A revision of the genus Elimedon J.L. Barnard, 1962 (Crustacea, Amphipoda, Tryphosidae) with the addition of two new species from the Clarion-Clipperton Zone, Central Pacific Ocean

Two new species are described in the genus Elimedon within the family Tryphosidae from depths between 4026–4299 m in the Clarion-Clipperton Zone, Pacific Ocean. A revised diagnosis of Elimedon is provided clarifying the characters which distinguish the genus from the closely related Hippomedon and allied genera. Elimedon breviclunis sp. nov . is described from eight specimens collected between 4273–4299 m depth and is characterised by a strongly shortened uropod 3 inner ramus and a telson which is long and deeply cleft, with widely separated lobes. Elimedon zabka sp. nov . is described from a single specimen of unknown sex collected at 4026 m depth. This species is characterised by a strongly shortened uropod 3 inner ramus, and a shortened (length equal to width) truncate telson. Molecular barcode data are also provided for the two species. The new species are fully illustrated and a key to the four species of Elimedon is provided.