Jimi Naoto, Fujimoto Shinta, Fujiwara Yoshihiro, Oguchi Kohei, Miura Toru
Sugashima Marine Biological Laboratory, Graduate School of Science, Nagoya University, Toba, Japan.
Centre for Marine & Coastal Studies, Universiti Sains Malaysia, Penang, Malaysia.
PeerJ. 2022 Mar 8;10:e13044. doi: 10.7717/peerj.13044. eCollection 2022.
Four new species of annelids, sp. nov., sp. nov., sp. nov., and sp. nov., are described based on specimens collected from Japanese waters. sp. nov. inhabits the interstitial environment and can be distinguished from the other congeners by the following features: () total of 16 chaetigers, () chaetigers 1-3 with stout hooks, () minute body (approximately 1 mm in length), () all parapodia with the same number of chaetae (two notochaetae; two neurochaetae), and () presence of dorsal and ventral papillae. sp. nov. lives under intertidal stones and can be distinguished from other congeners by having pectinate neurochaetae. sp. nov. inhabits the interstitial environment and can be distinguished from other congeners by: () absence of annulation on the peristomium and achaetous segment and () presence of a heart body in chaetigers 4-5. sp. nov. inhabits whale bones and can be distinguished from other congeners by the following features: () presence of a heart body in chaetigers 9-14, () presence of capillary neurochaetae on chaetiger 1, and () presence of simple curved spines. A phylogenetic tree based on partial sequences of cytochrome oxidase subunit I and 16S rRNA from the new species and other cirratulid worms showed that is included in Cirratuliformia. This is the first record of and from Japanese waters.
基于从日本海域采集的标本，描述了四种新的环节动物，分别为新物种1、新物种2、新物种3和新物种4。新物种1栖息于间隙环境，可通过以下特征与其他同属物种区分开来：（1）共有16个刚节；（2）第1 - 3刚节具粗壮的钩；（3）身体微小（体长约1毫米）；（4）所有疣足的刚毛数量相同（两根背刚毛；两根腹刚毛）；（5）存在背侧和腹侧乳头。新物种2生活在潮间带的石块下，可通过具栉齿状腹刚毛与其他同属物种区分开来。新物种3栖息于间隙环境，可通过以下特征与其他同属物种区分开来：（1）口前叶和无刚毛节无环纹；（2）第4 - 5刚节有心脏体。新物种4栖息于鲸骨，可通过以下特征与其他同属物种区分开来：（1）第9 - 14刚节有心脏体；（2）第1刚节有毛细管状腹刚毛；（3）存在简单的弯曲刺。基于新物种和其他丝鳃虫的细胞色素氧化酶亚基I和16S rRNA部分序列构建的系统发育树表明，新物种属于丝鳃虫目。这是新物种1和新物种3在日本海域的首次记录。
