Morphometric and molecular analyses confirm two distinct species of <i>Calliarthron</i> (Corallinales, Rhodophyta), a genus endemic to the northeast Pacific

Gabrielson, Paul W.; Miller, Kathy Ann; Martone, Patrick T.

doi:10.2216/10-42.1

Cited by 83 publications

(145 citation statements)

References 33 publications

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“…2). DNA extraction, amplification and sequencing were performed according to Gabrielson et al (2011). A new internal forward rbcL primer, F1150Cor 5'-GGTATACATTGTGGACAAATGC-3' was used in combination with reverse rbcS (Freshwater & Rueness 1994).…”

Section: Methodsmentioning

confidence: 99%

Mesophyllum erubescens (Corallinales, Rhodophyta)—so many species in one epithet

et al. 2014

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The name Mesophyllum erubescens has been applied to protuberant rhodolith specimens which sometimes occur abundantly, as well as to encrusting specimens in tropical and temperate waters in the Western Pacific, Indian and Western Atlantic Oceans. A DNA sequence, representing about 20% of the rbcL gene, was obtained from the 140 year old holotype specimen collected in the Fernando de Noronha Archipelago by the Challenger Expedition. This sequence was identical to field-collected topotype specimens as well as to specimens ranging south along the coast of Brazil. Sequences for psbA from these same Brazilian specimens and specimens from the east coast of Mexico were identical or differed by 1 base pair. In contrast, specimens called M. erubescens based on morpho-anatomical characters in the Pacific Ocean differed from Western Atlantic Ocean specimens by 2.5-13.1%, indicating that these represent numerous distinct species. All reports of non-geniculate coralline species said to be widely distributed across different oceans or in different biogeographic provinces based on morpho-anatomical characters need to be verified by DNA sequences.

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Section: Methodsmentioning

confidence: 99%

Mesophyllum erubescens (Corallinales, Rhodophyta)—so many species in one epithet

et al. 2014

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“…Here, rbcL sequence divergence values for these taxa (LAF6556A, LAF6557A, and LAF6735) comprised between 0-2.1%, with LAF6735 being the most distant. For comparison, in Calliarthron, Gabrielson et al (2011) reported species boundaries as low as .57%. Based on these values, LAF6735 may represent a separate entity, which further sampling in this clade with additional markers might help clarify.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies of other groups of Florideophytes (Gabrielson 2008, Lindstrom et al 2011 as well as Corallinales (Gabrielson et al 2011, Hind et al 2014 have shown the importance of sequencing type material.…”

Section: Discussionmentioning

confidence: 99%

New Insights into the Genus Lithophyllum (Lithophylloideae, Corallinaceae, Corallinales) from Deepwater Rhodolith Beds Offshore the NW Gulf of Mexico

Richards¹,

Gabrielson²,

Fredericq³

2014

Phytotaxa

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Hard bank rhodolith beds at 45-80 m depth offshore Louisiana in the Northwestern Gulf of Mexico harbor a diverse community of non-geniculate coralline algae spanning multiple lineages including both rhodolith-forming (biogenic) taxa and others encrusting autogenic rhodoliths. Identifying these members of the Corallinales to the correct genus and species is an ongoing process because many available names need to be validated by comparison to historical type specimens. A phylogenetic analysis of concatenated plastid (psbA), nuclear (LSU rDNA), and mitochondrial (COI) DNA sequences of non-geniculate corallines belonging to the subfamily Lithophylloideae (Corallinaceae), including newly generated sequences from recently collected specimens dredged at Ewing and Sackett Banks following the April 2010 Deepwater Horizon oil spill, reveals at least two distinct species of Lithophyllum sensu lato for the region. Scanning Electron Microscopy confirmed the presence of vegetative characters congruent with those for both Lithophyllum and Titanoderma. Lithophyllum is a newly reported genus for the northern Gulf of Mexico. The generic boundaries within the Lithophylloideae are addressed in light of possible evolutionary progenetic heterochrony that may have occurred within this subfamily.

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“…The psbA is the preferred marker used by Bittner et al 2011, being also short and informative, in agreement with Broom et al 2008; the SSU rDNA has a long history of usage on phylogeny inferences including the Corallinophycidae L.Le Gall & G.W. Saunders (2007Saunders ( : 1129, therefore Paulsilvella SSU rDNA sequences will be very relevant to help on future complete datasets on Lithophylloideae; rbcL has traditionally been used for phylogeny inferences in Florideophyceae Yoon et al 2006;Le Gall & Saunders, 2010), but has never been tried on a exclusively Corallinophycidae investigation except with the Corallinoideae (Gabrielson et al 2011;Martone et al 2012). The host species Jania rubens, Amphiroa sp.…”

Section: Molecular Proceduresmentioning

confidence: 97%

Systematic position of Paulsilvella in the Lithophylloideae (Corallinaceae, Rhodophyta) confirmed by molecular data

2014

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New specimens of Paulsilvella huveorum were collected in Brazil at Baía de Ilha Grande, Rio de Janeiro, and Sebastião Gomes reef, Bahia. These new collections represent a relevant range extension and new hosts for the species (Amphiroa beauvoisii, Jania cubensis and non-identified Hydrozoa and Bryozoa) and enabled the first DNA amplifications for Paulsilvella. The systematic position of Pausilvella in the subfamily Lithophylloideae is confirmed based on SSU rDNA, psbA and rbcL molecular markers. Morphologically and anatomically the specimens are similar to the original description in which basal dimerous thalli with monomeric erect branches characterize the genus. But, the analyzed carposporangial conceptacles express the roof position varying from flush or above the thallus surface, the chambers always buried within tiers of columnar cells, suggesting that this feature is variable within the species and might also suggest that P. huveorum and the fossil P. antiqua should be considered as potential synonyms. We do not want to suggest this clump waiting for more collections from different geographical areas where new data may support our idea. Our results strongly suggest that the subfamily Lithophylloideae urgently needs to be reviewed to delimit genera based on molecular and morphological analysis because monomeric and dimeric thalli organization have evolved several times in the group.

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Morphometric and molecular analyses confirm two distinct species of Calliarthron (Corallinales, Rhodophyta), a genus endemic to the northeast Pacific

Cited by 83 publications

References 33 publications

Mesophyllum erubescens (Corallinales, Rhodophyta)—so many species in one epithet

Mesophyllum erubescens (Corallinales, Rhodophyta)—so many species in one epithet

New Insights into the Genus Lithophyllum (Lithophylloideae, Corallinaceae, Corallinales) from Deepwater Rhodolith Beds Offshore the NW Gulf of Mexico

Systematic position of Paulsilvella in the Lithophylloideae (Corallinaceae, Rhodophyta) confirmed by molecular data

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