First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.

Freshwater specimens of an encrusting red alga were collected from three rivers in Tahiti, French Polynesia. Observed morphological features corresponded to those of the genus Hildenbrandia (Florideophyceae: Hildenbrandriales), confirmed by genetic data. rbcL and 18S rDNA sequences of the Tahitian s...

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Autores principales:	Christophe Vieira, Shingo Akita, Yi Sun Kim, Satoshi Shimada, Hiroshi Kawai, Mayalen Zubia
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	18S rDNA Freshwater algae New taxa Phylogenetics rbcL Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/f26052c492a6431eb70dff254a48f891
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spelling	oai:doaj.org-article:f26052c492a6431eb70dff254a48f8912021-11-28T04:32:53ZFirst record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.2287-884X10.1016/j.japb.2021.07.008https://doaj.org/article/f26052c492a6431eb70dff254a48f8912021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2287884X21000765https://doaj.org/toc/2287-884XFreshwater specimens of an encrusting red alga were collected from three rivers in Tahiti, French Polynesia. Observed morphological features corresponded to those of the genus Hildenbrandia (Florideophyceae: Hildenbrandriales), confirmed by genetic data. rbcL and 18S rDNA sequences of the Tahitian specimens were 4.95–5.15% and 0.94%, respectively, identical to those of a specimen from the Philippines. The Tahitian and Philippine lineages formed a well-supported monophyletic clade, which positioned basally to the rest of the freshwater Hildenbrandia clade. Tahitian specimen cells were 7.6–16.2 μm in diameter in surface view, were rectangular in cross section, were 11.6–16.4 μm long and 2–3 μm high, and presented filaments 37–240 μm long, occasionally branching. Although the cells were overall wider than in other freshwater differences were observed between the Tahitian and other species of Hildenbrandia. The genetic divergences and longer cell sizes between the Tahitian and Philippine lineages strongly indicated they were not conspecific. A formal description of the new species, Hildenbrandia tahitiensis sp. nov., is provided. This is the first report of the genus Hildenbrandia from French Polynesia. The present documentation of Hildenbrandia in a south central Polynesian locality extends our knowledge of the geographical range for this genus.Christophe VieiraShingo AkitaYi Sun KimSatoshi ShimadaHiroshi KawaiMayalen ZubiaElsevierarticle18S rDNAFreshwater algaeNew taxaPhylogeneticsrbcLEcologyQH540-549.5ENJournal of Asia-Pacific Biodiversity, Vol 14, Iss 4, Pp 607-612 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	18S rDNA Freshwater algae New taxa Phylogenetics rbcL Ecology QH540-549.5
spellingShingle	18S rDNA Freshwater algae New taxa Phylogenetics rbcL Ecology QH540-549.5 Christophe Vieira Shingo Akita Yi Sun Kim Satoshi Shimada Hiroshi Kawai Mayalen Zubia First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.
description	Freshwater specimens of an encrusting red alga were collected from three rivers in Tahiti, French Polynesia. Observed morphological features corresponded to those of the genus Hildenbrandia (Florideophyceae: Hildenbrandriales), confirmed by genetic data. rbcL and 18S rDNA sequences of the Tahitian specimens were 4.95–5.15% and 0.94%, respectively, identical to those of a specimen from the Philippines. The Tahitian and Philippine lineages formed a well-supported monophyletic clade, which positioned basally to the rest of the freshwater Hildenbrandia clade. Tahitian specimen cells were 7.6–16.2 μm in diameter in surface view, were rectangular in cross section, were 11.6–16.4 μm long and 2–3 μm high, and presented filaments 37–240 μm long, occasionally branching. Although the cells were overall wider than in other freshwater differences were observed between the Tahitian and other species of Hildenbrandia. The genetic divergences and longer cell sizes between the Tahitian and Philippine lineages strongly indicated they were not conspecific. A formal description of the new species, Hildenbrandia tahitiensis sp. nov., is provided. This is the first report of the genus Hildenbrandia from French Polynesia. The present documentation of Hildenbrandia in a south central Polynesian locality extends our knowledge of the geographical range for this genus.
format	article
author	Christophe Vieira Shingo Akita Yi Sun Kim Satoshi Shimada Hiroshi Kawai Mayalen Zubia
author_facet	Christophe Vieira Shingo Akita Yi Sun Kim Satoshi Shimada Hiroshi Kawai Mayalen Zubia
author_sort	Christophe Vieira
title	First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.
title_short	First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.
title_full	First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.
title_fullStr	First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.
title_full_unstemmed	First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.
title_sort	first record of the genus hildenbrandia (florideophyceae: hildenbrandiales) from french polynesia and description of h. tahitiensis sp. nov.
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/f26052c492a6431eb70dff254a48f891
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First record of the genus Hildenbrandia (Florideophyceae: Hildenbrandiales) from French Polynesia and description of H. tahitiensis sp. nov.

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