We report two red algal species, Chondracanthus saundersii C.W. Schneider & C.E. Lane (Gigartinaceae, Gigartinales) and Schottera koreana M.S. Calderon, T.H. Seo & S.M. Boo (Phyllophoraceae, Gigartinales), from Japan for the first time based on molecular and morphological analyses. A C. saundersii specimen was collected at a depth of 35 m offshore of Mageshima Island, Kagoshima Prefecture, Japan. The rbcL and COI‐5P (cox1) sequences of C. saundersii form a clade with the type specimen from Bermuda and additional specimens from Cuba and Brazil. Morphologically, C. saundersii is characterized by the presence of secondary attachments, compressed to flattened axes up to 1 mm in width, and a looser medulla. Two specimens of S. koreana were collected in lower intertidal to subtidal waters at Ohara, Chiba Prefecture, and Matsuyama, Ehime Prefecture, Japan. The rbcL sequences of S. koreana were closely related to reported sequences of specimens from South Korea including the type specimens. Morphologically, S. koreana is characterized by the presence of unicellular colorless hair developed from cortical cells.

中文翻译：

---

基于分子和形态学分析的日本软骨藻和朝鲜Schottera koreana（Gigartinales，Rhodophyta）的新记录

我们首次基于分子和形态分析报告了两种红色藻种，分别是日本的软骨藻CW Schneider和CE Lane（Gigartinaceae，Gigartinales）和Schottera koreana MS Calderon，TH Seo和SM Boo（Phyllophoraceae，Gigartinales）。甲C. saundersii样品在35米近海马毛岛岛，鹿儿岛县，日本的深度收集。的RBC L和COI-5P（COX 1）的序列C. saundersii形成具有从百慕大模式标本和附加试样从古巴和巴西进化枝。从形态上讲，桑德梭菌其特点是存在辅助附件，其压缩至扁平轴的宽度最大为1 mm，并且髓质较松。在日本千叶县大原市和日本爱媛县松山市的潮间带至潮间带下部水域中采集了两个韩国血吸虫标本。该RBC的L个序列S.与朝鲜密切相关的来自韩国的标本包括模式标本报道的序列。从形态上讲，韩国链球菌的特征是存在从皮质细胞发育而来的单细胞无色毛发。