Ganonema K.-C.Fan & Y.-C.Wang, 1974

Holotype species: Ganonema farinosum (J.V.Lamouroux) K.-C.Fan & Y.-C.Wang

Original publication and holotype designation: Fan, K.-C. & Wang, Y.-C. (1974). Studies on the marine algae of Hsisha Islands, China I. Ganonema gen. nov. Acta Phytotaxonomica Sinica 12(4): 489-495, 2 pls. [in Chinese and Latin with English summary]

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Description: Thalli calcified or not, upright, attached to the substratum by a discoid holdfast, with a texture ranging from firm and chalky to soft and mucilaginous. Axes terete, dichotomously to irregularly branched or with percurrent axes, often with many short lateral branches. Construction multiaxial, with a central core of medullary filaments bearing lateral assimilatory filaments on swollen, highly differentiated basal cells. Assimilatory filaments sparingly or much divided, generally dichotomous, but often with unbranched outer regions, composed of cylindrical, barrel-shaped or ovoid cells. Adventitious rhizoidal filaments often arising from the lower cells of the assimilatory filaments and acting as medullary filaments and producing additional assimilatory filaments. Outer cortical cells occasionally with terminal hairs or glandular cells. Monoecious or dioecious. Spermatangia in dense, dendroid clusters, arising on short specialised branches arising from apical and lower cells of the assimilatory filaments. Carpogonial branches 3-6 celled, straight to slightly curved, occupying positions of vegetative cortical laterals on primary filaments and also on subsidiary cortical and rhizoidal filaments, frequently compound. Gonimoblast developing directly from the carpogonium, initially by a transverse division, eventually forming a compact cluster of gonimoblast filaments with terminal carposporangia. Fusion cell absent. Carposporangia either simple or quadripartite. Post-fertilization filaments arising from cells in the near vicinity of the carpogonial branch, including those of nearby branches and those above and below the supporting cell, rarely the supporting cell itself, subtending or forming a partial involucre around the gonimoblast. Tetrasporangia (where known) borne on a filamentous tetrasporophyte.

Information contributed by: John Huisman. The most recent alteration to this page was made on 2020-10-01 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: Huisman, J.M. (2006). Liagoraceae. In: Algae of Australia Nemaliales. (Huisman, J.M. Eds), pp. 29-30. Canberra: Australian Biological Resources Study.

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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=34179

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 01 October 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024