title: Description of Pseudingolfiella possessionis n. sp. (Crustacea, Amphipoda) from sub-Antarctic Île de La Possession, Crozet archipelago: the second freshwater amphipod known from the Antarctic biome, a human introduction of Gondwanan ancestry?
abstract: A new species of freshwater amphipod, Pseudingolfiella possessionis n. sp. (Senticaudata, Pseudingolfiellidae), is described from the submerged moss vegetation of small brooklets at sub-Antarctic Île de La Possession, Crozet archipelago. It constitutes the second freshwater amphipod species known for the sub-Antarctic and Antarctic region, and the fourth member of the genus. The main characters distinguishing it from all congeners are: the spine on the posterior margin of the dactylus, incisor and lamina mobilis of mandible each with 5 teeth, the setation of the maxilliped, the vestigial second article of pleopod 3 in the female, the undulate and laterally notched posterolateral margin of the external ramus of uropods 1 and 2 in the male, the spinulate dorsomedian projection of the telson.
authors.affiliation: Department of Biology, University of Antwerp Campus Drie Eiken, Universiteitsplein 1, B-2610 Wilrijk, Belgium.; Email: willem.desmet@uantwerpen.be.
authors.forename: Willem H De
authors.initials: WH
authors.lastname: Smet
mesh_terms: D033304:Amphipoda / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D000864:Antarctic Regions; D049628:Body Size; D017753:Ecosystem; D005260:Female; D006801:Humans; D008297:Male; D009929:Organ Size