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.…

On February 10th, 2010, the inhabitant population of some towns near the border between the States of Hidalgo and Puebla, Mexico, heard a strong blast overhead and felt seismic tremors and roof and windows vibration. At Tulancingo, Hidalgo, 25 km…

Two orchid species, both previously known from Central America, are reported for the Mexican flora: Oncidium poikilostalix and Telipogon helleri. The former species was previsouly known under the name Sigmatostalix poikilostalix, and the latter as Stellilabium helleri. The rediscovery of…

The volatile composition of the leaves of Bursera velutina Bullock (Burseraceae) was determined by a gas chromatograph-mass spectrometer (GC-MS). the major component found was 2-phenylethanol (29.5%). This is the first report of 2-phenylethanol in the leaves of a species of…

Lophiaris tapiae Balam & Carnevali (Orchidaceae: Oncidiinae) is described and illustrated. The new species is known only from the Escarcega area, and the Candelaria and Palizada rivers margins in the state of Campeche, Mexico. It is compared with species of…