Mediolabrus
| Mediolabrus | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Sar |
| Clade: | Stramenopiles |
| Phylum: | Ochrophyta |
| Clade: | Diatomeae |
| Class: | Bacillariophyceae |
| Order: | Thalassiosirales |
| Family: | Thalassiosiraceae |
| Genus: | Mediolabrus Yang Li |
| Type species | |
| Mediolabrus comicus (H.Takano) Yang Li
| |
| Species | |
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
[edit]Genus Mediolabrus was erected in 2020 based on molecular phylogenetics, by transferring three species from the genus Minidiscus.[1]
Morphology and ultrastructure
[edit]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
[edit]References
[edit]- ^ a b c 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". Journal of Phycology. 56 (6): 1443–1456. Bibcode:2020JPcgy..56.1443L. doi:10.1111/jpy.13038. ISSN 0022-3646. PMID 32510583.
- ^ 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. Bibcode:2016ScMar..80S..89J. doi:10.3989/scimar.04331.06C. hdl:10261/138162. ISSN 1886-8134.
- ^ "Valve | Glossary - Diatoms of North America". diatoms.org. Retrieved 2025-04-26.
- ^ "Mantle | Glossary - Diatoms of North America". diatoms.org. Retrieved 2025-04-26.
- ^ "Areola | Glossary - Diatoms of North America". diatoms.org. Retrieved 2025-04-26.
- ^ "Cribrum | Glossary - Diatoms of North America". diatoms.org. Retrieved 2025-04-26.
- ^ "Foramen | Glossary - Diatoms of North America". diatoms.org. Retrieved 2025-04-26.
- ^ "Fultoportula | Glossary - Diatoms of North America". diatoms.org. Retrieved 2025-04-26.
- ^ "Rimoportula | Glossary - Diatoms of North America". diatoms.org. Retrieved 2025-04-26.
External links
[edit]- Mediolabrus in NCBI Taxonomy
- Guiry, M.D.; Guiry, G.M. "Mediolabrus". AlgaeBase. University of Galway.