Two species of Parapharyngodon collected from Bipes canaliculatus and Bipes tridactylus are herein described. Parapharyngodon lamothei n. sp. was collected from the 4-toed worm lizard Bipes canaliculatus from southern Mexico. It is unique in possessing 6 lips, a gubernaculum, a…

Objective. To identify serotypes and susceptibility of S. pneumoniae strains from 48 children with invasive infections and 50 carriers. Material and Methods. Typing was performed by the Quellung reaction and susceptibility by Kirby-Bauer and Etest according to CLSI standards. Results.…

Bed-by-bed sampling of ammonites from clayey to calcareous siltstones of the basal part of the Santiago Formation at the type section in Tamán, San Luis Potosi (Mexico) is first reported. Ammonites belonging to assemblages described by Burckhardt (1912), usually interpreted…

A new haploporid trematode, Saccocoelioides lamothei n. sp., is described from the intestine of the Pacific fat sleeper, Dormitator latifrons (Richardson, 1844) from 2 coastal lagoons of Guerrero, Mexico. The new species is characterized by the presence of diffuse eye-spot…

The generic diagnosis of Aristocleidus Mueller, 1936 is emended based on a collection of 2 species of the genus from the gills of the Peruvian mojarra, Diapterus peruvianus (Gerreidae), from a lagoon along the Pacific Coast of Mexico. The genus…

Euzetia lamothei n. sp. (Monogenea: Euzetiinae) is described from the gills of the stingray, Rhinoptera bonasus, collected from marine waters near Ciudad del Carmen, Campeche, Mexico. The species is assigned to Euzetia Chisholm and Whittington, 2001 because it has a…

A new species of Angiostoma (Angiostomatidae) is described from the intestine of the plethodontid salamander, Pseudoeurycea mixteca from Puebla State, in central Mexico. The new species closely resembles Angiostoma limancis, Angiostoma kimmeriensis, Angiostoma spiridonovi, Angiostoma stammeri, and Angiostoma carettae, because…

A new species of Spauligodon collected from the digestive tract of Sceloporus minor and Sceloporus grammicus is described. The species is assigned to Spauligodon because the caudal alae start at the level of the precloacal papillae and embed the adcloacal…

The Cerro Mercado pluton, emplaced in the Coahuila fold belt, contains magmatic, ductile, and brittle fabrics that suggest local and regional deformation during igneous emplacement, later affected by regional deformation in the area. The Cerro Mercado pluton intruded, deformed and…

The coastal Sonora batholith comprises a series of Cretaceous granitoids that intruded a metasedimentary basement of possible Mesozoic age. They are partially covered by Tertiary volcanic flows and pyroclastic rocks. In order to elucidate the crystallization and cooling history of…