Caloneis Cleve, 1894: 46

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Bacillariophyceae
Subclass Bacillariophycidae
Superorder Bacillarianae
Order Naviculales
Family Naviculaceae

Lectotype species: Caloneis amphisbaena (Bory de Saint Vincent) Cleve

Original publication:Cleve, P.T. (1894). Synopsis of the naviculoid diatoms. Part I. Kongliga Svenska Vetenskapsakademiens Handlingar, series 4 26(2): 1-194, 5 pl.
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Type designated inBoyer, C.S. (1927). Synopsis of North American diatomaceae, Supplement, Part 2.- Naviculatae, Surirellatae. Proceedings of the Academy of Natural Sciences of Philadelphia 79: 229-583.
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Taxonomic status: currently recognized as a distinct genus.

Description: Cells solitary, naviculoid. Valves usually linear-lanceolate to elliptical, sometimes with capitate or rostrate poles and sometimes with undulate margins. Valve face flat or curving smoothly into relatively deep mantles. Axial and central areas variable in shape. Terminal fissures of the raphe are usually distinct. Striae basically multiseriate but usually also chambered. The outer wall of the chambers (alveoli) perforated by many rows of small, round poroids occluded by hymenes. The poroids are usually invisible in the light microscope. The inner wall of each alveolus typically opens to the inside of the valve by one fairly large, transapically elongate aperature. The inner aperatures usually located in approximately the same place on each alvelus, thus giving the appearance of one or several longitudinal lines crossing the striae on both sides of the axial area. The girdle consists of a few open bands. Caloneis has been reported from fresh, brackish and marine waters. Because the structure of Caloneis is so similar to that of Pinnularia, some researchers (e. g., Round and others, 1990) have included Caloneis within Pinnularia. Traditionally, the genera have been separated by the shape of their alveoli. The alveoli of Caloneis are usually thinner and denser than those of Pinnularia.

NCBI Nucleotide Sequences

Numbers of names and species: There are 304 species (and infraspecific) names in the database at present, of which 85 have been flagged as currently accepted taxonomically.

Names: ('C' indicates a name that is currently 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):

References
Kociolek, J.P. & Spaulding, S.A. (2003). Symmetrical Naviculoid Diatoms. In: Freshwater Algae of North America, Ecology and Classification. (Wehr, J.D. & Sheath, R.G. Eds), pp. 637-654. San Diego: Academic Press.

Contributors
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.

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43729

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 May 2013.

Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:77681