西沙群岛网地藻科的研究

西沙群岛的网地藻科。迄今只见樊恭炬等在“金银岛及其附近几个岛礁的海藻名录”一文中报道5种,该文中的暗黑圈扇藻 Zonaria nigrescens Sonder实际上是匍扇藻 Lobophora variegate (Lamx.) Womersley的同物异名,应予撤销。因此,有效记录只是4种,即:叉开网地藻 Dictyota divaricata Lamx,脆弱网地藻 Dictyota friabilis Setch,南方团扇藻 Padina australis Hauck 和匍扇藻。 我们研究了中国科学院海洋研究所1957-1980年先后五次对西沙群岛进行海洋植物区系调查时采得的大量网地藻科标本,在本文报道12种其中有一个新种:西沙团扇藻 Padina xishaensis sp.nov,七种新记录:匍匐网翼藻 Dictyopteris repens (Okam.) Boerg.，鹿角网地藻 Dictyota cervicornis Kuetz.,刺叉网地藻 D. patens J.Ag,波利团扇藻 Padina boryana Thivy.,小团扇藻 P. minor Yamada,琼斯团扇藻 P. jonesii Tsuda和棕叶藻 Stypopodium zonale (Lamx.) Papenfuss。其中鹿角网地藻、琼氏团扇藻和棕叶藻是中国新记录。 研究用的标本,包括新种的模式标本都存于中国科学院海洋研究所植物标本室。

STUDIES ON THE DICTYOTACEAE OF THE XISHA ISLANDS, SOUTH CHINA SEA

So far, four species of Dictyotaceae have already been reported from the Xisha Islands,South China Sea, Zonaria nigrescens Sonder and Lobophora variegate (Lamx.) Womersley reported previously being synonymous with each other. The four species are Dictyota divaricata Lamx, D. friabilis Setchell, Padina australis Hauck and Lobophora variegata (Lamx.) Womersley. In the present paper, 12 species are reported, of which eight species are newly added to the flora of the Xisha, including one new species, namely, Padina xishaensis sp.nov. The other seven species are Dictyopteris repens (Okam. ) Boerg., Dictyota cervicornis Kuetz., D. patens J. Ag, Padina boryana Thivy, P. minor Yamada, P. jonesii Tsuda, Stypopodium zonale (Lamx ) Papenfuss. Among them, D. cervicornis, P. jonesii and S. zonale are recorded for the first time from China. These species are fully described on the basis of our own materials to facilitate better understanding of these seaweeds. The specimens studied including the type specimen are all deposited in the Herbarium of the Institute of Oceanology,Academia Sinica in Qingdao.