Brachytrichia Zanardini ex Bornet & Flahault, 1886
Lectotype species: Brachytrichia quoyi Bornet & Flahault
Original publication: Bornet, E. & Flahault, C. (1886 '1887'). Revision des Nostocacées hétérocystées contenues dans les principaux herbiers de France (deuxième fragment). Annales des Sciences Naturelles, Botanique, Septième Série 4: 343-373.
Request PDFType designated in: Geitler, L. (1942). Schizophyta: Klasse Schizophyceae. In: Die natürlichen Pflanzenfamilien, Sweite Auflage. (Engler, A. & Prantl, K. Eds) Vol.1b, pp. 1-232. Leipzig: Wilhelm Engelmann.
Description: Filamentous - thallose; thallus flat to hemispherical, to 5 cm in diam., mucilaginous, sometimes crusty, hollow in the center when old, dark green or brownish, composed of horizontal layers of freely tangled or more or less parallel and radial (vertical to substrate) true branched trichomes, without loop formations. Sheaths present in young trichomes, colorless or yellowish, absent and diffluent in old trichomes, but filaments enveloped by common, limited mucilage. Trichomes more or less cylindrical in the middle part, uniseriate; trichomes and branches toward the ends continually narrowed, sometimes up to the hairs with narrow, elongated cells; old trichomes (in old parts of thallus) more freely coiled, thinner, with more elongate and cylindrical cells; types of true branching: reverse Y-type, rarely V-type. Heterocytes intercalary, spherical, barrel-shaped, sometimes shorter or longer than wide, usually wider than vegetative cells. Akinetes missing. Cell division transverse, in meristematic zones. Reproduction by hormogonia, which fragment from branches after separation of terminal hairs. Marine, in littoral on stones and shells. Occurs on limestone coasts in tropical and subtropical seas worldwide.
Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-03-06 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.
Most recent taxonomic treatment adopted: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=43091
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 November 2024
