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Sirodotia

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Genus of algae
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Sirodotia
Scientific classification Edit this classification
Clade: Archaeplastida
Division: Rhodophyta
Class: Florideophyceae
Order: Batrachospermales
Family: Batrachospermaceae
Genus: Sirodotia
Kylin 1912

Sirodotia Kylin (1912) is a genus of freshwater red alga in the Batrachospermaceae family, found in temperate and tropical waters. It was first described by Kylin in 1912.

Etymology

The genus name of Sirodotia is in honour of Simon Sirodot (1825–1903), who was a French botanist and algologist. He was also a zoologist and archaeologist, who taught at schools in Toulouse, Strasbourg, Le Mans, Cahors and Limoges.

Taxonomy

Sirodotia was first described by Kylin in 1912. The order Batrachospermales currently has six genera—Sirodotia, Batrachospermum, Kumanoa, Nothocladus, Tuomeya, and Sheathia. The morphology of the gametophyte of Batrachospermum, Sirodotia, Tuomeya, and Nothocladus are more are less similar to each other. In 1990, Necchi and Entwisle proposed to delimit them and raise Batrachospermum from genus level to section level. Phylogenetic studies have further supported the separation of these groups at the genus level.

Description

Attached, gelatinous gametophytic filaments, up to 17 cm long, with a beaded appearance varying from blue-green to yellow-green. Uniseriate central axis with large, cylindrical cells; 4–6 pericentral producing repeatedly branched fascicles of limited growth. In most species, rhizoid-like cortical filaments from lower side of pericentral cells. Each fascicle cell contains several, ribbon-like, parietal chloroplasts with no pyrenoid. Spermatangia budded off terminal fascicle cells, spherical, colorless, 4–7 μm diameter. Little differentiated carpogonial branches with small cells. Carpogonia with broad trichogyne attached off-center to base, latter structure having a definite protrusion. Carposporophyte a branched filament creeping along main axis; carposporangia formed at branch apices. Carpospores germinate into Chantransia (= Pseudochantransia) stage, composed of branched, uniseriate filaments. Meiosis and monosporangia not observed.

The genus Sirodotia has been recognized by the two important reproductive characters such as asymmetrical carpogonium in the gametophyte and indeterminate/indistinct gonimoblast filament in the carposporophyte. Further recognition of species inside the genus is done by various distinct characters like morphology of the gametophyte, position of spermatangia, position of the carpogonial branch, gonimoblast filament arising from the side of from carpogonium, and the size of the carpogonium.

Distribution

Sirodotia species are found worldwide in tropical and temperate freshwaters. In India, it is reported from the Western Ghats and Eastern Ghats.

Species

As accepted by Algae Base:

Former species:

References

  1. Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names] (pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN 978-3-946292-41-8. S2CID 246307410. Retrieved January 27, 2022.
  2. Necchi, O.; Entwisle, T. J. (2019). "A reappraisal of generic and subgeneric classification in the Batrachospermaceae (Rhodophyta)". Phycologia. 29 (4): 478–488. doi:10.2216/i0031-8884-29-4-478.1. ISSN 0031-8884.
  3. ^ Entwisle, Timothy J.; Vis, Morgan L.; Chiasson, Wayne B.; Necchi Jr., Orlando; Sherwood, Alison R. (2009-06-05). "SYSTEMATICS OF THE BATRACHOSPERMALES (RHODOPHYTA)—A SYNTHESIS 1". Journal of Phycology. 45 (3): 704–715. doi:10.1111/j.1529-8817.2009.00686.x. ISSN 0022-3646.
  4. ^ "Sirodotia Kylin, 1912 :: Algaebase". www.algaebase.org. Retrieved 2016-09-21.
  5. ^ Starmach, K. 1977. Flora Stodkowodna Polski Tom. 14, Warsaw and Krakow: Polska Akademia Nauk Instytut Botaniki.
  6. ^ Necchi, O. Jr, Sheath R.G. & Cole K.M. 1993. Distribution and systematics of the freshwater genus Sirodotia (Batrachospermales, Rhodophyta) in North America. Journal of Phycology 29: 236–243.
  7. Kumano, S. 2002. Freshwater Red Algae of the World. Biopress Ltd., Bristol, UK, pp.375.
  8. Necchi, J. O., Vis M. L., and Oliveira, M. C. 2007. Phylogenetic relationship of Sirodotia species (Batrachospermales, Rhodophyta) in North and South America. Cryptogamie Algologie. 28.
  9. Balakrishnan, M.S. & Chaugule, B.B. (1980). Indian Batrachospermaceae. In: Taxonomy of Algae. Papers presented at the International Synposium on Taxonomy of Algae held at the Cenre of Advanced Study in Botany University of Madras, December 9–16, 1974. (Desikachary, T.V. & Raja Rao, V.N Eds), pp. 223–248. Madras: University of Madras.
  10. Ulagalanthaperumal, Elaya Perumal; Rani, V. Uma; Chaugule, B.B. (2015-12-31). "Studies on a Red Alga Sirodotia huillensis (Batrachospermaceae) from Orissa State, India". Journal of Theoretical and Experimental Biology. 11 (3&4) – via Research Gate.
  11. "WoRMS - World Register of Marine Species - Sirodotia Kylin, 1912". www.marinespecies.org. Retrieved 27 October 2022.
Taxon identifiers
Sirodotia
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