著者

Taiga Kunishima Ken Maeda Ryutei Inui Yusuke Hibino

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.26, no.2, pp.343-349, 2021-10-14 (Released:2021-10-14)

参考文献数

34

被引用文献数

2

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A single specimen of Muraenichthys gymnopterus (Bleeker, 1853) was collected from a sandy intertidal flat having rocks and dead corals in the estuarine area of Nagura Amparu, Ishigaki-jima Island, southern Japan, in October 2020. This specimen collection constitutes the first record of M. gymnopterus from Japanese waters. In this study, the diagnostic characters between M. gymnopterus and M. hattae Jordan and Snyder, 1901 are provided, based on our morphological observations of 37 specimens, including Okinawan specimen, and previous studies, as follows: head length [M. gymnopterus 11.8–15.0% of total length (TL) vs. M. hattae 9.4–11.0%], trunk length (24–25.4% of TL vs. 28–31%), the horizontal distance from the dorsal-fin origin to a vertical line through the anus 73–87% of head length vs. 13–49%), the number of vertebrae (total 129–130 vs. 148–155; predorsal 30 vs. 47–53; preanal 41–44 vs. 51–55), the number of the lateral-line pores before the anus (43–45 vs. 51–55). Additionally, the body depth at the gill opening in TL and the trunk length in TL can also be used to distinguish between these two species (2.8–3.7% of TL vs. 1.4–3.0%). Although M. gymnopterus has previously been reported from tropical to temperate regions, we suspect that the records from temperate regions are based on misidentification of M. hattae.

著者

松井 彰子 乾 隆帝 甲斐 嘉晃 Shoko Matsui Ryutei Inui Yoshiaki Kai 京都大学フィールド科学教育研究センター 徳島大学大学院ソシオテクノサイエンス研究部 京都大学フィールド科学教育研究センター舞鶴水産実験所 Field Science Education and Research Center Kyoto University Institute of Technology and Science the University of Tokushima Maizuru Fisheries Research Station Field Science Education and Research Center

雑誌

大阪市立自然史博物館研究報告 = Bulletin of the Osaka Museum of Natural History (ISSN:00786675)

巻号頁・発行日

vol.68, 2014-03-31