Sirodotia Kylin, 1912

Holotype species: Sirodotia suecica Kylin

Original publication and holotype designation: Kylin, H. (1912). Studien über die Schwedischen Arten der Gattungen Batrachospermum Roth und Sirodotia nov. gen. Nova Acta Regiae Societatis Scientiarum Upsaliensis, Series IV 3: 1-40, 16 figs.

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Description: plants monoecious, dioecious, or polyecious, greenish-blue to yellowish green, consistency mucilaginous; branching irregular; whorls well developed or reduced, contiguous or separate, obconical or pear-shaped; main axis covered by cylindrical cells; primary fascicles with cells variable in shape, cylindrical, ellipsoidal, obovoidal, sub-spherical, or spherical; secondary fascicles abundant, covering the entire or two-thirds of internode; spermatangia spherical, sub-spherical, or obovoidal on primary or secondary fascicles in groups of 1–3 or forming clusters; carpogonial branches well differentiated from the fascicles, straight, rarely curved, developing from the periaxial, proximal cells of primary fascicles or cortical filaments, less often from middle and distal cells of primary fascicles or rarely on the secondary fascicles, short, composed of disc- or barrelshaped cells; involucral filaments few and short, composed 1–4 cylindrical or ellipsoidal cells; carpogonia asymmetrical, with a hemispherical protuberance in the basal portion; trichogynes sessile and cylindrical, elongate-cylindrical, elongate- conical, clavate, fusiform, lageniform, ellipsoidal, pear-shaped or irregularly shaped, with or without wavy margins; carposporophyte diffuse extending along the internode; gonimoblast filaments develop on the same side or opposite side of the basal protuberance of the carpogonium; gonimoblast filaments prostrate and indeterminate, composed of cylindrical cells, producing short, erect branches, formed by cylindrical or ellipsoidal cells, with terminal or sub-terminal carposporangia; carposporangia large or small, obovoidal, ellipsoidal, or sub-spherical.

Information contributed by: Vis & Necchi (2021: 289-290). The most recent alteration to this page was made on 2022-04-21 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: Vis, M.L. & Necchi, O., Jr. (2021). Subphylum Eurhodophytina, Class Florideophyceae, Subclass Nemaliophycidae, Order Batrachospermales. In: Freshwater red algae Phylogeny, taxonomy and biogeography. ( Eds), pp. 129-332. Cham: Springer [Springer Nature Switzerland AG].

Comments: Species of the genus has been collected in temperate, tropical, subtropical, and sub-polar regions of Africa, Asia, Australasia, Europe, North and South America.

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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.

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Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 April 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 28 September 2022

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