Lee Geon Hyeok, Min Gi-Sik
Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea Inha University Incheon Republic of Korea.
Zookeys. 2022 May 16;1100:191-205. doi: 10.3897/zookeys.1100.80077. eCollection 2022.
A new spionid polychaete, , was discovered in the fine sandy sediments of an intertidal habitat from Korean waters. The new species is considered a simultaneous hermaphrodite, but no brooding embryos were found in any of the specimens collected in this study. This species is unique in the absence of ciliation in the anteriormost chaetigers. is morphologically most similar to Imajima, 1991 from Japan in having an elevation on the prostomium, conspicuously large and foliaceous branchiae, and intersegmental lateral pouches. However, the new species differs from the latter by the following characteristics: (1) large and lanceolate notopodial postchaetal lamellae of chaetiger 1, (2) transverse ciliated bands and ciliation on the inner branchiae absent in anteriormost chaetigers, and (3) pygidium with one pair of ventral cirri and numerous elongated dorsolateral cirri. Detailed description and illustrations of the new species are provided with molecular information on mitochondrial cytochrome c oxidase subunit I (COI), 16S ribosomal DNA (rDNA), nuclear 18S rDNA, and 28S rDNA.
在韩国海域潮间带栖息地的细砂质沉积物中发现了一种新的多毛纲矶沙蚕科动物， 。该新物种被认为是同时具有雌雄两性生殖器官的雌雄同体，但在本研究收集的任何标本中均未发现育雏胚胎。该物种最独特之处在于最前端的刚节没有纤毛。 在形态上与1991年来自日本的 最相似，都具有口前叶隆起、明显大且呈叶状的鳃以及节间侧袋。然而，新物种与后者的区别在于以下特征：（1）第1刚节的背须后刚毛片大且呈披针形，（2）最前端的刚节中没有横向纤毛带且内鳃上没有纤毛，（3）尾节有一对腹须和许多细长的背外侧须。提供了新物种的详细描述和图示以及线粒体细胞色素c氧化酶亚基I（COI）、16S核糖体DNA（rDNA）、核18S rDNA和28S rDNA的分子信息。
