Hormidiospora Vinatzer, 1975

Holotype species: Hormidiospora verrucosa Vinatzer

Original publication and holotype designation: Vinatzer, G. (1975). Neue Bodenalgen aus den Dolomiten. Plant Systematics and Evolution 123: 213-235.

Description: Filaments long and often bended, uniseriate and unbranched, without mucilaginous sheath, not sessile. Cells cylindrical without constricted transverse cell walls, containing 1-2 parietal laminate chloroplasts without pyrenoids. Polar cell undifferentiated with rounded ends. Asexual reproduction by biflagellate zoospores (probably) arising singly in cells. Zoospores oval to subspherical enclosing small chloroplast without stigmas. Germination not definitely observed. Single aplanospores released by breakage of parental cell wall followed by enlargement and simultaneous development of thick-walled envelope sculptured with warty projections. Ripened aplanospores producing 6-8 filaments released by breakage of parental wall. Vegetative multiplication by fragmentation of filaments into few-celled fragments. Method of sexual reproduction unknown. Hormidiospora found once as spontaneously growing alga in culture from calcareous soil from central Europe. Hormidiospora closely related to Klebsormidium, differing by absence of pyrenoids, occasional occurrence of two chloroplasts per cell and distinct rough-walled aplanospores. Filaments long and often bended, uniseriate and unbranched, without mucilaginous sheath, not sessile. Cells cylindrical without constricted transverse cell walls, containing 1-2 parietal laminate chloroplasts without pyrenoids. Polar cell undifferentiated with rounded ends. Asexual reproduction by biflagellate zoospores (probably) arising singly in cells. Zoospores oval to subspherical enclosing small chloroplast without stigmas. Germination not definitely observed. Single aplanospores released by breakage of parental cell wall followed by enlargement and simultaneous development of thick-walled envelope sculptured with warty projections. Ripened aplanospores producing 6-8 filaments released by breakage of parental wall. Vegetative multiplication by fragmentation of filaments into few-celled fragments. Method of sexual reproduction unknown. Hormidiospora found once as spontaneously growing alga in culture from calcareous soil from central Europe. Hormidiospora closely related to Klebsormidium, differing by absence of pyrenoids, occasional occurrence of two chloroplasts per cell and distinct rough-walled aplanospores.

Information contributed by: G.M. Lokhorst. The most recent alteration to this page was made on 2023-12-03 by Luka Sato.

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.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=47213

Citing AlgaeBase
Cite this record as:
Luka Sato in Guiry, M.D. & Guiry, G.M. 03 December 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 27 April 2024