ELLIPTICAL SPECIES OF THE FRESHWATER GENUS AULACOSEIRA IN MIOCENE SEDIMENTS FROM YAMATO RISE (SEA OF JAPAN)

Elliptical valves of diatoms of the genus Aulacoseira Thwaites from Miocene deposits of different elevations of the underwater Yamato Rise were studied with light and scanning electron microscopy. Peculiar characteristics of areolar density, shapes of spines and rimoportulae and their location were...

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Bibliographic Details
Published in:Diatom research 2010-11, Vol.25 (2), p.397-415
Main Authors: Usoltseva, Marina V., Tsoy, Ira B.
Format: Article
Language:English
Subjects:
Aulacoseira
Aulacoseira elliptica
Aulacoseira ovata
Bacillariophyceae
elliptical Aulacoseira
Miocene
Takuyo Bank
the Sea of Japan
Yamato Bank
Yamato Rise
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Summary:Elliptical valves of diatoms of the genus Aulacoseira Thwaites from Miocene deposits of different elevations of the underwater Yamato Rise were studied with light and scanning electron microscopy. Peculiar characteristics of areolar density, shapes of spines and rimoportulae and their location were shown. A new species A. ovata Usoltseva & Tsoy sp. nov. from sediments of the northeastern slope of Takuyo Bank was described. An extended description of Aulacoseira elliptica Tsoy emend. Usoltseva from sediments of the southern elevation Yamato was given.
ISSN:0269-249X
2159-8347
DOI:10.1080/0269249X.2010.9705859