Summary: | The female of Atergopedia longicaudata sp. n. is described from dead cold-water coral fragments collected from the Porcupine Seabight (NE Atlantic). The new species is the fourth representative of the family Novocriniidae (Copepoda, Harpacticoida); it can be distinguished from its congeners by the elongate caudal rami and the ancestral armature on enp-3 of P1. Rediscovery of Atergopedia vetusta Martínez Arbizu & Moura, 1998, originally described from the Arctic Barents Sea, results in corrections to the species description. Archaeotisbe confluenta Kornev & Chertoprud, 2008 is transferred to the genus Atergopedia Martínez Arbizu & Moura, 1998, and Archaeotisbe Kornev & Chertoprud, 2008 is newly treated as a junior synonym of Atergopedia . Diagnoses (as ground patterns) for the two novocriniid genera ( Atergopedia and Novocrinia Huys & Iliffe, 1998) are provided, and autapomorphies are indicated.
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