Abstract Horizontal migration in response to flooding is reported for Glossoscolecidae of a black-water inundation forest. During increasing water-level, Glossoscolecidae migrate towards the dry-land forest, 16-26m distance beyond the water margin. With decreasing water-level, they return to the inundation-forest, following the water margin at 5-10m distance. Distribution seems to be correlated with humidity and pH of the soil.
Summary More than 800 specimens of migrating symphylans (Myriapoda, Symphyla, Scutigerellidae) have been collected in an inundation forest at the rio Tarumã-Mirim near Manaus in Brazil. They belong to a new species, Hanseniella arborea, which is described. The material is from the migration into the capony prior to the inundation. All the specimens were collected in arboreal photoecectors placed at the height of 3.60m. above the ground.
Abundance and phenology of Pseudoscorpiones (Arachnida) from a mixedwater inundation forest in Central Amazonia, Brazil