Hildenbrandia (Hildenbrandiales, Florideophyceae) from Japan and taxonomic lumping of H. jigongshanensis and H. japananensis,Phycological Research

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Hildenbrandia (Hildenbrandiales, Florideophyceae) from Japan and taxonomic lumping of H. jigongshanensis and H. japananensis
Phycological Research ( IF 1.6 ) Pub Date : 2021-02-17 , DOI: 10.1111/pre.12456
Christophe Vieira ₁ , Shingo Akita _{1,

2} , Shinya Uwai ₁ , Takeaki Hanyuda ₁ , Satoshi Shimada ₂ , Hiroshi Kawai ₁

Affiliation

The genetic diversity of freshwater Hildenbrandia species (Florideophyceae, Hildenbrandiales) from Japan was reassessed based on specimens collected from Kagoshima (Kyushu), Hyogo and Kanagawa Prefectures (Honshu), using rbcL and 18S rDNA sequences. Phylogenetic results suggested the occurrence of only one species of freshwater Hildenbrandia in Japan, H. japananensis. The clade H. jigongshanensisâ€“H. japananensis is sister to H. rivularis. Hildenbrandia angolensis was paraphyletic and positioned basally among the freshwater Hildenbrandia clades. Furthermore, the genetic similarity between H. jigongshanensis and H. japananensis determined by rbcL and 18S sequences as well as the intraspecific morphological plasticity led us to the conclusion that the species from China and Japan were conspecific. Accordingly, we propose the taxonomic lumping of H. jigongshanensis and H. japananensis. In addition, we recommend additional molecular and morphological studies on Asian freshwater Hildenbrandia to determine whether H. jigongshanensis is conspecific with H. ramanaginae previously described from India.

更新日期：2021-02-17

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