<i>Grateloupia ramosa</i> Wang & Luan sp. nov.(Halymeniaceae, Rhodophyta), a new species from China based on morphological evidence and comparative <i>rbc</i>L sequences -- Journal of Oceanology and Limnology,2016,34(2):283-294

	Cite this paper:
	CAO Cuicui, LIU Miao, GUO Shaoru, ZHAO Dan, LUAN Rixiao, WANG Hongwei. Grateloupia ramosa Wang & Luan sp. nov.(Halymeniaceae, Rhodophyta), a new species from China based on morphological evidence and comparative rbcL sequences[J]. Journal of Oceanology and Limnology, 2016, 34(2): 283-294

Grateloupia ramosa Wang & Luan sp. nov.(Halymeniaceae, Rhodophyta), a new species from China based on morphological evidence and comparative rbcL sequences

CAO Cuicui¹, LIU Miao¹, GUO Shaoru¹, ZHAO Dan¹, LUAN Rixiao², WANG Hongwei¹

1 College of Life Sciences, Liaoning Normal University, Dalian 116081, China;
2 Dalian Natural History Museum, Dalian 116023, China

Abstract:

Grateloupia ramosa Wang & Luan sp. nov.(Halymeniaceae, Rhodophyta) is newly described from Hainan Province, southern China. The organism has the following morphological features:(1) purplish red, cartilaginous and lubricous thalli 5-10 cm in height;(2) compressed percurrent axes bearing abundant branches with opposite arrangement;(3) claw-like apices on top, constricted to 2-4 cm at the base;(4) cortex consisting of 3-6 layers of elliptical or anomalous cells and a medulla covered by compact medullary filaments;(5) reproductive structures distributed throughout the thallus, especially centralized at the bottom of the end portion of the branches; and(6) 4-celled Carpogonial branches and 3-celled auxiliary-cell branches, both of the Grateloupia-type. The morphological differences were supported by molecular phylogenetics based on ribulose-1, 5-bisphosphate carboxylase/oxygenase(rbcL) gene sequence analysis. There was only a 1 bp divergence between specimens collected from Wenchang and Lingshui of Hainan province. The new species was embedded in the large Grateloupia clade of the Halymeniaceae. The pairwise distances between G. ramosa and other species within Grateloupia ranged from 26 to 105 bp, within pairwise distances of 13-111 bp between species of the large genus Grateloupia in Halymeniaceae. Thus, we propose this new species as G. ramosa Wang & Luan sp. nov.

Received: 2014-11-24 Revised: 2015-02-16

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