Bracteacoccus
| Bracteacoccus | |
|---|---|
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| Bracteacoccus aggregatus | |
Scientific classification 
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| Clade: | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Sphaeropleales |
| Family: | Bracteacoccaceae P.M.Tsarenko |
| Genus: | Bracteacoccus Tereg, 1922[1] |
| Type species | |
| Bracteacoccus aggregatus | |
| Species | |
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See text | |
Bracteacoccus is a genus of green algae, the sole genus of the family Bracteacoccaceae.[1] It is a terrestrial alga commonly found in soils, from the tropics to the poles.[2]
History
[edit]Bracteacoccus was described by E. Tereg in 1922, based on the species Bracteacoccus aggregatus.[2] Later it was synonymized with the genus Dictyococcus, until Richard C. Starr reestablished the genus.[3]
Description
[edit]Bracteacoccus consists of solitary, typically spherical cells from 4 to 110 μm in diameter.[2] Mature cells have multiple nuclei (i.e. are multinucleate). Each cell has multiple chloroplasts lining the outer wall of the cell; each chloroplast is angular in shape and lacks pyrenoids.[4]
Bracteacoccus reproduces asexually by producing zoospores. The zoospores have two flagella which are slightly unequal in length. Bracteacoccus may also reproduce by producing non-motile aplanospores.[2]
Morphologically, the genus is essentially indistinguishable from Pseudomuriella and Chromochloris, except for the fact that the latter two genera do not take up fluorescent dyes as easily.[5] The three genera are phylogenetically distinct.[2] It is also similar to the genus Dictyococcus, but Dictyococcus has chloroplasts which are inflected inwards.[3]
Genera
[edit]As of February 2022[update], AlgaeBase accepted the following species:[1]
- Bracteacoccus aerius H.W.Bischoff & Bold
- Bracteacoccus aggregatus Tereg
- Bracteacoccus anomalus (E.J.James) R.C.Starr
- Bracteacoccus bohemiensis Fuciková, Flechtner & L.A.Lewis
- Bracteacoccus bullatus Fuciková, Flechtner & L.A.Lewis
- Bracteacoccus deserticola Fuciková, Flechtner & L.A.Lewis
- Bracteacoccus giganteus H.W.Bischoff & Bold
- Bracteacoccus glacialis Fuciková, Flechtner & L.A.Lewis
- Bracteacoccus grandis H.W.Bischoff & Bold
- Bracteacoccus medionucleatus H.W.Bischoff & Bold
- Bracteacoccus minor (Schmidle ex Chodat) Petrová
- Bracteacoccus occidentalis Fuciková, Flechtner & L.A.Lewis
- Bracteacoccus polaris Fuciková, Flechtner & L.A.Lewis
- Bracteacoccus pseudominor H.W.Bischoff & Bold
- Bracteacoccus ruber Novis & Visnovsky
- Bracteacoccus xerophilus Fuciková, Flechtner & L.A.Lewis
A further species, Bracteacoccus helveticus (Kol & F.Chodat) Starr, was regarded as of "uncertain taxonomic status".[1]
References
[edit]- ^ a b c d Guiry, M.D.; Guiry, G.M. "Bracteacoccus". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2022-02-24.
- ^ a b c d e Fučíková, Karolina; Flechtner, Valerie R.; Lewis, Louise A. (2012). "Revision of the genus Bracteacoccus Tereg (Chlorophyceae, Chlorophyta) based on a phylogenetic approach". Nova Hedwigia. 96 (1–2): 15–59. doi:10.1127/0029-5035/2012/0067.
- ^ a b Fučíková, Karolina; Rada, Jared C.; Lewis, Louise A. (2011). "The tangled taxonomic history of Dictyococcus, Bracteacoccus and Pseudomuriella (Chlorophyceae, Chlorophyta) and their distinction based on a phylogenetic perspective". Phycologia. 50 (4): 422–429. doi:10.2216/10-69.1. S2CID 84281955.
- ^ 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.
- ^ Fučíková, Karolina; Lewis, Louise A. (2012). "Intersection of Chlorella, Muriella and Bracteacoccus: Resurrecting the genus Chromochloris Kol et Chodat (Chlorophyceae, Chlorophyta)". Fottea. 12: 83–93. doi:10.5507/fot.2012.007.
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