• Publications
  • Influence
South American native bumblebees (Hymenoptera: Apidae) infected by Nosema ceranae (Microsporidia), an emerging pathogen of honeybees (Apis mellifera).
The presence of Nosema ceranae, an emerging honeybee pathogen, in three species of Argentine native bumblebees is described for the first time and the appearance of this pathogen is discussed in the context of the population decline of this pollinators. Expand
The invasion of southern South America by imported bumblebees and associated parasites.
The ecological and genetic data suggest a major invasion event that is currently unfolding in southern South America with disastrous consequences for the native bumblebee species. Expand
Grasshopper (Orthoptera : Acridoidea) species diversity in the Pampas, Argentina
Results showed that, contrary to what was expected, one of the widely distributed species in the region (i.e. Baeacris punctulatus) does not always constituteone of the most abundant species. Expand
Unclassified Protists of Arthropods: The Ultrastructure of Nephridiophaga periplanetae (Lutz & Splendore, 1903) N. Comb., and the Affinities of the Nephridiophagidae to Other Protists
Observations by electron microscopy on Coelosporidium periplanetae found that the family Nephridiophagidae cannot be included into any of the currently recognized phyla of protists, so it is suggested that it should be temporarily treated as an incertae sedis group of Protista. Expand
Invasive Bombus terrestris (Hymenoptera: Apidae) parasitized by a flagellate (Euglenozoa: Kinetoplastea) and a neogregarine (Apicomplexa: Neogregarinorida).
The flagellate Crithidia bombi and the neogregarine Apicystis bombi have been found in individuals of Bombus terrestris, a Palaearctic species of bumble bee commercially reared and shipped worldwideExpand
The host and geographical range of the grasshopper pathogen Paranosema (Nosema) locustae revisited
Host and geographical ranges are updated for the microsporidium Paranosema locustae; this pathogen was developed in the USA as a long-term microbial control agent of grasshoppers and may have the ability to alter, through differences in host susceptibilities, the structure of Grasshopper assemblages in areas where it was not present before. Expand
A New Encephalitozoon Species (Microsporidia) Isolated from the Lubber Grasshopper, Romalea microptera (Beauvois) (Orthoptera: Romaleidae)
Abstract We describe a new microsporidian species, Encephalitozoon romaleae n. sp., isolated from an invertebrate host, the grasshopper Romalea microptera, collected near Weeks Island, Louisiana, andExpand
The tracheal mite Locustacarus buchneri in South American native bumble bees (Hymenoptera: Apidae).
As in other regions of the world, bumble bees (Bombus spp.) are important pollinators in the neotropics. Despite its relevance, knowledge on their health is still limited in the region. WhileExpand
Phylogenetic relationships in Dichroplus Stål (Orthoptera: Acrididae: Melanoplinae) inferred from molecular and morphological data: testing karyotype diversification
The mapping of chromosome characters on the combined tree shows that the most extreme karyotype, in D. silveiraguidoi, is a derived condition, probably reached through several centic fusions, and that X‐autosome centric fusions were recurrently fixed during the evolution of the group. Expand
Seasonal Occurrence of Life Stages of Grasshoppers (Orthoptera: Acridoidea) in the Southern Pampas, Argentina
The seasonal occurrence of life stages of grasshopper species of the Southern Pampas was studied through sampling of representative habitats for 5 seasons, with only 1 species (Sinipta dalmani) spent the winter as a nymph. Expand