Phylogenetic affinities of genera Acanthopeltis and Yatabella (Gelidiales, Rhodophyta) inferred from molecular analyses

Shimada, Shoichi; Horiguchi, Takeo; Masuda, Michio

doi:10.2216/i0031-8884-38-6-528.1

Cited by 70 publications

(57 citation statements)

References 14 publications

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“…Our results indicate that G. crinale is a cosmopolitan species, although there are high morphological variations and intraspecific divergences. This result is in agreement with previous studies showing that G. crinale is distributed globally (Shimada et al 1999, Millar and (Freshwater and Rueness 1994, Freshwater et al 1995, Shimada et al 1999, Millar and Freshwater 2005, Kim et al 2011.…”

Section: Distribution Of Gelidium Crinale and G Pusillumsupporting

confidence: 94%

Phylogenetic relationships and distribution of Gelidium crinale and G. pusillum (Gelidiales, Rhodophyta) using cox1 and rbcL sequences

Kim¹,

Boo²

2012

ALGAE

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The taxonomic distinctiveness and cosmopolitan distributions of the red algae Gelidium crinale and G. pusillum remain unclear. Both species were first described in Devon in southwestern England; namely in Ilfracome for G. crinale and Sidmouth for G. pusillum. We analyzed mitochondrial cox1 and plastid rbcL sequences from specimens collected in East Asia, Australia, Europe and North America. In all phylogenetic analyses of cox1 and rbcL sequences, G. crinale was distinct from congeners of the genus. The analyses also revealed a sister relationship with the G. coulteri and G. capense clade. Nineteen cox1 haplotypes were identified for G. crinale, and they were likely geographically structured. Despite the distinctiveness in both cox1 and rbcL datasets, the sister relationship of G. pusillum in the genus was not resolved. Our cox1 and rbcL datasets indicate that G. crinale is a cosmopolitan species, found in East Asia, Australia, Europe and North America, while the distribution of G. pusillum is restricted to Europe and Atlantic North America. Our results suggest that infraspecific classification of G. pusillum may be abandoned.Key Words: cox1; distribution; Gelidium crinale; Gelidium pusillum; phylogeny; rbcL INTRODUCTIONGelidium Lamour. is composed of approximately 127 described species distributed globally along tropical, subtropical, and artic shorelines (Freshwater and Rueness 1994, Shimada et al. 2000, Millar and Freshwater 2005, Kim et al. 2011, in press, Guiry and Guiry 2012. Members of the genus can be the most abundant organisms within intertidal algal assemblages. Gelidium is economically important as food, and one of the most promising agar sources in rhodophytes. It has recently been used for industrial paper pulp production in Korea (Seo et al. 2010). However, identification of individual Gelidium specimens is notoriously difficult because of the high degree of morphological variation, particularly in the smaller and medium-sized species (Dixon and Irvine 1977a).Gelidium crinale (Hare ex Turner) Gallion and G. pusillum (Stackhouse) Le Jolis, which are small and morphologically diverse, are among the most difficult species to identify in red algae, and their distributions are unclear. These species are traditionally recognized as two distinct species (Feldmann and Hamel 1936, Silva et al. 1996), and Womersley and Guiry (1994 found a difference between the types of G. crinale and G. pusillum. On the contrary, G. crinale and G. pusillum were merged by Irvine (1977a, 1977b). Seven to nine varieties or formas have been described in each of G. crinale and G. pusillum (Silva et al. 1996, Guiry andGuiry 2012). The name G. pusillum is commonly used for any small tuft-forming Gelidium (Silva et al. 1996). Although G. crinale and G. pusillum are considered as the most widely distributed species in the genus AlgaeBase (Guiry and Guiry 2012), the occurrence -42-822-9690 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommo...

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Section: Distribution Of Gelidium Crinale and G Pusillumsupporting

confidence: 94%

Phylogenetic relationships and distribution of Gelidium crinale and G. pusillum (Gelidiales, Rhodophyta) using cox1 and rbcL sequences

Kim¹,

Boo²

2012

ALGAE

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“…The difference between rbcL sequences of P. leliaertii and P. 'pectinata' from South Africa falls within the ranges of intraspecific sequence variability reported for various other species in the Gelidiales (Freshwater & Rueness, 1994). However, species have been recognized previously despite their rbcL sequences being 4 0.3% divergent from their sister taxa (Shimada et al, 1999(Shimada et al, , 2000. Sequence divergence can be useful as a guide to the delimitation of species but is confounded by variation in the pace of molecular evolution (mutation occurrence and fixation), and the fact that morphological and protein characters may evolve independently, and at rates that differ among recently diverged species (Ferguson, 1980).…”

Section: Discussionsupporting

confidence: 65%

Ptilophora leliaertii and Ptilophora coppejansii, two new species of Gelidiales (Rhodophyta) from South Africa

Tronchin

Clerck

Freshwater

et al. 2004

European Journal of Phycology

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“…Two of these had sequences showing 100% similarity to species known from the Japanese archipelago and its surroundings. The rbcL sequence of the species found in the Oosterschelde estuary was identical to sequences of Gelidium vagum Okamura from the eastern coast of Honshu (Japan) (Genbank AB017680) and Korea (Genbank HM629838, HM629839, HM629840) (Shimada et al 1999;Kim et al 2011). One of the three species found in the Gulf of Morbihan showed identical rbcL sequences to Gracilariopsis chorda (Holmes) Ohmi from Korea, Japan and China (Genbank EU67342, EU567345, EF434904) Yang et al 2008).…”

Section: Resultsmentioning

confidence: 75%

Four new exotic red seaweeds on European shores

Mineur

Roux²,

Stegenga

et al. 2012

Biol Invasions

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We report the occurrence of four red macroalgae new to Europe. Two species were unambiguously determined to the species level with a DNA barcoding approach, while the remaining two species could only be assigned to a genus. Gelidium vagum was found in the Oosterschelde estuary the Netherlands). Gracilariopsis chorda, Chondracanthus sp. and Solieria sp. were found in the Gulf of Morbihan in Brittany (France); Solieria sp. was also subsequently observed in the Thau Lagoon (France). Gelidium vagum and Gracilariopsis chorda are species originating from the north-western Pacific, around the Japanese archipelago. Phylogenetic analyses also show a likely Pacific origin for Chondracanthus sp. and Solieria sp. Three of these species are likely to have been introduced after 2008, indicating some active transport pathways between the Pacific and the north-eastern Atlantic. These findings also underline the importance of consistent and continuous local expertise (versus rapid assessment) in early warning systems

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Phylogenetic affinities of genera Acanthopeltis and Yatabella (Gelidiales, Rhodophyta) inferred from molecular analyses

Cited by 70 publications

References 14 publications

Phylogenetic relationships and distribution of Gelidium crinale and G. pusillum (Gelidiales, Rhodophyta) using cox1 and rbcL sequences

Phylogenetic relationships and distribution of Gelidium crinale and G. pusillum (Gelidiales, Rhodophyta) using cox1 and rbcL sequences

Ptilophora leliaertii and Ptilophora coppejansii, two new species of Gelidiales (Rhodophyta) from South Africa

Four new exotic red seaweeds on European shores

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