Claviclonium Kraft & Min-Thein, 1983

Holotype species: Claviclonium ovatum (J.V.Lamouroux) Kraft & Min-Thein

Original publication and holotype designation: Kraft, G.T. & Min-Thein, U. (1983). Claviclonium and Antrocentrum, two new genera of Acrotylaceae (Gigartinales, Rhodophyta) from southern Australia. Phycologia 22: 171-183, 35 figs.

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Description: Plants reach 30 cm in length, are epilithic, erect from a discoid holdfast, and consist of cartilaginous axes bearing varying numbers of cylindrical to once-constricted clavate branches. Most of the diameters of both axes and laterals is composed of filamentous medulla, the filaments being much more densely aggregated in the former. The cortex of the clavate laterals is shallow, with cells of the inner layers not being abruptly larger than those of subtending layers. Supporting cells are monocarpogonial, bear 3-celled carpogonial branches, and occur in sori at the apices of determinate laterals. Gonimoblasts develop inwardly and line a cavity bordered by nutritive filaments. Cystocarps are wholly embedded. Carposporangia form terminally and singly and escape through an ostiole formed by local breakdown of the cortex. Spermatangia are not known. Tetrasporangia are laterally attached to bearing cells, and dispersed across the outer cortex of the lateral branches (Kraft and Min-Thein, 1983).

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 2021-06-18 by M.D. Guiry.

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

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Kraft, G.T. & Saunders, G.W. (2021). The Acrotylaceae (Gigartinales) revisited: molecular data indicate family-level differences in one of the most enigmatic red-algal families. Australian Systematic Botany 34(3): 305-326, 13 figs, 1 table.

Comments: Distribution: Plants are recorded from 5-20 m depths, usually growing on limestone. The genus is virtually endemic to the state of Western Australia from the Geraldton region in the north to just across the south Australian border in the east.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=39893

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 18 June 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 March 2024

 
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