期刊
DIATOM RESEARCH
卷 28, 期 1, 页码 37-59出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/0269249X.2012.734531
关键词
diatoms; frustule ultrastructure; Nitzschia; Nitzschia frustulum; Nitzschia inconspicua; Nitzschia invisitata; Nitzschia soratensis; taxonomy; type material
资金
- SYNTHESYS
- European Community
- EDIT WP2
- EU
The taxonomy of several small-celled, ecologically significant Nitzschia species, which are frequently confused with each other or whose names are misapplied, is clarified. Following an examination of type material and modern samples by light and electron microscopy, it was concluded that N. frustulum (Kutzing) Grunow, N. inconspicua Grunow, N. soratensis E. Morales & Vis and N. invisitata Hustedt are independent species. No morphological basis was found for separating N. frustulum var. subsalina Hustedt or N. boliviana E. Morales & Vis from N. inconspicua and they are therefore placed in synonymy with N. inconspicua. Nitzschia soratensis, described recently from Bolivia, has previously been misidentified in Europe, either as N. inconspicua (from which it differs most obviously in having more bluntly rounded poles, striae within the raphe canal that are composed of triplets, and fibulae that can be seen in light microscopy to widen at their bases) or as N. abbreviata Hustedt ex Simonsen (from which it differs in pore ultrastructure). Nitzschia frustulum resembles N. inconspicua in every morphological feature examined, but with wider valves and consistently higher maximum length.
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