Title
**Cavernosa kapitiana** (Bacillariophyceae): biogeography and morphology of the different life cycle stages **Cavernosa kapitiana** (Bacillariophyceae): biogeography and morphology of the different life cycle stages
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Wellington ,
Subject
Biology
Source (journal)
New Zealand journal of botany. - Wellington
Volume/pages
49(2011) :4 , p. 443-459
ISSN
0028-825X
ISI
000300170300002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
The monospecific diatom genus Cavernosa is known from only two locations: Kapiti Island off the west coast of New Zealand and Ile de la Possession, Crozet Archipelago, in the southern Indian Ocean. Cavernosa kapitiana Stidolph is a chain-forming diatom with cylindrical frustules having an elongated valve mantle. We provide a description of the different life-cycle stages (normal frustules, globular initial cells, bell-shaped initial cells, first daughter cells of initial cells) of C. kapitiana based on examination of new material from Ile de la Possession and material from the type locality on Kapiti Island. The most remarkable morphological features include the complex valve face structure composed of pores, granules and ridges, the subdivision of the valve interior into marginal caverns, the complex structure of the mantle and girdle, and the presence and morphology of rimoportulae. The study concludes with an emended species description of C. kapitiana.
E-info
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