158,889 species and infraspecific names are in the database, 22,385 images, 61,555 bibliographic items, 457,092 distributional records.

Hamatusia Stidolph, 1993

Holotype species: Hamatusia reediana (Stidolph) Stidolph

Original publication and holotype designation: Stidolph, S.R. (1993). Hamatusia nom. nov., a new generic name for the diatom Amphiprora reediana Stidolph. Diatom Research 8(2): 481-482, no figs.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Harper, M.A., Cassie Cooper, V., Chang, F.H., Nelson, W.A. & Broady, P.A. (2012). Phylum Ochrophyta: brown and golden-brown algae, diatoms, silicioflagellates, and kin. In: New Zealand inventory of biodiversity. Volume Three. Kingdoms Bacteria, Protozoa, Chromista, Plantae, Fungi. (Gordon, D.P. Eds), pp. 114-163. Christchurch: Canterbury University Press.

Nomenclatural notes
Etymology: "Hamatus - of Lath derivation meaning 'provided with hooks'." - (1 Dec 2015) - M.D. Guiry

Description: Cells solitary. Frustules asymmetrical, valve face elliptical, with large elevated, raphe-bearing keels projected as hooks to full length of valves and offset to same side of frustule, hooks opposed on other side of valve by a conspicuous longitudinal dome; cingulum narrow. Valves symmetrical, narrowly elliptical with subacute apices; a robust elliptical dome that gradually tapers from the central area towards the apices is situated along the apical axis; keels eccentric, submarginal and formed into conspicuous hooks with the dorsal edge rising abruptly from the central raphe area and terminating in a high arch in line with girdle zone apices. The ventral keel surface merges into the valve face approximately two-thirds distance from the central raphe area to the apices. This marine and estuarine taxon was collected at Merton and in the Waikouaiti River estuary, South Island, New Zealand.

Information contributed by: M.C. Amspoker. The most recent alteration to this page was made on 1 Dec 2015 by M.D. Guiry.

Comments: Original description: "Frustule asymmetical. valve face elliptical, with large elevated, raphe-bearing keels projected as hooks to full length of valves and offset to same side of frustule. hooks opposed on other side of valve face by a conspicuous longitudinal dome."

Numbers of names and species: There is only one species or infraspecific name in the database at present, which 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 April 2003 by M.D. Guiry

Verified by: 01 December 2015 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=45606

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 14 August 2020.

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