2025-05-21 東京海洋大学,水産研究・教育機構,千葉県立中央博物館,北里大学
図 3 江ノ島で採集したクロシオアマノリの葉状体.左がメス個体、右がオス個体を示す。スケールバー 10 cm
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- https://www.fra.go.jp/home/kenkyushokai/press/pr2025/20250521_press.html
- https://www.fra.go.jp/home/kenkyushokai/press/pr2025/files/press0521.pdf
日本におけるPyropia dentata複合体の隠れた多様性と太平洋沿岸産の新種Pyropia neodentataの記載 Hidden diversity of Pyropia dentata complex (Bangiales, Rhodophyta) in Japan, with description of a new species Pyropia neodentata from the Pacific coast of Japan
Sakurako Matsushita, Naho Takahashi, Miku Okamoto, Motoya Tamaki, Norio Kikuchi, Atsushi Kobiyama, Kyosuke Niwa
Phycological Research Published: 06 May 2025
DOI:https://doi.org/10.1111/pre.12587
SUMMARY
To clarify the genetic diversity of the Pyropia dentata complex in Japan, we conducted molecular analyses and morphological observations using samples collected from Amakusa region (the type locality), on the East China Sea coast, Hirado, on the Sea of Japan coast, and Enoshima, on the Pacific coast of Japan. Molecular phylogenetic analyses of the rbcL gene clearly indicated that the samples from Enoshima (Pyropia cf. dentata in a previous study) were a different species from P. dentata collected from Amakusa and Hirado. The samples from Amakusa and Hirado were also genetically different from each other based on the phylogenetic tree. However, it was inferred that the samples collected from these two localities reflected intraspecific variation in P. dentata. Although the morphological features of the samples from the three localities were similar, the samples from Enoshima differed from the samples from Amakusa and Hirado in the blade thickness and the division formula of zygotosporangia. Based on the molecular phylogenetic analyses and morphological observations using the samples from Enoshima, we describe a new species, Pyropia neodentata. Furthermore, this study demonstrated that the new species is distributed on the Pacific coast of Japan, whereas P. dentata is widely distributed from the East China Sea coast to the Sea of Japan coast, including Korea and China.
