Yoshino Hiroki, Ohsawa Takeshi A
Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan..
Zootaxa. 2019 Jan 24;4550(2):236-250. doi: 10.11646/zootaxa.4550.2.5.
Previous research on the mitochondrial COI gene sequences of several populations of Limnoria nagatai Nunomura suggested a cryptic species from the Sea of Japan. A new species of algal-boring limnoriid is here described. Limnoria furca sp. nov. was collected from the holdfasts of Eisenia bicyclis on the Oki Islands and the Sea of Japan coast of Honshu and Kyushu Islands, Japan. L. furca sp. nov. is diagnosed morphologically by lacking a mandibular palp, faint subparallel carinae on the pleotelson, faint Y-shaped carinae on pereonite 5, the bifid lacinia mobilis of right mandible and the shapes of the secondary unguis on the pereopods. Similar species, L. segnoides Menzies, 1957 and L. nagatai Nunomura, 2012, are redescribed on the basis of the holotypes.
此前对数群长木吉氏团水虱（Limnoria nagatai Nunomura）线粒体细胞色素氧化酶亚基I（COI）基因序列的研究表明，日本海存在一个隐存种。本文描述了一种新的钻蚀藻类的团水虱。新种长叉团水虱（Limnoria furca sp. nov.）采自日本隐岐群岛以及本州岛和九州岛日本海沿岸的昆布（Eisenia bicyclis）固着器。长叉团水虱新种在形态上的诊断特征为：无下颌须， pleotelson上有模糊的近平行隆线，第5腹节上有模糊的Y形隆线，右下颌的活动片二分，以及步足上次生爪的形状。基于正模标本对相似物种，即1957年的迟缓团水虱（L. segnoides Menzies）和2012年的长木吉氏团水虱（L. nagatai Nunomura）进行了重新描述。
