Department of Zoology, British Museum (Natural History), London, U.K.
Eur J Protistol. 1989 Oct 27;25(2):109-28. doi: 10.1016/S0932-4739(89)80022-7. Epub 2012 Jan 30.
A critical examination of the biology and morphology of two species of Cucurbitella, six species of Difflugia and three species of Netzelia is presented. A new term 'necklace' is given to species of Difflugia which have an apertural rim, but lack a distinct collar like those of Cucurbitella. Details of the shell surface composition is used to differentiate some species, and a knowledge of the general biology assists the interpretation of these results. Biometrical data is also shown to be useful in separating morphologically similar species. Cytoplasmic features such as the size and structure of the nucleus and nucleolus is used to further distinguish species. As a consequence of our investigation one new species is erected and several synonyms proposed.
对两种 Cucurbitella、六种 Difflugia 和三种 Netzelia 的生物学和形态学进行了批判性研究。对于具有口缘但缺乏像 Cucurbitella 那样明显颈环的 Difflugia 物种，给出了一个新术语“项链”。壳面组成的细节用于区分一些物种，而对一般生物学的了解有助于解释这些结果。生物计量数据也被证明有助于分离形态相似的物种。细胞质特征，如核和核仁的大小和结构，也被用来进一步区分物种。作为我们研究的结果，一个新种被建立，并且提出了几个同义词。
