Belongs within: Mediophyceae.
Contains: Stephanodiscus.
Thalassiosira is a genus of centric diatoms found primarily in marine waters, with some species found in fresh water. The genus is probably not monophyletic with other genera nested within it (Alverson et al. 2007).
Characters (Spaulding & Edlund 2008): Valve face flat or tangentially undulate; fultoportulae one to several near the center valve; valve margin with spines or occluded processes; mantle narrow.
Thalassiosira
|--T. gessneriAJT07
`--+--+--T. guillardiiAJT07
| `--T. weissflogiiAJT07
`--+--+--T. pseudonana Cleve 1873AJT07, AB19 [incl. Cyclotella nanaAJT07]
| `--Cyclotella Kützing 1833AJT07, W61
| | i. s.: C. antiquaG64
| | C. astraea [incl. C. rotula]G64
| | C. bella [incl. Stephanodiscus novaezeelandiae]C04
| | C. choctawatcheeanaBM08
| | C. comtaSG05
| | C. dallasianaG64
| | C. glomerataG63
| | C. krammeri [incl. C. kuetzingiana]C04
| | |--C. k. var. krammeriG63
| | `--C. ‘kuetzingiana’ var. parvaG63
| | C. operculataG64
| | C. punctataG64
| | C. scoticaG64
| | C. stelligeraW61
| |--*C. distinguendaAJT07
| `--+--+--C. atomusAJT07
| | `--+--C. striataAJT07
| | `--C. stylorumAJT07
| `--+--C. crypticaAJT07
| `--+--C. gammaAJT07
| `--C. meneghiniana Kützing 1844AJT07, CFW59
`--+--+--T. oceanicaAJT07
| `--SkeletonemaAJT07
| | i. s.: S. costatum Greville 1866C03
| | S. menziesiiW87
| |--S. subsalsumAJT07
| `--+--S. menzelliiAJT07
| `--+--S. japonicumAJT07
| `--+--S. grethaeAJT07
| `--S. pseudocostatumAJT07
`--+--+--T. nodulolineataAJT07
| `--+--T. anguste-lineataAJT07
| `--T. mediterraneaAJT07
`--+--+--T. angulataAJT07
| `--+--T. minusculaAJT07
| `--+--T. antarcticaAJT07
| `--+--+--T. rotulaAJT07
| | `--+--T. eccentricaAJT07
| | `--T. punctigeraAJT07
| `--+--T. tumidaAJT07
| `--ShionodiscusAJT07
| |--S. oestrupiiAJT07
| | |--S. o. var. oestrupiiAJT07
| | `--S. o. var. venrickaeAJT07
| `--S. ritscheriAJT07
`--+--+--+--Minidiscus trioculatusAJT07
| | `--+--*T. nordenskioeldiiAJT07
| | `--T. minimaAJT07
| `--+--+--T. aestivalisAJT07
| | `--T. pacificaAJT07
| `--DetonulaAJT07
| |--D. confervaceaDG01
| |--D. cystiferaB26
| `--D. pumilaAJT07
`--+--BacterosiraAJT07
| |--B. bathyomphalaAJT07
| `--B. fragilisB26
`--+--DiscostellaAJT07
| |--D. pseudostelligeraAJT07
| `--D. stelligeraAJT07
`--+--+--‘Cyclotella’ bodanicaAJT07
| `--‘Cyclotella’ ocellataAJT07
`--+--CyclostephanosAJT07
| |--C. invisitatusAJT07
| `--C. tholiformisAJT07
`--StephanodiscusAJT07
Thalassiosira incertae sedis:
T. alleniiCH97
T. balticaB26
T. bioculataB26
T. cleveiB26
T. convexaBC79
T. decipiensB26
T. gravidaOHJ84
T. hyalinaB26
T. malaOSS10
T. partheneiaGE87
T. subtilisRA05
*Type species of generic name indicated
References
[AB19] Adl, S. M., D. Bass, C. E. Lane, J. Lukeš, C. L. Schoch, A. Smirnov, S. Agatha, C. Berney, M. W. Brown, F. Burki, P. Cárdenas, I. Čepička, L. Chistyakova, J. del Campo, M. Dunthorn, B. Edvardsen, Y. Eglit, L. Guillou, V. Hampl, A. A. Heiss, M. Hoppenrath, T. Y. James, A. Karnkowska, S. Karpov, E. Kim, M. Kolisko, A. Kudryavtsev, D. J. G. Lahr, E. Lara, L. Le Gall, D. H. Lynn, D. G. Mann, R. Massana, E. A. D. Mitchell, C. Morrow, J. S. Park, J. W. Pawlowski, M. J. Powell, D. J. Richter, S. Rueckert, L. Shadwick, S. Shimano, F. W. Spiegel, G. Torruella, N. Youssef, V. Zlatogursky & Q. Zhang. 2019. Revisions to the classification, nomenclature, and diversity of eukaryotes. Journal of Eukaryotic Microbiology 66: 4–119.
