A Molecular Assessment Of The Genus Sinotubimorpha W.X.Li Et Z.F.Ding (halymeniaceae, Rhodophyta)

According to the Chinese plant, identified as Grateloupia porraeca(Mert.)W.X.Li et Z.F.Ding, Li et al (1998) established a new genus Sinotubimorpha W.X.Li et Z.F.Ding which is descriped detaily in "China algae Chi "now. There are five speices in this genus and distribute in Qingdao, Beidaihe, Guangdong province of China. Since its establishment, scholars have been especially concerned on the relationship between it and the genus Grateloupia which is also belonged to the family Halymeniacea.This experiment also focuses on the research of these problems.On the basis of the comparition of morphological characters and rbcL molecular systematic analysis of the species entities which were collected in Dandong, Qingdao, Hainan, Beidaihe and Laolongtou, we find the following conclusions:1. Conduct a comprehensive analysis on the relationship between Sinotubimorpha W.X.Li et Z.F.Ding and Grateloupia C.Agardh.Make a morphological and molecular systematic research (rbcL sequences) on the Chinese entities of this genus. Make a conclusion that all the species sharing the same gene sequence of this genus as same as Grateloupia catenata and suggest it as the synonym name of the genus Grateloupia.2. Fing some entities of the genus Sinotubimorpha which are collected in Hainan are not belonged to this genus but a new species of the genus Grateloupia.We named it Grateloupia ramaosa Wang et Luan sp.nov.and make a detailed study and description on its anatomical characteristics, particularly the reproductive characteristics.3. Find Grateloupia orientalis S.-M. Lin et H.-Y.Liang sp.nov which is original in Taiwan but now in Hainan during our experiment as a new record in China, although the external morphology of this species are similar to Sinotubimorpha algae, in particular the hollow axis and the same auxiliary cell ampulla type.