Trichidium J.M.Noble & Kraft, 1984

Holotype species: Trichidium pedicellatum J.M.Noble & Kraft

Original publication and holotype designation: Noble, J.M. & Kraft, G.T. (1983). Three new species of parasitic red algae (Rhodophyta) from Australia: Holmsella australis sp. nov., Meridiocolax bracteata sp. nov. and Trichidium pedicellatum gen. et sp. nov.. British Phycological Journal 18: 391-413, 42 figs.

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Description: Very small parasite or hemiparisite on Lophocladia harveyi. Vegetative thallus hemispherical, pulvinate, on surface of host, with penetrating rhizoids that form connections with host cells. Fertile cushions have radiating clusters of upright cylindrical axes, polysiphonous and with a trichoblast or scar cell on each segment, arranged in a spiral series. Trichoblasts deciduous unless bearing reproductive structure. Female branchlets have many distal procarps borne on epibasal cell of trichoblast, remaining monosiphonous until cystocarp matures. Supporting cell bears a 4-celled carpogonial branch a 1 sterile group of 3-4 cells. Pericarp spheroid to ovoid, ostiolate, several produced on in series on fertile branchlet. Male capitula replace trichoblasts, lanceolate and sometimes branched; sterile apical cell usually present. Tetrasporangial branches unusual in that several are borne on a trichoblast, each having a monosiphonous base; 1 sporangium in each segment, their large size causing displacement within sporangial row.

Information contributed by: R.E. Norris. The most recent alteration to this page was made on 2010-10-07 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Comments: Known only from type locality: pilings of town jetty, Port Denison, Western 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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42760

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 October 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024