西沙群岛甲藻的研究——Ⅲ.几种罕见的热带大洋性甲藻

STUDIES ON THE DINOFLAGELLATA IN ADJACENT WATERS OF THE XISHA ISLANDS Ⅲ. SOME RARE TROPICAL OCEAN SPECIES

于1974年12月—1975年1月,在西沙群岛附近(15°16′—17°05′N,111°11′—113°44′E)采到热带大洋性罕见甲藻七种和一变种:Gonyaulax fusiformis Graham, Gonyaulaxmitra(Sch(?)tt)KofOid,Heterodinium globosum Kofoid,Ceratium digitatum sch(?)tt, Ceratiumdigitatum v.rotundatum J(?)rgensen, Ceratium limulus Gourret, Ostreopsis siamensis Schmidt,Gambierdiscus toxicus Rukuro & Yasuwo。七个种和一个变种以及其中两个属Ostreopsis Schmi-dt, Gambierdiscus Rukuro & Yasuwo均为我国新记录。

Samples of Dinoflagellates collected during December 1974 to January 1975 from Xisha Islands of South China Sea, of which two genus and eight taxa were identified as new records for China, are discussed in the present work. Two genus are Ostreopsis Schmidt and Gambler-discus Rukuro & Yasuwo, eight taxa are Gonyavlax fusiformis Graham, G. tnitra (Schutt) Ko-foid, Heteradinium globosum Kofoid, Ceratium digilatum Schutt, C. digitatum v. rotundalum Jorgensen, C. limulus Gourret, Ostreopsis siamensis Schmidt, Gambierdiscus toxicus Rukuro & Yasuwo. Most of them are tropical ocean rare species.