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Kapraunia silviae (Rhodomelaceae, Rhodophyta), a new species from the South Atlantic Ocean

  • Jhullyrson O.F. de Brito

    Jhullyrson O.F. de Brito is a biologist, with a Master’s degree in Botany from Federal Rural University of Pernambuco. He was an intern at MAC Herbarium, working on botanical collections. His major field of research is taxonomy, systematics and evolution of seaweeds. Currently, he is PhD student at the University of São Paulo, São Paulo, Brazil, where he has been working in taxonomy, systematics and molecular phylogeny of the genus Polysiphonia sensu lato from the Brazilian coast.

     ORCID logo EMAIL logo     and Valéria Cassano

    Valéria Cassano is Herbarium Curator at the University of São Paulo (SPF-Algae). She received her PhD at the Institute of Botany, São Paulo for her research on the taxonomy and phylogeny of the Laurencia complex (Ceramiales, Rhodophyta). She is currently Assistant Professor at the Department of Botany, University of São Paulo focusing her research on systematics and molecular phylogeny of seaweeds.

     ORCID logo
Published/Copyright: July 3, 2024
Botanica Marina
From the journal Botanica Marina Volume 67 Issue 4

Abstract

Kapraunia is a genus recently segregated from Polysiphonia sensu lato, with only four species so far known. However, no species have been found on the South Atlantic coast. Recent collections in southwestern Brazil revealed specimens morphologically similar to Kapraunia spp. To investigate the identity of these specimens, we carried out a morphological and molecular study based on COI-5P and rbcL sequences. Phylogenetic analysis placed our samples within the genus Kapraunia as a new species with full support, described here as Kapraunia silviae sp. nov. K. silviae is recognizable by a combination of characters such as attachment by a basal disc and a prostrate system, branches developing laterally to the trichoblasts, 5–6 pericentral cells, rarely 4. The species differs from K. pentamera by the attachment form, segment proportions and tetrasporangial dimensions, and from K. schneideri by the number of pericentral cells, branch development and tetrasporangial arrangement. Re-examination of herbarium samples from Brazil in older collections also revealed misidentifications of K. silviae as “Carradoriella denudata”. This new species seems to be restricted to the Brazilian coast, being found only on the northern coast of São Paulo state. Our results reinforce the need for revision of Polysiphonia s.l. species on the Brazilian coast.

Keywords: COI-5P; molecular phylogeny; Polysiphonia sensu lato ; rbcL; Streblocladieae
Corresponding author: Jhullyrson O.F. de Brito, Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, 05508-090 São Paulo, Brazil, E-mail:

Funding source: São Paulo Research Foundation (FAPESP)

Award Identifier / Grant number: 2022/12597-0, 2022/13278-6

Funding source: FAPESP

Award Identifier / Grant number: 2021/14076-5

Funding source: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) – Finance Code 001 and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Award Identifier / Grant number: 165693/2021-5

Funding source: CNPq

Award Identifier / Grant number: 304141/2020-8

About the authors

Jhullyrson O.F. de Brito

Jhullyrson O.F. de Brito is a biologist, with a Master’s degree in Botany from Federal Rural University of Pernambuco. He was an intern at MAC Herbarium, working on botanical collections. His major field of research is taxonomy, systematics and evolution of seaweeds. Currently, he is PhD student at the University of São Paulo, São Paulo, Brazil, where he has been working in taxonomy, systematics and molecular phylogeny of the genus Polysiphonia sensu lato from the Brazilian coast.

Valéria Cassano

Valéria Cassano is Herbarium Curator at the University of São Paulo (SPF-Algae). She received her PhD at the Institute of Botany, São Paulo for her research on the taxonomy and phylogeny of the Laurencia complex (Ceramiales, Rhodophyta). She is currently Assistant Professor at the Department of Botany, University of São Paulo focusing her research on systematics and molecular phylogeny of seaweeds.

Acknowledgments

We are very grateful to Michael Wynne for his critical comments on the manuscript.

  1. Research ethics: Not applicable.

  2. Author contributions: JOFB, investigation, formal analysis, writing – original draft preparation; VC, conceptualization, formal analysis, investigation, writing – original draft preparation, project administration, funding acquisition. Both authors agree with the content of the paper and its submission and publication.

  3. Competing interests: The authors declare that they have no conflict of interest.

  4. Research funding: The authors thank São Paulo Research Foundation (FAPESP, 2022/12597-0, 2022/13278-6) for the financial support. JOFB thanks FAPESP (2021/14076-5) for the doctoral grant awarded. This work was supported in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) – Finance Code 001 and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (165693/2021-5). VC thanks CNPq for the Productivity Fellowship (304141/2020-8).

  5. Data availability: The DNA sequences are available in the public database, National Center for Biotechnology Information, and specimens are deposited in the indexed herbarium SPF.

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/bot-2023-0101).

Received: 2023-11-27
Accepted: 2024-05-29
Published Online: 2024-07-03
Published in Print: 2024-08-27

© 2024 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/bot-2023-0101
Keywords for this article
COI-5P; molecular phylogeny; Polysiphonia sensu lato; rbcL; Streblocladieae

Articles in the same Issue

  1. Frontmatter
  2. In this issue
  3. Physiology and Ecology
  4. Gambierdiscus carpenteri (Dinophyceae) from Bahía de La Paz, Gulf of California: morphology, genetic affinities, and mouse toxicity
  5. New record of the green macroalga Gayralia brasiliensis (Ulotrichales, Chlorophyta) in Singapore
  6. Taxonomy/Phylogeny and Biogeography
  7. Three new Lobophora species (Dictyotales, Phaeophyceae) from Phuket on the west coast of Thailand
  8. Proposal of Cryptonemia floridana comb. nov. (Halymeniaceae, Rhodophyta) based on rbcL gene analysis of collections from type locality and female reproductive morphology
  9. Kapraunia silviae (Rhodomelaceae, Rhodophyta), a new species from the South Atlantic Ocean
  10. Pseudogomphonema lukinicum sp. nov. (Bacillariophyceae), a new endophytic diatom found inside multicellular red algae from the Northwest Pacific
  11. Morphology and molecular phylogeny of Gonyaulax kunsanensis sp. nov. (Gonyaulacales, Dinophyceae) from Korean coastal waters
  12. Introducing a new species, Vaginatispora acrostichi (Lophiostomataceae), based on morphology and multigene phylogeny
  13. Genomics
  14. Evaluation of cryptic invasion in Japanese Undaria populations based on mitochondrial haplotypic analysis
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