Campylostylus Shadbolt ex van Heurck, 1896

Holotype species: Campylostylus normanianus (Greville) Gerloff, Natour & P.Rivera

Original publication and holotype designation: Van Heurck, H. (1896). A treatise on the Diatomaceae. Translated by W.E. Baxter. pp. 1-558, pls 1-35. London: William Wesley & Son.

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Description: Frustules forming fan-like colonies attached at their basal ends. Valves long, thin, asymmetrical arcuate with a narrow basal pole and an enlarged, broadly rounded head pole which may be constricted into a narrow beak; heterovalvar with respect to the presence of the rimoportula in the basal pole, rimoportulae always present in both valves at the head pole. Axial area narrow, running near the middle of the valve in the lower part of the cell, becoming displaced towards the ventral side in the upper third of the valve. Striae fine, radiate at the apices. Apical pore field absent at the basal ends, although a single enlarged pore is present which may represent the remnant of such a field. Cingulum composed of a valvocopula and 2 pleurae, a reduced internal septum attached to valvar side of valvocopula at head pole. Valvocopulae with slits parallel to the pervalvar axis, the successive pleurae with 2 rows of poroids. The valvocopula and second pleura open at basal pole, the first pleura opens at head pole. This type species was originally described a C. striatus Shadbolt (Van heurck, 1896), but has more recently been placed in C. normanianus (Grev.) Gerloff (Gerloff and others 1978) because of the earlier description of the taxon as Synedra normaniana Greville (1862). Light and electron micrographs of Campylostylus were presented by Wahrer and others (1985) who recommended that the taxon be transferred to Licmophora normaniana (grev.) Wahrer on the bases of similar colony formation, heterovalvy with respect to the basal pole, and reduced internal septa on the girdle bands. This genus is typically found in inland and coastal brackish waters in desert and tropical regions (Ehrlich, 1975, Rushforth and Johansen 1979, Van Heurck 1896).

Information contributed by: J. Johansen. The most recent alteration to this page was made on 2023-02-22 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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: https://www.algaebase.org/search/genus/detail/?genus_id=46725

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 22 February 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 March 2024

 
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