A FURTHER SEM STUDY OF MARINE BENTHIC DINOFLAGELLATES FROM A MANGROVE ISLAND, TWIN CAYS, BELIZE, INCLUDING PLAGIODINIUM-BELIZEANUM GEN ET SP-NOV
A FURTHER SEM STUDY OF MARINE BENTHIC DINOFLAGELLATES FROM A MANGROVE ISLAND, TWIN CAYS, BELIZE, INCLUDING PLAGIODINIUM-BELIZEANUM GEN ET SP-NOV
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DOI：
10.1111/j.0022-3646.1993.00826.x
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发表时间：
1993-12-01
影响因子：
2.9
通讯作者：
BALECH, E
中科院分区：
文献类型：
--
作者：
FAUST, MA;BALECH, E
这项研究表明，双侧扁平，装甲，底栖鞭毛藻在形态上比以前所知的更多样化。在伯利兹双礁红树林的浮质碎屑中发现了一新种——Plagiodinium belizeanum Faust et Balech gen. et sp. nov.。Plagiodinium belizeanum细胞很小，长度为26.5-30.5 mum，宽度为20-24.5 mum，深度为6.5-8.5 mum。细胞呈椭圆形，两侧被压缩，细胞核位于后方，有许多叶绿体和球形淀粉颗粒。上皮腹侧下降，呈帽状，由五个板和位于中心的一个暂时命名为P(o)的非常小的血小板组成。上皮顶端呈窄椭圆形，腹侧尖形截形，背侧圆形。带子带由五个板块组成。下鞘由5个后拉长的钩后板和1个前尖板构成。沟很短很窄，由五个小板组成。P. belizeanum的膜板排列为P(o)、5′、0′、5C、5′、1''‘’、5C。没有列表。膜板表面光滑，有小而不规则的分散孔。鞘间带在细胞外表面光滑，在细胞内表面有宽条纹。我们认为，P. belizeanum代表了一个新的底栖、甲壳纲的底栖属，Plagiodinium gen. 11 .。P. belizeanum sp. 11 .的分类地位与相关的沙栖和双侧扁平底栖鞭毛虫进行了比较。
This study indicates that bilaterally flattened, armored, benthic dinoflagellates are more diverse in morphology than previously known. A new species, Plagiodinium belizeanum Faust et Balech gen. et sp. nov., is described in floating detritus from Twin Cays, Belize, mangrove habitats. Plagiodinium belizeanum cells are small, with dimensions of 26.5-30.5 mum in length, 20-24.5 mum in width, and 6.5-8.5 mum in depth. Cells are oblong and bilaterally compressed with a posteriorly located, spherical nucleus, many chloroplasts, and spherical starch granules. The epitheca descends ventrally, is cap-shaped, and is composed of five plates and a very small platelet provisionally named P(o) situated in the center. The epitheca is narrowly oval in apical view with a pointed truncated ventral side and a rounded dorsal side. The cingulum is composed of five plates. The hypotheca is constructed of five posteriorly elongated postcingular plates and one antapical plate. The sulcus is very short and narrow, comprised of five small plates. The thecal plate arrangement of P. belizeanum is P(o), 5', O'', 5C, 5''', 1'''', 5C. No lists are present. Thecal plates have a smooth surface with small and irregularly scattered pores. The intercalary band is smooth on the outer cell surface and broadly striated on its inner surface. We conclude that P. belizeanum represents a new, benthic, peridinioid, armored genus, Plagiodinium gen. nov. The taxonomic position of P. belizeanum sp. nov. is compared to related sand-dwelling and bilaterally flattened benthic dinoflagellates.