Hormoscilla Anagnostidis & Komárek, 1988: 425
Holotype species: Hormoscilla xishaensis (Hua) Anagnostidis & Komárek
Original publication and holotype designation:Anagnostidis, K. & Komárek, J. (1988). Modern approach to the classification system of cyanophytes. 3. Oscillatoriales. Archiv für Hydrobiologie, Supplement 80: 327-472, 35 figs, 13 tables.
Taxonomic status: currently recognized as a distinct genus.
Description: Filamentous; solitary, free-living trichomes or small groups of trichomes. Trichomes with a limited growth, more or less short (to 30 cells per trichome), rarely long with many cells (in cultures), to 140 _m long, 4-12 _m wide, simple, isopolar, uniseriate, unbranched, sheathless, straight, slightly irregularly waved or semicircular curved, not attenuated at the ends, constricted or unconstricted at the crosswalls. Trichomes nonmotile, easily fragmenting into short segments (nonmotile hormocytes). Cells always shorter than wide, rarely up to almost isodiametric, shortly cylindrical or barrel-shaped, end cells widely rounded, without aerotopes, thylakoids irregularly coiled, Å perpendicularly situated to the longitudinal cell walls. Heterocytes and akinetes absent. Cell division crosswise, with all cells capable to divide. Reproduction by the division of trichomes, proceeding regularly by help of special sacrificed cells like discs; trichomes dissociate along the total length, sometimes to solitary cells. Hormocytes germinate at both ends (isopolar). Two species are known from marine localities (epi- or endozoic in invertebrates), one species was isolated from soil in England.
NCBI Nucleotide Sequences
Numbers of names and species: There are 7 species (and infraspecific) names in the database at present, of which 7 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Hormoscilla endophytica (Li) Anagnostidis C
Hormoscilla feldmannii Anagnostidis C
Hormoscilla fragmentosa Komárek & Komárková-Legnerová C
Hormoscilla irregularis Novis & Visnovsky C
Hormoscilla pringsheimii Anagnostidis & Komárek C
Hormoscilla spongeliae (Gomont) Anagnostidis & Komárek C
Hormoscilla xishaensis (Hua) Anagnostidis & Komárek C - type
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: http://www.algaebase.org/search/genus/detail/?genus_id=47363
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 06 December 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:5481