Thorea

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title: "Thorea" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["red-algae-genera", "florideophyceae"] description: "Genus of algae" topic_path: "general/red-algae-genera" source: "https://en.wikipedia.org/wiki/Thorea" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of algae ::

| image = Annales du Muséum National d'Histoire Naturelle (Pl 16) BHL28887061.jpg | image_caption = | taxon = Thorea | authority = Bory de Saint-Vincent, 1808 | synonyms = Polycoma unaccepted

Thorella unaccepted

Thorea is a genus of fresh water algae in the division Rhodophyta (red algae). Thorea is a small alga with filaments up to 200 cm long, dark green in colour and not red as are marine Rhodophyta. The filaments have only as few secondary branches.

Thorea is distributed throughout temperate and tropical regions.

The genus was circumscribed by Jean Baptiste Bory de Saint-Vincent in Ann. Mus. Natl. Hist. Nat. vol.12 on page 126 in 1808.

The genus name of Thorea is in honour of Jean Thore (1762–1823), who was a French botanist and physician who practiced medicine in the town of Dax.

Species

As accepted by WoRMS;

• Thorea bachmannii
• Thorea brodensis
• Thorea clavata
• Thorea conturba
• Thorea flagelliformis
• Thorea gaudichaudii
• Thorea hispida
• Thorea okadae
• Thorea okaidai
• Thorea prowsei
• Thorea riekei
• Thorea siamensis
• Thorea violacea
• Thorea zollingeri

Former species;

• Thorea andina accepted as Thorea hispida (synonym)
• Thorea chilensis accepted as Myriogloea chilensis (synonym)
• Thorea lehmannii accepted as Thorea hispida (synonym)
• Thorea ramosissima accepted as Thorea hispida (synonym)

''Thorea'' in UK

There is only one species of Thorea in the British Isles: Thorea hispida (Synonyms: Thorea anadina , T. lehmannii and T. ramosissima ).

The first record of Thorea ramosissima in the British Isles is in Harvey's Manual (1841): Found in a pool in a bog in the County Donegal Mountains, going from Letterkenny to Dunfanaghy; July. These specimens are in the Ulster Museum (BEL: F42–F47), but proved to have been incorrectly identified and were specimens of Batrachospermum.

References

References

1. R. G. Sheath & A. R. Sherwood. (2002). "The Freshwater Algal Flora of the British Isles". [[Cambridge University Press]]. Cambridge.
2. D. M. John, L. R. Leslie & J. A. Moore. (1989). "Observations on ''Thorea ramosissima'' Bory (Batrachospermales, Thoraceae), a freshwater red alga rarely recorded in the British Isles". Br. Phycol. J..
3. Burkhardt, Lotte. (2022). "Eine Enzyklopädie zu eponymischen Pflanzennamen". Botanic Garden and Botanical Museum, Freie Universität Berlin.
4. "WoRMS - World Register of Marine Species - Thorea Bory de Saint-Vincent, 1808".
5. W. H. Harvey. (1841). "A Manual of the British Algae:...". John van Voorst, London.
6. D. M. John, J. A. Moore & L. R. Johnson. (1990). "The red alga ''Thorea'' in the British Isles". Br. Phycol. Newsletter.

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