Bibliographic Detail
Geraldino, P.J.L., Yang, E.C. Kim, M.-S. & Boo, S.-M., 2009
Reference:
Geraldino, P.J.L., Yang, E.C. Kim, M.-S. & Boo, S.-M. (2009). Systematics of Hypnea asiatica sp. nov. (Hypneaceae, Rhodophyta) based on morphology and nrDNA SSU, plastid rbcL, and mitochondrial cox1. Taxon 58(2): 606-616.
Abstract:
Hypnea is an economically and ecologically important red alga including about 53 species worldwide. Here, we
describe H. asiatica sp. nov. from Korea, Japan, and Taiwan. Specimens of this species from the northwestern
Pacific have often been assigned to H. charoides. Hypnea asiatica is distinguished by percurrent main axes,
branches with abruptly curved adaxial branchlets, and the presence of lenticular thickening in the walls of
medullary cells. It is abundant in wave-exposed sites from summer through fall and produces tetrasporangial
sori in fall. We analyzed three genes from three different genomes: nuclear SSU rDNA from 27 specimens,
plastid rbcL from 51 specimens, and mitochondrial cox1 from 41 specimens, including putative relatives and
H. charoides from Australia. All analyzed DNA datasets produced congruent trees in which H. asiatica was
always separated from H. charoides. Network analysis of cox1 haplotypes indicated geographic structuring
across the species distribution range. Although Hypnea was found to be monophyletic, the distant relationship
between H. asiatica and the other species raises questions about divergence pathways within the genus
