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Cavernosa kapitiana (Bacillariophyceae): biogeography and morphology of the different life cycle stages
Cremer, H.; de Haan, M.; Van de Vijver, B. (2011). Cavernosa kapitiana (Bacillariophyceae): biogeography and morphology of the different life cycle stages. N.Z. J. Bot. 49(4): 443-459. hdl.handle.net/10.1080/0028825X.2011.580767
In: New Zealand journal of botany. Dept. of Scientific and Industrial Research: Wellington, N.Z.; . ISSN 0028-825X; e-ISSN 1175-8643
Peer reviewed article  

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Trefwoorden
    Bacillariophyceae [WoRMS]; Cavernosa kapitiana S.R.Stidolph, 1990 [WoRMS]
    Marien
Author keywords
    biogeography, Cavernosa kapitiana , diatoms, ecology, life cycle, morphology, New Zealand, subantarctica, taxonomy

Auteurs  Top 
  • Cremer, H.
  • de Haan, M.
  • Van de Vijver, B.

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.

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