• Animal Systematics, Evolution and Diversity
• /
• v.35 no.4
• /
• pp.161-167
• /
• 2019

Two new records of spionid polychaetes, Malacoceros reductus Blake & Kudenov, 1978 and Pseudopolydora cf. kempi (Southern, 1921), collected from Korean waters are reported here with detailed descriptions and illustrations. Malacoceros reductus, only reported in New South Wales, Australia, is distinguishable from its relatives by a prostomium with lateral horns, reduction of chaetiger 1, and the presence of the tridentate hooded hooks. Pseudopolydora cf. kempi, which has been known to have a wide geographical distribution, is characterized by a prostomium incised anteriorly, the presence of the occipital antenna, and two rows of black spots on the dorsal side. In this paper, photographs of scanning electron microscopy for characteristic features of each species are presented.