Gartnerago segmentatum


Classification: Mesozoic -> Arkhangelskiales -> Kamptneriaceae -> Gartnerago -> Gartnerago segmentatum
Sister taxa: G. obliquum, G. segmentatum, G. costatum, G. diversum, G. stenostaurion, G. clarusora, G. chiasta, G. margaritatus, G. praeobliquum, G. coxalliae, G. nanum, G. ponticula, G. theta, G. sp.,

Distinguishing features: Similar to G. obliquum but rim broader, central area smaller.


Taxonomy:

Citation: Gartnerago segmentatum (Stover, 1966) Thierstein, 1974
Rank: Species
Basionym: Discolithus segmentatus Stover, 1966
Synonyms:
Notes & discussion: Poorly separated from G. obliquum and regarded as a junior synonym by some authors (see discussion in Thierstein 1974)

Farinacci & Howe catalog pages: Discolithus segmentatus * , Laffittius confossus * , Discolithus ornamentus *

Distinguishing features: Similar to G. obliquum but rim broader, central area smaller.

Search data:
TagsLITHS: placolith, elliptical, CA: plate, pores, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: rim-bicyclic,
MetricsLith size: 9->12µm;
Sources: original descriptions
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Late Maastrichtian Substage (66.04-69.91Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): at base of UC2a subzone (0% up, 98.3Ma, in Cenomanian stage). Data source: Burnett 1998 (zonal marker), fig.6.2

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: Gartnerago segmentatum, synonyms included - Arkhangelskiella concava; Discolithus ornamentus; Discolithus segmentatus; Gartnerago concavum; Gartnerago segmentatum; Laffittius confossus;
  • space-time plot :: Samples map :: Parent: Gartnerago

    References:

    Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles. 51 (Protista 2): 1-79. gs :: ::

    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs :: ::

    Caratini, C. (1963). Contribution à l'étude des coccolithes du Cénomanien supérieur et du Turonien de la région de Rouen. PhD thesis, Université d'Alger, Faculté des Sciences, Publication du Laboratoire de Géologique Appliquée. -. gs :: ::

    Hardas, P. & Mutterlose, J. (2008). Calcareous nannofossil assemblages of Oceanic Anoxic Event 2 in the equatorial Atlantic: Evidence of an eutrophication event. Marine Micropaleontology. 66: 52-69. gs :: ::

    Lees, J. A. & Bown, P. R. (2005). Upper Cretaceous calcareous nannofossil biostratigraphy, ODP Leg 198 (Shatsky Rise, Northwest Pacific Ocean). Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-60. gs :: view :: open

    Noël, D. (1969). Arkhangelskiella (coccolithes Crétacés) et formes affines du Bassin de Paris. Revue de Micropaléontologie. 11: 191-204. gs :: ::

    Stover, L. E. (1966). Cretaceous coccoliths and associated nannofossils from France and the Netherlands. Micropaleontology. 12: 133-167. gs :: ::

    Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 31(1): 39-56. gs :: view :: open

    Thierstein, H. R. (1974). Calcareous nannoplankton - Leg 26, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 26: 619-667. gs :: view :: open

    Wise, S. W. & Wind, F. H. (1977). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project. 36(269-491): -. gs :: view :: open

    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


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    Gartnerago segmentatum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-8-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10468 Go to Archive.is to create a permanent copy of this page - citation notes



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