Discoaster brouweri-like preservational morphotypes


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. brouweri group -> Discoaster brouweri-like preservational morphotypes
Sister taxa: D. triradiatus, D. tamalis, D. asymmetricus, D. brouweri, D. altus, D. calcaris, D. braarudii, D. neorectus, D. dennei, D. formosus, D. pliostellulus, D. brouweri-like preservational morphotypes,

Taxonomy:

Citation: Discoaster aster, and other preservational species of discoaster
Rank: informal
Variants: Throughout the Neogene, discoasters can be found with blunt ray terminations, but otherwise similar morphology to co-occurring well-formed discoasters. The blunt ray-tip specimens have probably been produced both by diagenetic alteration and by original growth variation. Various species have been described to include these specimens including: These species have no real value and it is more sensible to assign these specimens to an explicit category such as “unidentifiable 6-rayed discoaster”.
NB Of these D. adamanteus is a relatively widely used name, appied to short rayed discoasters which have been heavily overgrown so that they show crystallographic calcite faces on most surfaces.
Discoaster braarudii is a suitable name for flat 6-rayed discoasters without bifurcations.
Similar Palaeogene taxa

Distinguishing features: poorly preserved 6-rayed discoasters without bifurcations

Farinacci & Howe catalog pages: Discoaster adamanteus * , Discoaster andamanensis * , Discoaster argutus * , Discoaster aster * , Discoaster capricornensis * , Discoaster chambrayensis * , Discoaster formosus * , Discoaster gillii * , Discoaster intercalaris * , Discoaster lautus * , Discoaster minutus * , Discoaster obtusus * , Discoaster plebeius * , Discoaster raoi * , Discoaster rhomboida * , Discoaster rufus * , Discoaster rugosus * , Discoaster stella * , Discoaster stella discula * , Discoaster stellulus * , Discoaster tokerae * , Discoaster toralus * , Discoaster zammitmaempeli * , Discoaster crassus * , Discoaster geometricus * , Discoaster incomptus * , Discoaster levini * , Discoaster lingfengensis * , Discoaster triangularis *

Search data:
TagsLITHS: nannolith-radiate, star-shaped,
CSPH: not known, V-UNITS: all, V-prominent, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 0->0µm; Segments: 6->6;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN18 zone (1.93-2.39Ma, top in Gelasian stage). Data source: Young 1998
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: rough estimate

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Discoaster brouweri-like preservational morphotypes, synonyms included - Discoaster adamanteus; Discoaster adamentus; Discoaster aff. brouweri; Discoaster aff. calcaris; Discoaster andamanensis; Discoaster formosus; Discoaster intercalaris; Discoaster lingfengensis; Discoaster obtusus; Discoaster sp. cf. D. adamanteus; Discoaster sp. cf. D. brouweri; Discoaster sp. cf. D. calcaris; Discoaster sp. cf. D. neorectus; Discoaster sp. cf. intercalaris; Discoaster stellulus; Discoaster toralis; Discoaster toralus; Discoaster brouweri–like preservational morphotypes;
  • space-time plot :: Samples map :: Parent: D. brouweri group

    References:

    Bramlette, M. N. & Riedel, W. R. (1954). Stratigraphic value of discoasters and some other microfossils related to Recent coccolithophores. Journal of Paleontology. 28: 385-403. gs :: ::

    Bramlette, M. N. & Wilcoxon, J. A. (1967). Middle Tertiary calcareous nannoplankton of the Cipero section, Trinidad, W.I. Tulane Studies in Geology and Paleontology. 5: 93-131. gs :: view :: open

    Bukry, D. (1971). Cenozoic calcareous nannofossils from the Pacific Ocean. San Diego Society of Natural History Transactions. 16: 303-327. gs :: ::

    de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs :: view :: open

    de Kaenel, E., Bergen, J. A., Browning, E., Blair, S. A. & Boesiger, T. M. (2017). Uppermost Oligocene to Middle Miocene Discoaster and Catinaster taxonomy and stratigraphy in the circum North Atlantic Basin: Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research. 37(2-3): 215-244. gs :: view :: open

    Ellis, C. H., Lohman, W. H. & Wray, J. L. (1972). Upper Cenozoic calcareous nannofossils from the Gulf of Mexico (Deep Sea Drilling Project, Leg 1, Site 3). Colorado School of Mines Quarterly. 67: 1-103. gs :: ::

    Gartner, S. (1967). Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. Paleontological Contributions, University of Kansas. 29: 1-7. gs :: ::

    Hay, W. W., Mohler, H. P., Roth, P. H., Schmidt, R. R. & Boudreaux, J. E. (1967). Calcareous nannoplankton zonation of the Cenozoic of the Gulf Coast and Caribbean-Antillean area, and transoceanic correlation. Transactions of the Gulf Coast Association of Geological Societies. 17: 428-480. gs :: ::

    Hojjatzadeh, M. (1978). Discoasters of the Blue Clay (Middle Miocene) of Malta and Gozo. Geological Magazine. 115(1): 1-19. gs :: ::

    Martini, E. & Worsley, T. (1971). Tertiary calcareous nannoplankton from the western equatorial Pacific. Initial Reports of the Deep Sea Drilling Project. 7: 1471-1507. gs :: view :: open

    Müller, C. (1974). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. gs :: ::

    Perch-Nielsen, K. (1971). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs :: ::

    Perch-Nielsen, K. (1972). Remarks on Late Cretaceous to Pleistocene coccoliths from the North Atlantic. Initial Reports of the Deep Sea Drilling Project. 12: 1003-1069. gs :: view :: open

    Perch-Nielsen, K. (1977). Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39: 699-823. gs :: view :: open

    Rade, J. (1977). Tertiary biostratigraohic zonation based on calcareous nannoplankton in eastrn Australian nearshore basins. Micropaleontology. 23(3): 270-296. gs :: ::

    Roth, P. H. (1970). Oligocene calcareous nannoplankton biostratigraphy. Eclogae Geologicae Helvetiae. 63: 799-881. gs :: view :: open

    Singh, P. P. & Vimal, K. P. (1976). Late Miocene-early Pliocene Discoaster from Neill Island, South Andaman. Journal of the Geological Society of India. 17(1): 37-44. gs :: ::

    Theodoridis, S. (1984). Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32: 1-271. gs :: ::

    Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs :: view :: open

    Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs :: ::


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    Discoaster brouweri-like preservational morphotypes compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=458 Go to Archive.is to create a permanent copy of this page - citation notes



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