161,464 species and infraspecific names are in the database, 22,723 images, 62,896 bibliographic items, 473,550 distributional records.

Kittonia Grove & Sturt, 1887

Empire Eukaryota
Kingdom Chromista
Phylum Bacillariophyta
Subphylum Bacillariophytina
Class Mediophyceae
Subclass Biddulphiophycidae
Order Biddulphiales
Family Kittoniaceae

Lectotype species: Kittonia elaborata (Grove & Sturt) Grove & Sturt

Original publication:Grove, E. & Sturt, G. (1887). On a fossil marine Diatomaceous deposit from Oamaru, Otago, New Zealand. Part III. Journal of the Quekett Microscopical Club, Series 2 3: 63-78, pls 5, 6.

Type designated in Lefébure, P. & Chenevière, E. (1939). Description et iconographie de Diatomées rares ou nouvelles. II.. Bulletin de la Société Française de Microscopie 8(1): 21-25, 1 plate.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Nikolaev, V.A., Kociolek, J.P., Fourtanier, E., Barron, J.A. & Harwood, D.M. (2001). Late Cretaceous diatoms (Bacillariophyceae) from the Marca Shale member of the Moreno Formation, California. Occasional Papers of the California Academy of Sciences 152: [1]-119, 39 pls.

This is a genus of fossil species, or a genus with a fossil type species, or a genus the type species of which was originally described as a fossil.

Description: Cells elliptical in valve view with two conspicuous processes ending in flattened swellings. A fossil genus of nine species (VanLandingham, 1971) but requiring re-investigation. Prominent in the Eocene Oamaru deposit of New Zealand. Valves elliptical, shallow, with a prominent marginal flange and two (in some species three) extended processes. These arise from clear areas of the valve face about half-way between centre and margin; the axis on which they lie is at approximately 45° to the apical and transapical axes of the valve. The processes are at first plain, tubular and bent outwards, but end in flattened swellings, lying parallel to the valve, perforated by rows of fine pores forming a type of 'ocellus'. A clear central area is present bearing a cluster of short tubes externally (the openings of the rimoportulae). Surrounding this central area the valve rises and then falls and rises again to the marginal flange. Rows of large areolae radiate from the centre, the areolae containing fine cribra. Internally the framework is conspicuously ribbed between the uniseriate rows of areolae. Fine slits/pores occur on the ribs both on the tops and sides; these open to the outside through the simple pores. A narrow valve mantle extends beneath the marginal flange and is provided with a row of areolae. The mantle extends beneath the row of areolae and in this region is finely perforate. Rimoportulae clustered, central, with tubular extensions externally, but sessile internally and lying in a slight depression. Small pores occur around and between the rimoportulae. We have no data on the cingulum.

The most recent alteration to this page was made on 7 Dec 2015 by M.D. Guiry.

Comments: Kittonia is one of the most striking of diatoms. Its classification in the 'biddulphioid' section is based on the assumption that the pores at the apices of the processes form ocelli. The strucure of the vela is very much like that in Biddulphia.

Numbers of names and species: There are 15 species names in the database at present, of which 1 has been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

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Verification of data
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Created: 16 September 2003 by M.D. Guiry

Verified by: 07 December 2015 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=46630

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Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 14 May 2021.

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