the taxonomic and nomenclatural status of these species is clarified. The former synonym T. macropetala is reestablished as a species. An identification key for the complex…

Based on recent systematic studies of the genus Otatea, that included an extensive taxonomic investigation of herbaria specimens, and recent fieldwork in the Mexican state of Querétaro, a new Otatea species, O. ramirezii, is here described and illustrated. The new…

This paper presents an economic classification for the municipalities of Guerrero, Mexico, in terms of successive quotients. An outline of the concepts underlying this branch of Economic Geography is followed by a description of the method used to determine the…