Abstract
Until now, the genusPseudorchomeneSchellenberg, 1926 has been recorded exclusively in Antarctic or sub-Antarctic regions.Pseudorchomeneboreoplebssp. n., described from Korean waters, is the first record from the Northern Hemisphere as well as from temperate regions. This new species is very similar toPseudorchomeneplebs(Hurley, 1965), but can be readily distinguished by its wider basis of gnathopod 1, elongate carpus and angulate anterodistal corner of the propodus on gnathopod 2, having slender setae only on the posterior margin of the carpus on pereopod 5, and lacking posterior lobations of the carpus on pereopods 5–7.
Highlights
Members of the genus Pseudorchomene Schellenberg, 1926 were considered to belong to the complicated ‘Orchomene complex’ (De Broyer 1984, Barnard and Karaman 1991, Havermans et al 2010), but the genus Pseudorchomene seems to be well defined as a monophyletic clade by the homogeneity between molecular sequence data of partial COI as well as morphological characters including a triangular or adz-shaped coxa 1 (d’Udekem d’Acoz and Havermans 2012)
Pseudorchomene boreoplebs sp. n., described from Korean waters, is the first record from the Northern Hemisphere as well as from temperate regions. This new species is very similar to Pseudorchomene plebs (Hurley, 1965), but can be readily distinguished by its wider basis of gnathopod 1, elongate carpus and angulate anterodistal corner of the propodus on gnathopod 2, having slender setae only on the posterior margin of the carpus on pereopod 5, and lacking posterior lobations of the carpus on pereopods 5–7
Members of the genus Pseudorchomene Schellenberg, 1926 were considered to belong to the complicated ‘Orchomene complex’ (De Broyer 1984, Barnard and Karaman 1991, Havermans et al 2010), but the genus Pseudorchomene seems to be well defined as a monophyletic clade by the homogeneity between molecular sequence data of partial COI as well as morphological characters including a triangular or adz-shaped coxa 1 (d’Udekem d’Acoz and Havermans 2012)
Summary
Members of the genus Pseudorchomene Schellenberg, 1926 were considered to belong to the complicated ‘Orchomene complex’ (De Broyer 1984, Barnard and Karaman 1991, Havermans et al 2010), but the genus Pseudorchomene seems to be well defined as a monophyletic clade by the homogeneity between molecular sequence data of partial COI as well as morphological characters including a triangular or adz-shaped coxa 1 (d’Udekem d’Acoz and Havermans 2012).
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