著者

泉 貴人 藤井 琢磨 柳 研介

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.46, pp.54-63, 2019-02-28 (Released:2019-03-23)

参考文献数

22

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Until recently, Actiniaria had been classified by the classification system organized by Carlgren in 1949. This classification was based on several traditional morphological features such as mesenterial arrangement, basal disc, acontium, and sphincter muscle. Although this classification system had been used for around 60 years, it was recently called into question by several studies utilizing molecular phylogenetic analyses. The most comprehensive phylogenetic analyses clarified that the Carlgren classification system did not reflect the actual phylogenetic relationships, and thus a new classification system from suborder to superfamily was established. At the same time, new common morphological features were proposed as the traditional morphological features of sea anemones in Carlgren’s classification system were proven to not be monophyletic. Here, we introduce the new classification system and propose Japanese names for all taxa higher than family.

著者

泉 貴人 藤井 琢磨 柳 研介 藤田 敏彦

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.48, pp.13-19, 2020-02-29 (Released:2020-03-13)

参考文献数

13

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Isactinernus quadrilobatus Carlgren, 1918, the only species of genus Isactinernus, is characterized by an oral disc with four equally-sized lobes. In 2003 Synactinernus flavus Carlgren, 1918, which is characterized by four large and four small lobes alternately arranged, was synonymized into I. quadrilobatus because the difference of lobe shape was thought to be intraspecific variation, and thus the genus Synactinernus was also synonymized into Isactinernus. However, our molecular phylogenetic analysis of Actinernidae including I. quadrilobatus collected from the Kumano Sea revealed that I. quadrilobatus is genetically distinct from S. flavus. Our morphological comparison between the two species supported the result of the molecular analysis. Consequently, the genus Synactinernus was re-established and separated from Isactinernus. Additionally, during this study, we discovered and described an additional species of the genus, Synactinernus churaumi Izumi and Fujii, 2019.