A new species of tubulanid palaeonemertean, Tubulanus izuensis sp. nov., is described as the sixth member of the genus in Japanese waters, based on materials dredged at depths of 244–436 m. It can be differentiated from all the known congeners by the unique burnt-orange dorsal pattern consisting of a median longitudinal stripe and transverse bands on a white ground color. In a maximum-likelihood tree reconstructed with partial sequences of the 16S rRNA, cytochrome c oxidase subunit I, 18S rRNA, 28S rRNA, and histone H3 genes, Tubulanus was not monophyletic, while T. izuensis sp. nov. was more closely related to the type species T. polymorphusRenier, 1804 than some other congeners including T. punctatus (Takakura, 1898), T. rhabdotusCorrêa, 1954, T. sexlineatus (Griffin, 1898), and T. tamiasKajihara, Kakui, Yamasaki & Hiruta, 2015.

一种新的管状植物，古猿伊豆（Tubulanus izuensis sp。）。根据在244-436 m深度挖出的材料，Nov。被描述为日本水域的第六大类。它可以与所有已知的同类动物区分开，其独特的桔红色背侧图案由中间的纵向条纹和白色底色上的横向带组成。在最大似然树的的16S rRNA的部分序列重建，细胞色素c ^氧化酶亚基I，18S rRNA基因，28S rRNA和组蛋白H3的基因，Tubulanus不是单系，而T. izuensis藻。十一月 与多形变种雷尼尔·雷尼尔（T. polymorphus Renier，1804）类型物种的相关性比其他同系物更紧密T. punctatus（高仓，1898），T. rhabdotusCorrêa，1954，T. sexlineatus（Griffin，1898）和T. tamias Kajihara，Kakui，Yamasaki＆Hiruta，2015。