Recently, a new entomopathogenic nematode species Heterorhabditis sonorensis has been reported from Mexico. This nematode was recovered from nymphal stages of cicada Diceroprocta ornea collected from an asparagus field. Please read following research paper on techniques used for the identification of this new entomopathogenic nematode species.
Stock, S.P., Rivera-Orduno, B. and Flores-Lara, Y. 2009. Heterorhabditis sonorensis n. sp (Nematoda: Heterorhabditidae), a natural pathogen of the seasonal cicada Diceroprocta ornea (Walker) (Homoptera: Cicadidae) in the Sonoran desert. Journal of Invertebrate Pathology. 100: 175-184.