Pyroclastic dikes emplaced along regional NW-SE faults in the Tertiary San Luis Potosí Volcanic Field consist of vitric pumice shards, rhyolite lithics, and broken crystals of quartz, sanidine, and biotite. These clasts display a parallel orientation inside the dikes and…

Semiscolex lamothei sp. nov. from Catemaco lake, Veracruz, México, is described based on the examination of 18 specimens. The new species differs from other species of the genus by the presence of 1/2 + 5 + 1/2 annuli between gonopores.…

Ethnoarchaeological research at the site of Cuentepec, Mexico includes experimental pottery dating in which social knowledge is obtained from archaeometric techniques. At Cuentepec, open kilns are used for firing pottery. Samples from volcanic rocks in the kilns were taken to…

The mycobiota present in natural habitats of Histoplasma capsulatum was determined in samples of bat guano, poultry droppings, and intestinal contents of bats. The following fungi were isolated: 1) from bat guano: the ascomycetes Aphanoascus fulvescens, Gymnascella citrina, Gymnoascus dankaliensis,…

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…

Here is described the first dinosaur evidence from Chiapas, and also the southernmost evidence of dinosaurs in Mexico. A small theropod tooth, identified as Richardoestesia isosceles, based on its shape and the presence of small denticles on the mesial and…

The relationship between poverty and natural resources is complex and the empirical evidence to date, mostly from estudies of forest activities and poverty, is inconclusive. The main purpose of this paper is to identify empirically the effects of household characteristics…

This paper examines the sources of inequality in the Mexican common property communities (ejidos), both in the past and in the present. It uses as a proxy of historical inequality the distribution of land at the time of the Agrarian…

Nodosaurid ankylosaur remains from the Upper Cretaceous of Mexico are summarized. The specimens are from the El Gallo Formation of Baja California, the Pen and Aguja Formations of northwestern Coahuila, and the Cerro del Pueblo Formation of southeast Coahuila, Mexico.…

Hexobelomeryx fricki is recorded in the San Miguel de Allende graben since the late early Hemphillian to the Blancan III, from about 7.0 millionyears to 3.0 millionyears. The studiedspecimens were recovered from floodplain andpoint bar deposits of the informal Rancho…