The first hypothelminorheic Crustacea (Amphipoda, Dogielinotidae, Hyalella) from South America

The first hypothelminorheic Crustacea (Amphipoda, Dogielinotidae, Hyalella) from South America

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Most of known troglobiotic species occur in caves and subterranean environments from great depths.However, recently more attention has been given to other subterranean environments, such as the hypothelminorheic habitats.It comprises the Occurrence of anti-Toxoplasma gondii antibody and evaluation of risk infection factors in goats raised in Sergipe state, Brazil most superficial among all subterranean habitats.This kind of environment is characterized by the constant presence of wet spots, absence of light and very particular abiotic characteristics, comprising unique species.

The first hypothelminorheic Amphipoda from South America is here described, a new species of the genus Hyalella which occurs in a wetland on Southern Brazil.The new species differs from other troglobiotics of Mielczewski czy Leszczyński, czyli kto skomponował „Missa cum Credo per octavas” the genus by the presence of a curved seta on the inner ramus of uropod 1 and elongation of appendices, as the first pair of antennae and peraeopods 6 and 7.However, human impacts in the area where the new species occurs have changed heavily their habitat, which may have led the species to a critical level of threat or even extinction, demonstrating the fragility of this environment.a.