• Animal Systematics, Evolution and Diversity
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• 제31권1호
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• pp.15-21
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• 2015

Two species of mysid, Nipponomysis fusca (Ii, 1936) and N. tenuiculus (Ii, 1940), are newly recorded in Korean fauna. These two species were collected using a light or a bait trap from all coasts of the Korean peninsula. The genus Nipponomysis can be distinguished from allied genus by the following morphological characteristics: third to eighth thoracic endopods with carpopropodus divided into five to six subsegments compared to three subsegments, and anterior four pairs of pleopod in female subequal in length and fifth pair elongated. Nipponomysis fusca is characterized by its acute rostral plate and armature of telson, and N. tenuiculus differs from other species by the number of spine in ventral statocyst region and the shape of the fourth pleopod in male. Herein, we present detailed descriptions of two species from Korean waters with illustrations of morphology. In addition, an identification key to the Korean species of the genus is provided.

• Fisheries and Aquatic Sciences
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• 제27권3호
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• pp.137-144
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• 2024

Exacanthomysis marsailiae and Nipponomysis neolingvura are described as new species based on specimens collected with a light trap off the East Sea coast of Korea. E. marsailiae is closely related to Exacanthomysis alaskensis (Banner, 1954) and Exacanthomysis borealis (Banner, 1954). However, E. marsailiae can be distinguished from these species by having slightly grouped spines on lateral margins near the telson apex, and the exopod of male's fourth pleopod more than twice as long as the endopod. N. neolingvura can be distinguished from its closest relative, Nipponomysis lingvura (Murano, 1977), in that the lateral sides of the telson are all armed with spines without any empty space, and that the second segment of the fourth male pleopod is longer than the third one. The report of E. marsailiae from the East Sea of Korea extends the distribution range of the genus Exacanthomysis from the high-latitude North Pacific southward to the mid-latitude waters of the western Pacific. The morphological characteristics of the two current new species are also compared with those of their congeners.

• Animal Systematics, Evolution and Diversity
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• 제28권1호
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• pp.59-67
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• 2012

The order Mysida Haworth, 1825 consists of four families. Of these, only family Mysidae Dana, 1850 has been reported in Korea. Two opossum shrimps, Nipponomysis calcarata Takahashi and Murano, 1986 and Exacanthomysis japonica Murano, 1991 belonging to the tribe Mysini of Mysidae, are reported for the first time from Korean waters. The present study is the second report of these two species in the world. The illustrations and descriptions of these species are provided herein. As a result of this study, 47 species of opossum shrimps including N. calcarata and E. japonica are now recorded on the mysids in Korean fauna.

• Ocean Science Journal
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• 제42권3호
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• pp.171-178
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• 2007

The present study reports mysids on sandy beaches along the eastern coast of Korea. Samples were collected with a dip net or a sled net in sandy shores in April 1995 and November 2006. 9 species representing five genera were identified from the present study. Of these, the genus Nipponomysis including N. lingvura, N. ornata, and N. imparis, and Acanthomysis nakazatoi were newly recorded from the Korean waters. Morphological descriptions and taxonomic key to species were given. The present study reports that 45 species belonging to 15 genera from the Korean waters have been recorded.