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Beneath the hairy look: the hidden reproductive diversity of the Gibsmithia hawaiiensis complex (Dumontiaceae, Rhodophyta

Gabriel, Daniela ; Draisma, Stefano G. A. ; Schmidt, William E. ; Schils, Tom ; Sauvage, Thomas ; Maridakis, Clio ; Gurgel, C. Frederico D. ; Harris, D. James ; Fredericq, Suzanne

Journal of Phycology, December 2017, Vol.53(6), pp.1171-1192 [Periódico revisado por pares]

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  • Título:
    Beneath the hairy look: the hidden reproductive diversity of the Gibsmithia hawaiiensis complex (Dumontiaceae, Rhodophyta
  • Autor: Gabriel, Daniela ; Draisma, Stefano G. A. ; Schmidt, William E. ; Schils, Tom ; Sauvage, Thomas ; Maridakis, Clio ; Gurgel, C. Frederico D. ; Harris, D. James ; Fredericq, Suzanne
  • Assuntos: Coi ‐5p ; Cryptic Species ; Dna Barcode ; Dumontiaceae ; Gibsmithia Hawaiiensis Complex ; Phylogenetics ; Rbc L ; Species Delimitation Methods ; Taxonomy ; Upa
  • É parte de: Journal of Phycology, December 2017, Vol.53(6), pp.1171-1192
  • Descrição: The tropical alga previously recognized as (Dumontiaceae, Rhodophyta) was recently suggested to represent a complex of species distributed throughout the Indo‐Pacific Ocean and characterized by a peculiar combination of hairy (pilose) gelatinous lobes growing on cartilaginous stalks. Phylogenetic reconstructions based on three genetic markers are presented here with the inclusion of new samples. Further diversity is reported within the complex, with nine lineages spread in four major phylogenetic groups. The threshold between intra‐ and interspecific relationships was assessed by species delimitation methods, which indicate the existence of 8–10 putative species in the complex. Two species belonging to the complex are described here: sp. nov. from the Coral Triangle and sp. nov., widely distributed in the Central and Eastern Indo‐Pacific. Morphological differences in the vegetative and reproductive structures of the newly described species are provided and compared to the previously described species of the complex. Additional lineages represent putative species, which await further investigation to clarify their taxonomic status. sensu stricto is confirmed to be endemic to the Hawaiian Islands, and is apparently confined to the Red Sea, with an expanded distribution in the region. New records of the complex are reported from Egypt, Saudi Arabia, Indonesia, Philippines, and the Federated States of Micronesia, indicating that the complex is more broadly distributed than previously considered. The isolated position of within the Dumontiaceae is corroborated by molecular data.

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