Thoreales is an order of red algae belonging to the class Florideophyceae.[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,. 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.[
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The family was originally placed in the Nemaliales order before being transferred to the newly created Batrachospermales order,[Debashish Bhattacharya (Editor) ][Morgan L Vis, Orlando Necchi Jr and Orlando Necchi Júnior ]
Description
The order is characterized by having freshwater species with multi-axial , a uni-axial chantransia stage, and Pit connection with two cap layers, the outer one of which is usually plate-like.
Distribution
The family has cosmopolitan distribution.[P. M. McCarthy and Lyn Jessup ] and South America), but Nemalionopsis has been only found in Asia and North America.
Genera
As accepted by AlgaeBase;
Former genera; Polycoma and Thorella ,