[AJT07] Alverson, A. J., R. K. Jansen & E. C. Theriot. 2007. Bridging the Rubicon: phylogenetic analysis reveals repeated colonizations of marine and fresh waters by thalassiosiroid diatoms. Molecular Phylogenetics and Evolution 45: 193–210.
[BC79] Berggren, W. A., & J. A. Van Couvering. 1979. Quaternary. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A505–A543. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).
[B26] Bigelow, H. B. 1926. Plankton of the offshore waters of the Gulf of Maine. Bulletin of the Bureau of Fisheries 40 (2): 1–509.
[BM08] Bruder, K., & L. K. Medlin. 2008. Morphological and molecular investigations of naviculoid diatoms. III. Hippodonta and Navicula s. s. Diatom Research 23 (2): 331–347.
[CH97] Castro, P., & M. E. Huber. 1997. Marine Biology 2nd ed. WCB McGraw-Hill: Boston.
[C03] Chan, B. K. K. 2003. Studies on Tetraclita squamosa and Tetraclita japonica (Cirripedia: Thoracica) II: larval morphology and development. Journal of Crustacean Biology 23 (3): 522–547.
[C04] Compère, P. 2004. Report of the Committee for Algae: 8. Taxon 53 (4): 1065–1067.
[CFW59] Crosby, L. H., & E. J. Ferguson Wood. 1959. Studies on Australian and New Zealand diatoms. II.—Normally epontic and benthic genera. Transactions of the Royal Society of New Zealand 86 (1): 1–58, pls 1–9.
[DG01] Daugbjerg, N., & L. Guillou. 2001. Phylogenetic analyses of Bolidophyceae (Heterokontophyta) using rbcL gene sequences support their sister group relationship to diatoms. Phycologia 40 (2): 153–161.
[GE87] Gaines, G., & M. Elbrächter. 1987. Heterotrophic nutrition. In: Taylor, F. J. R. (ed.) The Biology of Dinoflagellates pp. 224–268. Blackwell Scientific.
[G63] Giffen, M. H. 1963. Contributions to the diatom flora of South Africa. I. Diatoms of the estuaries of the eastern Cape Province. Hydrobiologia 21: 201–265.
[G64] Gray, J. E. 1864. Handbook of British Water-weeds or Algae. R. Hardwicke: London.
[OSS10] Orlova, T. Yu., I. V. Stonik & M. S. Selina. 2010. The diversity of HABs causative organisms on the Russian Pacific coast. In: China-Russia Bilateral Symposium: Proceedings of the China-Russia Bilateral Symposium of “Comparison on Marine Biodiversity in the Northwest Pacific Ocean”, 10–11 October 2010, Qingdao (China) pp. 66–70. Institute of Oceanology, Chinese Academy of Sciences; A. V. Zhirmunsky Institute of Marine Biology, Far East Branch of the Russian Academy of Sciences.
[OHJ84] Østgaard, K., E. N. Hegseth & A. Jensen. 1984. Species-dependent sensitivity of marine planktonic algae to Ekofisk crude oil under different light conditions. Botanica Marina 27: 309–318.
[RA05] Rath, J., & S. P. Adhikary. 2005. A check list of algae from Chilika Lake, Orissa. Bulletin of the Botanical Survey of India 47: 101–114.
[SG05] Sau, A., & R. K. Gupta. 2005. Algal flora of Indian Botanic Garden, Howrah, West Bengal. Bulletin of the Botanical Survey of India 47: 63–86.
[W87] Withers, N. 1987. Dinoflagellate sterols. In: Taylor, F. J. R. (ed.) The Biology of Dinoflagellates pp. 316–359. Blackwell Scientific.
[W61] Wood, E. J. F. 1961. Studies on Australian and New Zealand diatoms. V.—The Rawson Collection of recent diatoms. Transactions of the Royal Society of New Zealand 88 (4): 699–712.