The aim of this paper is to determine the chronology of the information on papilionid and pierid butterflies of Mexico, as well as the patterns of collection and who were the most active collectors freom a curatorial databases and bibliography.…

Knowledge about fresh water bodies biology in the State of Tlaxcala, Mexico, has become of relevant importance in order to diagnosticate possibilities about natural aquatic renewable resources management for an optimum exploitation. For first ocassion, Apizaquito Reservoir in the State,…

Caballerolecythus ibunami n. gen., n. sp. is described from the intestine of 2 species of rodents (Liomys irroratus [Gray, 1868] and Peromyscus difficilis [Allen, 1891]) from Piñonal, El Carmen Tequexquitla, Tlaxcala state, Mexico. These specimens represent a new genus and…

Surfaces of buildings at the archaeological site of Palenque, Mexico, are colonized by cyanobacteria that form biofilms, which in turn cause aesthetic and structural damage. The structural characterization and species composition of biofilms from the walls of one of these…

Although some excellent Artículo de investigacións about Lyell's work have been published, they do not explicitly deal with Lyell's biogeographical conceptions. The purpose of this paper is to analyse Lyell's biogeographical model in terms of its own internal structure. Lyell…

In Mexico, the Knowledge of theprotozoa related lo mollusks, begin with the report of trhee forms associated to the oyster Crassotera corteziensis Hertlein, collected in the pacific coast in San BIas, Nayarit. From the Gulf the México, was protozoologically analysed…

The purpose of this research is to contribute to knowledge of taxonomy, ecological and local importance of freshwater mollusks inhabiting the Atlangatepec Reservoir, Tlaxcala. Four gastropoda pulmonata families were registered end represented by Physella sp [Physidae]; Planorbella trivolvis Say and…

The coreoid fauna from Neotropics is poorly known, especially in terms of community studies. Aiming at contributing to this knowledge, a two-year study was carried out at Parque Estadual do Turvo, Municipality of Derrubadas, state of Rio Grande do Sul,…

The hydrological characteristics of the Peninsula of Yucatan have given cause for the systems training limnological very particular, that include exposed and underground waters of origin carstic. The aquatic fauna of the cenotes and caves yucatecos has been studied from…

The Gulf 0f Mexico constitutes a natural resource of immense ecological and economic importance foe Mexico and the World (Vidal, el al., 1997). Our capacity to exploitit rationallydepends on our knowledge of its nature, fundamentally of its circulation system, amongst…