Himehibirhodia M.Hoshino, Kitayama & Kogame, 2024

Holotype species: Himehibirhodia minima (Okamura) M.Hoshino, Kitayama & Kogame

Original publication and holotype designation: Hoshino, M., Wakeman, K.C., Kato, A., Kitayama, T., Sherwood, A.R., Uwai, S. & Kogame, K. (2024). Taxonomic study of the polyphyletic Dudresnaya (Dumontiaceae, Florideophyceae) with descriptions of Dudresnaya ryukyuensis sp. nov. and two new genera, Himehibirhodia and Nudresdaya. Phycological Research 72: 133–148, 9 figures, 1 table.

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Description: The gametophytes are erect, gregarious, attached to substrata by a small discoid holdfast, uniaxial, cylindrical, irregularly subdichotomously branched. Color is crimson to light purple. Texture very soft, gelatinous and lubricous. The branches are annulated. The cortical fascicles are branched di- or tri-chotomously, with a colorless hair at the terminus. The outer cortical cells are cylindrical. The gametophytes dioicous. The spermatangia are produced at the distal end of the terminal cells of the cortical fascicles. The carpogonial branches are usually 6–7 celled including the basal cell and strongly crooked near the terminus. The auxiliary cell branches are typically 6–9 celled, all cells are modified and rounded, including the terminal cells; the auxiliary cell is intercalary, usually the third cell from the base, the same in size and shape as neighboring cells of the branch, but more transparent and showing a large nucleus. After fertilization, the carpogonium directly fuses with the fourth cell (counting from the terminal carpogonium) of the carpogonium branch that is in contact with it, and then cuts off a primary connecting filament fusing with the fifth cell. The resulting two fusion complexes cut off secondary connecting filaments to the auxiliary cells. The trichogyne degenerates and disappears by the time the primary connecting filament fuses with the fifth cell. Carposporophytes up to 150 µm in diameter. The released carpospores are 28–35 µm in diameter. The tetrasporophytes are crustose, and the tetrasporangia are irregularly cruciate. The released tetraspores are 20–25 µm in diameter.

Information contributed by: Original description.. The most recent alteration to this page was made on 2024-07-10 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 feminine.

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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=55209

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 July 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 17 September 2024