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The Korean Society of Phycology (한국조류학회(藻類))
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Genetic discontinuity of Digenea (Rhodomelaceae, Rhodophyta) from Mexico supports recognition of two new species, D. mexicana and D. rafaelii

  • Boo, Ga Hun (University Herbarium, University of California Berkeley) ;
  • Robledo, Daniel (Department of Marine Resources, Centro de Investigacion y Estudios Avanzados Unidad Merida) ;
  • Andrade-Sorcia, Gabriella (Programa de Investigacion en Botanica Marina, Departamento de Biologia Marina, Universidad Autonoma de Baja California Sur) ;
  • Boo, Sung Min (Department of Biology, Chungnam National University)
  • Received : 2018.07.08
  • Accepted : 2018.08.20
  • Published : 2018.09.15
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Abstract

Genetic continuity of Digenea simplex outside the Atlantic waters remains less studied, despite its long exposure to oriental folk medicine and wide distribution in tropical waters. Mitochondrial COI-5P and plastid rbcL sequences and morphology were investigated for plants from Mexico and additional specimens from Japan. Two new species, Digenea mexicana and Digenea rafaelii, are described for plants that would previously have been recognized as D. simplex in Mexico. D. mexicana grows to 10.5 cm tall and has cylindrical axes, irregular or di-, trichotomous branches, simple to branched determinate branchlets with eight pericentral cells, and tetrasporangia on inflated upper parts of determinate branchlets. It occurs intertidally in Quintana Roo, Yucatan Peninsula. D. rafaelii grows to 5 cm tall and has cylindrical axes, irregular or di-, trichotomous branches, and simple determinate branchlets with ten pericentral cells. It occurs intertidally in the Gulf of California. Both COI-5P and rbcL sequences revealed the genetic discontinuity between D. mexicana and D. rafaelii.

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References

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