Paxton, Hannelore; Gillet, Patrick. (2004). Longibrachium falcigerum, a new species of Onuphidae (Annelida: Polychaeta) from the Seamount 2 Expedition, North Atlantic Ocean. Journal of the Marine Biological Association of the United Kingdom. 84(1):59-62.
A new species, Longibrachium falcigerum, is described from seamounts in the North Atlantic Ocean, from depths of 495–695 m. Longibrachium falcigerum sp. nov. is unique among its congeners for possessing falcigers and spinigers in the lower chaetal bundle. Another member of the Rhamphobrachium complex, Rhamphobrachium (Spinigerium) brevibrachiatum, occurring with the new species, is briefly characterized.
