The stick insect fauna of Laos has been poorly studied to date. Only 4 species are recorded from the country: Medauroidea brongniarti (Brunner von Wattenwyl, 1907), Phobaeticus magnus Hennemann & Conle, 2008, Parapachymorpha spiniger (Brunner von Wattenwyl, 1907), Sipyloidea sipylus (Westwood, 1859). Assessment of their actual species richness is impeded by various unfavorable circumstances. Their cryptic and immobile lifestyle does not allow for easy trapping and collecting. The aim of this study is to update the taxonomic status of the order Phasmatodea in Laos for the future study.

To elucidate the effect of cellular phone electromagnetic wave (EMW) exposure on the developing cerebellar cortex of neonatal Sprague-Dawley rats, animals were exposed to cellular phone electromagnetic waves for 1 hr per day for 3 weeks. At the end of the experimental period, animals were sacrificed by cardiac perfusion, after which histological samples were prepared and observed microscopically. In the EMW exposure group, external granule cells were remained partially in the external granular layer without migrating into the internal granular layer. In addition, dark stained shrunken Purkinje cells with pyknotic nuclei increased and the outline of cells became irregular and showed degenerative signs, such as mitochondrial swelling and disrupted cristae. Moreover, the cisternae of rough endoplasmic reticula and Golgi complex were severely swollen. Bergmann glial cells adjacent to the dark stained Purkinje cells were swollen and cytoplasmic organelles were scant. Dark stained shrunken granule cells were also observed and the outline of cells was irregular. The results of the present study suggest that cellular phone EMW exposure to neonatal Sprague-Dawley rats leads to a partial delay of early migration of cerebellar cortical cells and degenerative changes in Purkinje cells, Bergmann glial cells and granule cells.