Trithamnion Wollaston, 1968

Holotype species: Trithamnion gracilissimum Wollaston

Original publication and holotype designation: Wollaston, E.M. (1968). Morphology and taxonomy of southern Australian genera of Crouanieae Schmitz (Ceramiaceae, Rhodophyta). Australian Journal of Botany 16: 217-417, 42 figs, 10 pls, 1 table.

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Description: Thallus prostrate and erect, small to several cm, irregularly branched, axes with 3(-5) unilaterally placed determinate branchlets, usually with one distinctly longer and bearing pairs of short branches and gland cells. Hairs often present in pairs on short stalk cells. Procarps on short 2-celled branchlets below apices with 4-celled carpogonial branch on basal (supporting) cell. Auxiliary cell, cut off from supporting cell, giving rise to carposporophyte with rounded groups of carposporangia, surrounded by several long branchlets. Spermatangia not recorded. Tetrasporangia on cells of short determinate branchlets, tetrahedrally divided. Well-defined by unilateral whorls of branchlets.

Information contributed by: E.M. Wollaston. The most recent alteration to this page was made on 2010-10-06 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Athanasiadis, A. (1996). Morphology and classification of the Ceramioideae (Rhodophyta) based on phylogenetic principles. Opera Botanica 128: [1]-216, 108 figs.

Comments: Known only from southern Australia.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=34681

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 October 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 02 January 2025