A new flea species, Hystrichopsylla cryptotis, is described freom the Sierra Madre Oriental and Sierra Madre del Sur, Mexico. The host of this new species is the shrew Cryptotis mexicana ( Coues, 1877) ( Mammalia: Soricidae). ...

(2) the Balsas Basin of Morelos, Puebla, Distrito Federal, and the State of Mexico

We describe a new species of Xenosaurus freom the Sierra Madre del Sur in Oxaca and compare it to all the other species in the genus. The new species differs freom the others by having 26 white spots on the infrealabiallabiomental ...

The spatial evolution of South American Syncarida (Anaspidacea and Bathynellacea) and related taxa is evaluated applying a panbiogeographic approach, where Ocean basins are used to identify major patterns of intercontinental ...

The designation of a neotype for Conopsis nasus is necessary because the type specimen is apparently lost, the original description is ambiguous and can be applied to more than one valid taxon, and there are inconsistencies ...

The karyotypic status of the mesquite lizard, Sceloporus grammicus, was investigated at two localities at Santuario Mapethe, Hidalgo, Mexico. A total of 23 different karyotypes was recorded freom the 36 individuals examined. ...

Direct studies of mammalian carnivores are challenging due to the animals' secretive nature and the high costs associated with their capture and handling. Use of noninvasive hair sampling to survey these reclusive species ...

S. mexicanus Couti re, 1909, S. brevispinis Couti re, 1909 and S. peruvianus Rathbun, 1910. We agree with Dardeau, 1986, that S. scaphoceris Couti re, 1910, is a distinct species. Specimens identified as S. townsendi ...