Schroederia (alga)

Schroederia is a genus of green algae in the family Schroederiaceae.^[1] Schroederiaceae is a monotypic taxon; Schroederia is its only genus.^[2]

Schroederia
Schroederia setigera
Scientific classification
Clade:	Viridiplantae
Division:	Chlorophyta
Class:	Chlorophyceae
Order:	Sphaeropleales
Family:	Schroederiaceae
Genus:	Schroederia Lemmermann, 1898
Type species
Schroederia setigera (Schröder) Lemmermann

The genus was circumscribed by Ernst Johann Lemmermann in Hedwigia vol.37 on page 311 in 1898. The genus name of Schroederia is in honour of Ludwig Julius Bruno Schröder (1867–1928), who was a German teacher, botanist (Algology and Bryology), also Hydrobiologist and Zoologist. He worked as a deputy head teacher in Breslau.^[3]

Description

Schroederia consists of solitary cells that are needle- or spindle-shaped. They may be straight or curved. The cells end in long spines; at one end the spine may be bifurcated. Cells contain a single parietal chloroplast and one or several pyrenoids.^[4] As the cell matures, it develops multiple parietal chloroplasts along its long axis.^[5] Cells have one nucleus (uninucleate) when young but may become multinucleate.^[1]

Species are distinguished from one another by their overall shape and size.^[1]

Reproduction

Schroederia reproduces excusively by asexual means.^[1] Schroederia produces zoospores with two flagella, which are released when the mother cell's wall tears open.^[1] Zoospores contain a single contractile vacuole and a cup-shaped chloroplast with a single pyrenoid.^[1]

Distribution

Schroederia is commonly found in as phytoplankton in freshwater habitats.^[4] It has an essentially cosmopolitan distribution, being found in tropical and temperate habitats worldwide.^[1]

Species

As accepted by AlgaeBase;^[1]

• Schroederia ecsediensis Hortobágyi, 1960
• Schroederia indica Philipose, 1967
• Schroederia nitzschioides (G.S.West) Korschikov, 1953
• Schroederia planctonica (Skuja) Philipose, 1967
• Schroederia setigera (Schröder) Lemmermann, 1898
• Schroederia spiralis (Printz) Korshikov, 1953

Former species;

• S. ancora (G.M.Smith) G.M.Smith, 1933 accepted as Ankyra ancora (G.M.Smith) Fott, 1957 (synonym)
• S. antillarum Komárek, 1983 accepted as Pseudoschroederia antillarum (Komárek) Hegewald & Schnepf, 1986 (synonym)
• S. belonophora Schmidle, 1900 as Centritractus belenophorus (Schmidle) Lemmermann, 1900 (synonym)
• S. judayi G.M.Smith, 1916 accepted as Ankyra judayi (G.M.Smith) Fott, 1957
• S. robusta Korshikov, 1953 accepted as Pseudoschroederia robusta (Korshikov) E.Hegewald & E.Schnepf, 1986 (synonym)

References

1. Guiry, M.D.; Guiry, G.M. "Schroederia". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2022-02-23.
2. Guiry, M.D.; Guiry, G.M. "Schroederiaceae". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.
3. 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. Retrieved January 27, 2022.
4. Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN 978-0-12-385876-4.
5. Bicudo, Carlos E. M.; Menezes, Mariângela (2006). Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições (2 ed.). RiMa Editora. p. 508. ISBN 857656064X.

External links

• AlgaTerra database
• Index Nominum Genericorum