REINSTATEMENT OF THE DIATOM GENUS SPATANGIDIUM (BACILLARIOPHYTA) - THE TYPE SPECIES S-ARACHNE

被引：5
|
作者：
HERNANDEZBECERRIL, DU [1 ]
机构：
[1] UNIV BRISTOL,DEPT BOT,BRISTOL BS8 1UG,AVON,ENGLAND
来源：
PHYCOLOGIA | 1992年 / 31卷 / 3-4期
关键词：
D O I：
10.2216/i0031-8884-31-3-4-278.1
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Light and scanning electron microscopic observations on the diatom Spatangidium arachne Brebisson (Bacillariophyta) provide information on which the two closely related genera Asteromphalus Ehrenberg and Spatangidum Brebisson can be differentiated. The presence of 1-3 rimoportulae near the central portion of the valve, and an areolae pattem consisting of circles of slightly sunken poroids and surrounded by hyaline areas, are considered sufficient evidence to warrant separation of Spatangidium from Asteromphalus. Spatangidium arachne shows great variability in shape, size and development of ray holes and rimoportulae. The taxonomy and distribution of S. arachne is described and an emended description of the genus Spatangidium is given. A possible relationship between S. arachne and two poorly known species of Asteromphalus is suggested.
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页码：278 / 284
页数：7
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