Zoological material collected during the expeditions BIOPAPUA 2010, PAPUA NIUGINI 2012, MADEEP 2014, and KAVIENG 2014, in the waters of the Bismarck and Solomon Seas of Papua New Guinea (PNG) yielded 12 species of deep-sea shrimps of the family Palaemonidae. Besides one new species of the genus Amphipontonia described in this paper, six others, namely Bathymenes aleator, Echinopericlimenes calcaratus, Palaemonella dolichodactylus, P. spinulata, Periclimenes laccadivensis, and P. uniunguiculatus, are new records for Papua New Guinea. An extension to the known bathymetric range is reported here for the deep-water species Palaemonella dolichodactylus, P. komaii, P. spinulata, and Periclimenes uniunguiculatus, and also for two species previously considered as restricted to shallow water, i.e., Laomenes amboinensis and Ancylomenes sp., collected from depths over 90 and 180 m, respectively. Based on the present molecular analysis and additional GenBank sequences, three deep-water Periclimenes species, i.e., P. boucheti, P. leptunguis, and P. sandybrucei, are formally transferred here to the genus Bathymenes, and B. brevirostris is synonymized with B. aleator.

Zoological material collected during the expeditions BIOPAPUA 2010, PAPUA NIUGINI 2012, MADEEP 2014, and KAVIENG 2014, in the waters of the Bismarck and Solomon Seas of Papua New Guinea (PNG) yielded 12 species of deep-sea shrimps of the family Palaemonidae. Besides one new species of the genus Amphipontonia described in this paper, six others, namely Bathymenes aleator, Echinopericlimenes calcaratus, Palaemonella dolichodactylus, P. spinulata, Periclimenes laccadivensis, and P. uniunguiculatus, are new records for Papua New Guinea. An extension to the known bathymetric range is reported here for the deep-water species Palaemonella dolichodactylus, P. komaii, P. spinulata, and Periclimenes uniunguiculatus, and also for two species previously considered as restricted to shallow water, i.e., Laomenes amboinensis and Ancylomenes sp., collected from depths over 90 and 180 m, respectively. Based on the present molecular analysis and additional GenBank sequences, three deep-water Periclimenes species, i.e., P. boucheti, P. leptunguis, and P. sandybrucei, are formally transferred here to the genus Bathymenes, and B. brevirostris is synonymized with B. aleator.