Biology:Mediolabrus
Mediolabrus is a genus of centric diatoms within the family Thalassiosiraceae. Known Mediolabrus species live planktonically in brackish and fresh water.[1] This genus, together with the related Minidiscus, includes some of the smallest diatom species with diameters as small as 1.9 μm (in M. comicus).[2]
Taxonomy
Genus Mediolabrus was erected in 2020 based on molecular phylogenetics, by transferring three species from the genus Minidiscus.[1]
Morphology and ultrastructure
The lenticular or spherical cells, smaller than 10 μm, live solitarily or in flocks. The valves (ends of the siliceous shell[3]) are domed, with sloping mantle (side of the valve[4]). The areolae (regularly repeated pores[5]) are internally covered by individual, radially continuous cribra (perforated plates[6]) and lack typical foramens (large openings[7]) externally. At the edge of the valve face or close to the mantle are several fultoportulae (tube-like pores[8]). There is only one rimoportula (lip-like pore[9]) and no fultoportulae in the center or sub-center of the valve. Only a single rimoportula near the valve center is a diagnostic feature of this genus and the source of its name.[1]
See also
- Smallest organisms
References
- ↑ 1.0 1.1 1.2 Li, Yang; Guo, Xiao-Hui; Lundholm, Nina (2020). Wetherbee, R.. ed. "Molecular Phylogeny and Taxonomy of the Genus Minidiscus (Bacillariophyceae), with Description of Mediolabrus gen. nov" (in en). Journal of Phycology 56 (6): 1443–1456. doi:10.1111/jpy.13038. ISSN 0022-3646. PMID 32510583. Bibcode: 2020JPcgy..56.1443L. https://onlinelibrary.wiley.com/doi/10.1111/jpy.13038.
- ↑ Jewson, David; Kuwata, Akira; Cros, Lluïsa; Fortuño, José Manuel; Estrada, Marta (2016-09-30). "Morphological adaptations to small size in the marine diatom Minidiscus comicus". Scientia Marina 80 (S1): 89–96. doi:10.3989/scimar.04331.06C. ISSN 1886-8134. Bibcode: 2016ScMar..80S..89J. https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1660.
- ↑ "Valve | Glossary - Diatoms of North America" (in en-US). https://diatoms.org/glossary/valve.
- ↑ "Mantle | Glossary - Diatoms of North America" (in en-US). https://diatoms.org/glossary/mantle.
- ↑ "Areola | Glossary - Diatoms of North America" (in en-US). https://diatoms.org/glossary/areola.
- ↑ "Cribrum | Glossary - Diatoms of North America" (in en-US). https://diatoms.org/glossary/cribrum.
- ↑ "Foramen | Glossary - Diatoms of North America" (in en-US). https://diatoms.org/glossary/foramina.
- ↑ "Fultoportula | Glossary - Diatoms of North America" (in en-US). https://diatoms.org/glossary/fultoportula.
- ↑ "Rimoportula | Glossary - Diatoms of North America" (in en-US). https://diatoms.org/glossary/rimoportula.
External links
- Mediolabrus in NCBI Taxonomy
- Guiry, M.D.; Guiry, G.M. (2008). "Mediolabrus". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org/browse/taxonomy/?id=53007.
Wikidata ☰ Q134127237 entry
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