Stauromatonema Frémy, 1930
Lectotype species: Stauromatonema viride Frémy
Original publication: Frémy, Abbé P. (1930 '1929'). Les Myxophycées de l'Afrique équatoriale française. Archives de Botanique, Mémoires 3(2): 1-508, 362 figs, 1 folded map.
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 gelatinous, firm, flat, crusty, composed of basal, creeping, coiled filaments, from which grow numerous erect, densely parallel oriented, not very long branches, which are repeatedly divaricated. Trichomes in creeping filaments multiseriate, sometimes disintegrating, in chroococcoid mass, from which grow erect trichomes - branches (T-type of branching); erect trichomes uniseriate, repeatedly V-like true branched, branches grow more or less parallel and perpendicular to the substrate. Sheaths thin, firm, colorless, sometimes slightly gelatinous at sides, not or slightly lamellated, closed at the apex of young trichomes; trichomes mainly torulous, with clear constrictions at crosswalls, more or less cylindrical or slightly widened to the ends, with broadly rounded terminal cells. Cells irregular rounded or barrel-shaped, isodiametric or slightly longer or shorter than wide. Heterocytes intercalary, rounded barrel-shaped. Akinetes not known. Cells divide in different planes in basal trichomes and pseudoparenchymatous but mainly crosswise in erected branches. Reproduction by solitary monocytes (planocytes ?), which liberate from the end of branches after opening of the sheath, rarely from intercalary cells. Hormogonia and hormocysts not known. On stones in springs, creeks, rarely in lake littoral. Tropical species, known from equatorial Africa and Indonesia.
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=46470
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 04 May 2024
