韓国・済州島からScott, 1892年に発見された3種の新種（Crustaceaa, Copepoda, Calanoida, Stephidae）

Three new species of the genus Scott, 1892 (Crustacea, Copepoda, Calanoida, Stephidae) from Jeju Island, Korea.

• Seong Yong Moon
• Ho Young Soh
• Dae Hyun Cho

抄録

最近、韓国済州島沖の浅瀬の底生橈脚類を採集するために行われた一般的なフィールド調査で、Scott, 1892の新種3種の標本が数点採集された。この新種は，上顎前板基部にセタがないこと，雄の右脚５は非武装の爪状節および／またはミトン状節で終わること，などの特徴が組み合わされていることから，この属に属する。雌性器二重体は体長0.92mm、雌性器二重体の左側に突出した裂片を持つこと、性器二重体の遠位部を超える触角を持つこと、雄性脚5の末端部の複合体から先祖種と区別できる。 本種は体長が長く，雌では体長1.12 mm，触角が性器二重胸板の先端まで伸びていること，雌では性器上体節の腹面に微小な棘突起の列があることなどから近縁種と区別される。これまで世界では35種が知られていた。

During general field surveys carried out recently to collect benthopelagic copepods from near the substrate of the shallow waters off Jeju Island, Korea, a few specimens of three new species of Scott, 1892, were collected. The new species are placed in the genus because of the following combination of features: absence of seta on the basal exite of maxillule, and male right leg 5 ending in an unarmed claw-like and/or mitten-like segment. . can be distinguished from its congeners by body length 0.92 mm, left side of the female genital double-somite with protruding lobes, antennule that extends beyond the distal area of the genital double-somite, and the male leg 5 terminal complex. . can be distinguished from its congeners by the genital double-somite with protruding lobes on both sides, and the presence of larger spinules on the distomedial margin of leg 5. can be distinguished from its congeners by its longer body length, 1.12 mm long in the female, antennules that extend to the end of the genital double-somite, and the presence of a covered row of minute spinules on the ventral surface of the genital operculum in the female. Until now, 35 species of stephids were known worldwide.

Seong Yong Moon, Ho Young Soh, Dae Hyun Cho.