| Samenvatting: | This study is a revisión of the Mexican species of the subgenus Glaphyrocanthon (Scarabaeidae: Scarabaeinae: Canthon). While in the Américas as a whole the subgenus Canthon contains more species than Glaphyrocanthon, this study will establish the Glaphyrocanthon as the richest supraspecific taxa of the Mexican Canthonina (19 taxa compared to the Canthon subgenus' 12. The Mexican species of Glaphyrocanthon do not correspond to a single evolutionary line. In México there are four groups of species. Of these, two present their greatest diversification in South America and the Mexican species represent expansions northward of these South American lineages. Thus, the femoralis group is representad in México by a single species, and the subhyalinus group by three. Both are cases of forms associated with tropical foresta, monkey excrement, where this continúes to exist, and fiying patterns at considerable heights within the forest. Canthon (Glaphyrocanthon) moronimakes up the third lina, of which no proximate South American species exista. Finaily, the fourth group: viridis, is characterized by a veritable explosión of speciation (15 species) in the Mexican Transition Zone. It is a group that is exclusive and characteristic of this zone. The present papar ineludes an explanation of the morphological characters usad in the keys and descriptions, as well as, a key to the species and subspecies of the Mexican Glaphyrocanthon, and a second key to all of the species that make up the subhyalinus group (Spanish and English versions are offered of both keys). A tabla lists the distinct characteristics of all the Mexican subspecies of Glaphyrocanthon. AIso included is a diagnosis or description (in the case of new taxa) of the Mexican Glaphyrocanthon. A total of 20 taxa are studied, of which 10 are species that are new to science.
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