Thoreaceae

{{Short description|Order of algae}}

{{Automatic taxobox

|image = Annales du Muséum National d'Histoire Naturelle (Pl 16) BHL28887061.jpg

|image_caption = Illustration of 3 types of Thorea species from 1808

|display_parents = 2

|parent_authority = Müller, K.M., Sherwood, A.R., Pueschel, C.M., Gutell, R.R. & Sheath, R.G. 2002

|taxon = Thoreaceae

|authority = Hassall, 1845

}}

Thoreales is an order of red algae belonging to the class Florideophyceae.{{cite journal |last1=Müller |first1=Kirsten M. |last2=Sherwood |first2=Alison R. |last3=Pueschel |first3=Curt M. |last4=Gutell |first4=Robin R. |last5=Sheath |first5=Robert G. |title=A proposal for a new red algal order, the Thoreales |journal=Journal of Phycology |date=16 August 2002 |volume=38 |issue=4 |pages=807–820 |doi=10.1046/j.1529-8817.2002.01055.x}} The order consists only one family, Thoreaceae {{Au|Hassall, 1845}}.Hassall, A.H. 1845. A history of the British freshwater algae, including descriptions of the Desmideae and Diatomaceae. With upwards of one hundred plates, illustrating the various species. Vol. I. pp. [i]–viii, [i]–462, [i, err.]. London, Edinburgh, Paris & Leipzig: S. Highley, H. Baillière; Sunderland & Knox; J.B. Baillière; T.O. Weigel.Kamiya, M., Lindstrom, S.C., Nakayama, T., Yokoyama, A., Lin, S.-M., Guiry, M.D., Gurgel, F.D.G., Huisman, J.M., Kitayama, T., Suzuki, M., Cho, T.O. & Frey, W. 2017. Rhodophyta. In: Syllabus of Plant Families, 13th ed. Part 2/2: Photoautotrophic eukaryotic Algae. (Frey, W. Eds), pp. [i]–xii, [1]–171. Stuttgart: Borntraeger Science Publishers. ISBN 978-3-443-01094-2.

The family of Thoreaceae was circumscribed by Arthur Hill Hassall in A history of the British freshwater algae, including descriptions of the Desmideae and Diatomaceae in 1845.

The family was originally placed in the Nemaliales order before being transferred to the newly created Batrachospermales order,Debashish Bhattacharya (Editor) {{google books|gfTrCAAAQBAJ|Origins of Algae and their Plastids (2012)|page=126}}{{cite journal |last1=Pueschel |first1=Curt M. |last2=Cole |first2=Kathleen M. |title=Rhodophycean Pit Plugs: An Ultrastructural Survey with Taxonomic Implications |journal=American Journal of Botany |date=May–June 1982 |volume=69 |issue=5 |pages=703–720}}{{cite journal |last1=Pueschel |first1=Curt M. |last2=Sullivan |first2=P. Gary |last3=Titus |first3=John E. |title=OCCURRENCE OF THE RED ALGA THOREA VIOLACEA (BATRACHOSPERMALES: THOREACEAE) IN THE HUDSON RIVER, NEW YORK STATE |journal=Rhodora |date=Fall 1995 |volume=97 |issue=892 |pages=328–338}} before being placed later in Thoreales order in 2002. After various species of the family were analysed for the sequences of the genes coding for the large subunit of RUBISCO (rbcL) and the small subunit of rRNA (18S rRNA).Morgan L Vis, Orlando Necchi Jr and Orlando Necchi Júnior {{google books|oM5iEAAAQBAJ|Freshwater Red Algae: Phylogeny, Taxonomy and Biogeography (2021)|page=6}}