First record of Halictoxenos Pierce (Strepsiptera: Stylopidae) from Mexico with the description of a new species parasite of Lasioglossum exiguum (Smith) (Hymenoptera: Halictidae).

Halictoxenos is a genus of parasites with a mainly holarctic distribution and exclusive parasite of bees of the Halictinae subfamily. In this work, we describe a new species from Mexico, parasite of the halictid Lasioglossum exiguum and with a known distribution in locations of central and southern Veracruz. The delimitation of this species is supported by morphological and molecular evidence.

Alpha and beta phylogenetic diversities jointly reveal ant community assembly mechanisms along a tropical elevational gradient.

Despite the long-standing interest in the organization of ant communities across elevational gradients, few studies have incorporated the evolutionary information to understand the historical processes that underlay such patterns. Through the evaluation of phylogenetic α and β-diversity, we analyzed the structure of leaf-litter ant communities along the Cofre de Perote mountain in Mexico and evaluated whether deterministic- (i.e.

Lumbar degenerative spondylolisthesis II: treatment and controversies.

There are various approaches and surgical techniques with the objective of nerve root decompression, restrict mobility, and fusion of the listhesis. Among the techniques, posterior interbody fusion combines direct and indirect root decompression with the fusion between vertebral bodies, placing an autologous bone graft between transverse apophysis and vertebral bodies. Transforaminal lumbar and posterior interbody fusion, on the same way, look to decompress and fuse but with a different approach to the spine.

Degenerative spondylolisthesis I: general principles.

Lumbar degenerative spondylolisthesis is the result of the progression from degenerative changes in the intervertebral disc and facet joints that lead to destabilizing one or more vertebral segments. It is characterized by the anterior sliding of the vertebral body secondary to the sagittalization of the facet joints. Wiltse, Newman, and Macnab classified it as type III.

Impact of on Adults of the Parasitoid and Parasitized Larvae.

Biological control of the Mexican fruit fly, , is mainly carried out by releasing parasitoids, such as , and by applying entomopathogenic fungi (EPF), such as , , or , which can be applied to the soil or dispersed using infective devices. The combined use of two or more biocontrol agents could improve control, but IGP between natural enemies, if it occurs, may have negative effects. We evaluated the effects of EPF on .