Nitzschia pseudosinuata sp nov., a new holocene diatom from the sediment of Moon Lake, North Dakota, USA

Citation
Pb. Hamilton et Kr. Laird, Nitzschia pseudosinuata sp nov., a new holocene diatom from the sediment of Moon Lake, North Dakota, USA, DIATOM RES, 16(2), 2001, pp. 317-324
Citations number
17
Categorie Soggetti
Aquatic Sciences
Journal title
DIATOM RESEARCH
ISSN journal
0269249X → ACNP
Volume
16
Issue
2
Year of publication
2001
Pages
317 - 324
Database
ISI
SICI code
0269-249X(200111)16:2<317:NPSNAN>2.0.ZU;2-J
Abstract
Nitzschia pseudosinuata Hamilton & Laird sp. nov. is described from the sed iments of Moon Lake, North Dakota, U.S.A. The new species is a small (lengt h <20 <mu>m), weakly silicified, tabelloid diatom observed in the sediments from 1840 to 2220 yr BP. A modem analogue, Nitzschia sinuata var. tabellar ia (Grunow) Grunow, is superficially similar, but exhibits significant diff erences in fibular and canal raphe construction as well as in the density o f striae and fibulae. In addition, according to conventional systematic con siderations, these similar taxa belong to two different subgeneric groups ( Sections Lanceolatae and Grunowia, respectively). Based on co-occurences wi th Cyclotella quillensis Bailey and Chactoceros sp. [cf. muellerial elmorei (resting spores)], it appears that N. pseudosinuata is a mesohaline specie s indicative of shallow saline waters of the past.