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IRMNG taxon detailsBraarudosphaerales
marine,
recent + fossil
Not documented
Taxonomic remark emend. J.A. Lees & P.R. Bown, 2016
Taxonomic remark emend. J.A. Lees & P.R. Bown, 2016 [details] Taxonomic remark From Nannotax3: Lees & Bown (2016) emended the order Braarudosphaerales to include the Nannoconaceae on the grounds that...
Taxonomic remark From Nannotax3: Lees & Bown (2016) emended the order Braarudosphaerales to include the Nannoconaceae on the grounds that pentaliths and nannoconids both showed structures formed of multiple layers of thin elements. In the case of pentaliths these thin elements appear as laminae witin individual crystal units, in nannoconids they are stacked with offset, both groups appear at the end Jurassic and show tangential c-axis orientations as well as simple rotational symmetry, (without modification by central area structures or elongation into elliptical forms). Varol & Bowman (2019) have since shown that Polycyclolithus is a nannoconid, from side view observations with a mobile mount. Other possibly related taxa which show tangential c-axes and simple rotational symmetry but not stacked layers of elements include the Polycyclolithaceae and the genera Kokia, and Tegulalithus. These are now tentatively included here. [details]
IRMNG (2021). Braarudosphaerales. Accessed at: https://irmng.org/aphia.php?p=taxdetails&id=11917701 on 2024-11-24
basis of record
Young, J. R.; Bown, P. R.; Lees, J. A. (eds). Nannotax3 website. International Nannoplankton Association (2020 version). Available online at http://www.mikrotax.org/Nannotax3/. [details]
taxonomy source Young, J. R.; Bown, P. R.; Lees, J. A. (eds). Nannotax3 website. International Nannoplankton Association (2020 version). Available online at http://www.mikrotax.org/Nannotax3/. [details] name verified source Young, J. R.; Bown, P. R.; Lees, J. A. (eds). Nannotax3 website. International Nannoplankton Association (2020 version). Available online at http://www.mikrotax.org/Nannotax3/. [details] current name source Young, J. R.; Bown, P. R.; Lees, J. A. (eds). Nannotax3 website. International Nannoplankton Association (2020 version). Available online at http://www.mikrotax.org/Nannotax3/. [details] extant flag source Young, J. R.; Bown, P. R.; Lees, J. A. (eds). Nannotax3 website. International Nannoplankton Association (2020 version). Available online at http://www.mikrotax.org/Nannotax3/. [details] habitat flag source Young, J. R.; Bown, P. R.; Lees, J. A. (eds). Nannotax3 website. International Nannoplankton Association (2020 version). Available online at http://www.mikrotax.org/Nannotax3/. [details] Unreviewed
Taxonomic remark emend. J.A. Lees & P.R. Bown, 2016 [details]Taxonomic remark From Nannotax3: Lees & Bown (2016) emended the order Braarudosphaerales to include the Nannoconaceae on the grounds that pentaliths and nannoconids both showed structures formed of multiple layers of thin elements. In the case of pentaliths these thin elements appear as laminae witin individual crystal units, in nannoconids they are stacked with offset, both groups appear at the end Jurassic and show tangential c-axis orientations as well as simple rotational symmetry, (without modification by central area structures or elongation into elliptical forms). Varol & Bowman (2019) have since shown that Polycyclolithus is a nannoconid, from side view observations with a mobile mount. Other possibly related taxa which show tangential c-axes and simple rotational symmetry but not stacked layers of elements include the Polycyclolithaceae and the genera Kokia, and Tegulalithus. These are now tentatively included here. [details] |
