Braarudosphaera bigelowii

Braarudosphaera bigelowii est species algarum unicellularium ordinis Coccolithalium, cuius testa dodecahedri formam exhibet.

Braarudosphaerae testam (sceletum nempe externum) e duodecim squamis pentagonalibus (quae ergo pentalithi dicuntur) calcareis constitutam habent, quae squamae simul dispositae dodecahedron regulare efformant. Nomen huius generis Trygve Braarud, botanistam Norvegicum commemorat,Deflandre, Georgius (1947) Braarudosphaera nov. gen., type d'une famille nouvelle de Coccolithophoridés actuels à éléments composites. Comptes rendus hebdomadaires des séances de l'Académie des sciences publiés... par MM. les secrétaires perpétuels, 225: 439–441. species autem hodiernae intra hoc duae sunt, B. bigelowii (Gran & Braarud) Deflandre et B. magnei Lefort. Ambae species marinae et plancticae sunt.Hagino, Kyoko; Onuma, Ryo; Kawachi, Masanobu & Horiguchi, Takeo (2013). Discovery of an endosymbiotic Nitrogen-fixing Cyanobacterium UCYN-A in Braarudosphaera bigelowii (Prymnesiophyceae). PLOS ONE. 8 (12): e81749.

Braarudosphaera bigelowii celeberrima est primo propter longaevitatem suam, cum fossilia huius speciei in petris Cretaceis (ante circiter 100 000 000 annorum formatis) inventae sint, e quo constat hanc speciem exstinctionem ad terminum Cretacei Palaeogenique superfuisse;Jones, Heather L.; Scrobola, Zacharias & Bralower, Timotheus J. (2021) Size and shape variation in the calcareous nannoplankton genus Braarudosphaera following the Cretaceous/Paleogene (K/Pg) mass extinction: clues as to its evolutionary success. Paleobiology, 47 (4): 680–703. secundo autem propter organellum apud nulla alia Eukaryota inventum, nitroplastum scilicet, cuius gratia haec alga nitrogenium atmosphaericum assimilare potest.Massana, Ramon (2024) The nitroplast: A nitrogen-fixing organelle. Science, 384 (6692): 160–161.

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Categoria:Organismi aquatici
Categoria:Protista
Categoria:Species plantarum