中国拟鸡冠菜属的一个新种  

A NEW SPECIES OF MERISTIELLA (RHODOPHYTA, SOLIERIACEAE) FROM CHINA

作　　者：匡梅[1] 夏邦美[1] 

机构地区：[1]中国科学院海洋研究所,青岛266071

出　　处：《海洋与湖沼》2003年第4期431-435,共5页Oceanologia Et Limnologia Sinica

基　　金：中国科学院重大项目资助;3 81 80 0号。

摘　　要：对1958年4月采自西沙群岛永兴岛的红翎菜科麒麟菜族标本AST 5 8 41 95号、AST5 8 41 5 4A号和AST 5 8 41 5 8号进行切片与染色的分类研究。将其与该科中相近的麒麟菜属、琼枝藻属和卡帕藻属的不同种一起,进行了营养体的外部形态和内部构造,尤其是囊果的形态与切面特征的详细比较、研究和鉴定。结果表明,这些标本是我国目前尚未报道的红翎菜科拟鸡冠菜属的一个新种:具花拟鸡冠菜Meristiella florigia sp nov 。A new species of the genus Meristiella, Meristiella florigia Kuang et Xia, is described from specimens collected in Yongxing Island, the Xisha (Paracel) Islands in the South China Sea. The distinguishing feature of the new species is associated with the structure of the cystocarp, which differs from cystocarps of Betaphycus gelatinum and Eucheuma arnoldii, as well as Kappaphycus by showing a central, small-celled placenta rather than a large fusion cell. Additionally, loosely clustered gonimoblast filaments extend radially from the placenta, and are not enclosed in gel-like cavities as shown in Eucheuma and Betaphycus. This new species can be distinguished from M. gelidium, the type species of this genus by the following characters: cylindrical to some what compressed thallus, with irregular branches, smooth when young, the surface becoming surrounded by some protuberances and spines when maturing; cystocarps formed on main axes. Thallus in transverse section having 2 layers of cortical cells, medulla composed of pseudoparenchymatous cells gradually enlarging from outer to center layers, small and large cells mixed in the cylindrical axes. Diagnosis of the new species: Meristiella florigia sp. nov. (Fig.1, Fig.2). Thallus cylindrical to somewhat compressed, irregularly branching, surrounded by some protuberances and spines; cystocarps hemi-spherical, on main axes; younger branches, rather smooth, issuing from the old part of the frond. Mature cystocarp like flower, protubering from the center of the flower, dark purplish red in color; composed of a central, small-celled placentum rather than a large fusion cell. Packets of outwardly radiating carposporangia surrounding the central placentum. Pericarp thin, issuing inwardly traversing filaments. Tetrasporangia and spermatangia unknown.

关 键 词：中国 拟鸡冠菜属 囊果 形态 切面特征 红翎菜科 具花拟鸡冠菜 品种 

分 类 号：Q949.293.4[生物学—植物学]