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,


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

Search data:
Tagsnannolith-radiate, star-shaped,
CSPH: not known, V-UNITS: all, V-prominent, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 0->0µm; Segments: 6->6;
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:


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. (1967b). Middle Tertiary calcareous nannoplankton of the Cipero section, Trinidad, W.I. Tulane Studies in Geology and Paleontology. 5: 93-131. gs V O

Bukry, D. (1971b). 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 V O

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 V O

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

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 V O

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 V O

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

Perch-Nielsen, K. (1971c). 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. (1972b). Remarks on Late Cretaceous to Pleistocene coccoliths from the North Atlantic. Initial Reports of the Deep Sea Drilling Project. 12: 1003-1069. gs V O

Perch-Nielsen, K. (1977a). 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 V O

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 V O

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 V O

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 V O

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


Discoaster brouweri-like preservational morphotypes compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-9-2020

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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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