Chlorojackia R. Nielsen et J. A. Correa, 1988

Holotype species: Chlorojackia pachyclados R.Nielsen & J.A.Correa

Original publication: Nielsen, R. & Correa, J. (1988 '1987'). A comparative study of Gomontia polyrhiza and Chlorojackia pachyclados gen. et sp. nov. (Chlorophyta). Canadian Journal of Botany 65: 2467-2472.

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Description: Heteromorphic life history with alternation of multi- and unicellular stages. The small multicellular thalli have a parenchymatous lumpy central area and a few, broad, marginal branches, the latter several cells wide at proximal end and uniseriate at distal end. Vegetative cells with parietal lobed chloroplast. Unicellular stages nearly globular, 30-112 um in diameter; in very young plants a parietal lobed chloroplast visible. Parenchymatous plants produce both bi- and quadriflagellate swarmers, any vegetative cell becoming sporangium of same size and shape. Motile cells formed after sequential division of protoplast and escape through hole in wall, germinating either into unicellular or parenchymatous plants. Unicellular plants produce quadriflagellate zoospores that germinate by enlargement and develop into parenchymatous plants. Young two-celled germlings consist of nearly hemispherical cells. Chlorojackia found once, associated with a mussel shell in a marine embayment, North West Atlantic; description based on plants studied in culture. Heteromorphic life history with alternation of multi- and unicellular stages. The small multicellular thalli have a parenchymatous lumpy central area and a few, broad, marginal branches, the latter several cells wide at proximal end and uniseriate at distal end. Vegetative cells with parietal lobed chloroplast. Unicellular stages nearly globular, 30-112 um in diameter; in very young plants a parietal lobed chloroplast visible. Parenchymatous plants produce both bi- and quadriflagellate swarmers, any vegetative cell becoming sporangium of same size and shape. Motile cells formed after sequential division of protoplast and escape through hole in wall, germinating either into unicellular or parenchymatous plants. Unicellular plants produce quadriflagellate zoospores that germinate by enlargement and develop into parenchymatous plants. Young two-celled germlings consist of nearly hemispherical cells. Chlorojackia found once, associated with a mussel shell in a marine embayment, North West Atlantic; description based on plants studied in culture.

Information contributed by: R. Nielsen. The most recent alteration to this page was made on 2009-02-23 by Wendy 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.

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Citing AlgaeBase
Cite this record as:
Wendy Guiry in Guiry, M.D. & Guiry, G.M. 23 February 2009. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024