年間 4 号発行
ISSN 印刷: 1521-9429
ISSN オンライン: 1940-4328
Indexed in
Valve ultrastructure of new and rare fossil freshwater species of Thalassiosira Cl. (Bacillariophyta) from China and USA
要約
Three small new species of the genus Thalassiosira Cl. (T. yunnaniana Khursevich & Kocioiek, T. bradburyi Khwsevieh & Kocioiek and T. iraidae Khursevich & Kocioiek) studied in light and scanning electron microscope are described from the Miocene freshwater deposits in Yunnan Province, China. All studied species have internal flat cribra covering individual loculate areolae on the valve surface. Moreover, an expanded diagnosis of T. kilarskii Kaczmarska known from the Miocene diatomites of western USA is also presented. Unlike the Chinese species, T. kilarskii has areolae with internal radial zigzag paths of continuous cribra. Also, the presence of valve face faltoportulae is reported in this species, a characteristic described as lacking in the original description.
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Prasad Akshinthala K. S. K., Nienow James A., Hargraves Paul, Plicate Species of the Diatom GenusThalassiosira(Bacillariophyta) from the Atlantic and Gulf Coasts of Southeastern United States, with the Description ofT. livingstoniorumsp. nov., Proceedings of the Academy of Natural Sciences of Philadelphia, 161, 1, 2011. Crossref
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Stachura-Suchoples Katarzyna, Williams David M., Description ofConticribra tricircularis, a new genus and species of Thalassiosirales, with a discussion on its relationship to other continuous cribra species ofThalassiosiraCleve (Bacillariophyta) and its freshwater origin, European Journal of Phycology, 44, 4, 2009. Crossref