A lungworm of the genus Rhabdias (Nematoda: Rhabdiasidae) was recovered from Scinax staufferi (Anura: Hylidae) collected in Guadalupe Victoria Mapastepec, Chiapas, Mexico (15°28'28"N, 92°53'26"W, 102 m). Morphology of the nematode is briefly described and compared with other species of the…

The purpose of this article is to examine the institutionalization of a region of the United States of America: the Texas Lower Rio Grande Valley. It will use and build on theories of regional institutionalization, geography, and demography by Paasi,…

OBJECTIVE: To estimate the incidence of myocardial infarction (MI) in a low-income Mexican population. MATERIAL AND METHODS: A total of 1 696 men and women aged 35 to 64 years from a longitudinal study were included. All subjects were free…

Lower Cretaceous shallow-water benthic foraminifera were recovered from the lower part of a limestone sequence that crops out in the Chilacachapa range in the Guerrero-Morelos Platform paleogeographic unit in southern Mexico. The benthic foraminiferal association consists of Palorbitolina lenticularis, Choffatella…

This article proves the presence of the bivalve of the genus Trichites in the Upper Jurassic of Santiago Coatepec, a small area located at the southeast of the state of Puebla, Mexico, and describes a new species, Trichites pueblaensis. This…

Petrographic and geochemical studies of the serpentinites from the Tehuitzingo body, the main ophiolitic outcrop of the Paleozoic Acatlán Complex of southern Mexico, provide new petrogenetic evidence and preliminary data on the nature of the fuids that interacted with an…

Petrographic, major, trace, and rare-earth element geochemistry of sands from three beaches of México (Cazones, Acapulco, and Bahía Kino) were studied to determine their provenance. The textural study reveals that the proportion of quartz is higher in Bahía Kino (~48-83…

The experience with echocardiographic diagnosis of five cases of Anomalous Origin of the Left Coronary Artery from the Pulmonary Artery (ALCAPA) is reviewed. Material and Methods. all cases with a diagnosis of ALCAPA during a 10 year period were included.…

This essay presents an analysis of the concept of Mesa Central of México as a potential biogeographical province. This region of México has been used as a reference for describing species richness and distribution patterns of the freshwater fish fauna.…

Colimaite, K3VS4, has been discovered in the active fumaroles of the Colima volcano crater, Mexico. The mineral is named colimaite after the locality, which, at the same time, is the current active volcanic crater and the name of the State…