Kamptnerius magnificus


Classification: ntax_mesozoic -> Arkhangelskiales -> Kamptneriaceae -> Kamptnerius -> Kamptnerius magnificus
Sister taxa: K. magnificus, K. sp.

Distinguishing features: Tiered placoliths with broad rim that has an asymmetric flange forming a wing and narrow central area spanned by a perforate plate. Typical kamptneriacean LM image with a narrow, dark outer-cycle; a diagnostic, bright median-cycle; a dark, inner-cycle; and a dark central area plate.


Taxonomy:

Citation: Kamptnerius magnificus Deflandre, 1959
Rank: Species
Synonyms: List from (according to Verbeek 1977, Hattner & Wise 1980)

Farinacci & Howe catalog pages: K. magnificus * , K. tabulatus * , K. magnificus sculptus * , K. pertusus * , K. punctatus + * , K. pseudopunctatus * , K. minimus * , K. percivalii * , K. granatus *

Distinguishing features: Tiered placoliths with broad rim that has an asymmetric flange forming a wing and narrow central area spanned by a perforate plate. Typical kamptneriacean LM image with a narrow, dark outer-cycle; a diagnostic, bright median-cycle; a dark, inner-cycle; and a dark central area plate.


Morphology: Kamptnerius magnificus shows considerable variation particularly in:,
  1. The development of the asymmetric rim flange - from forms in which the rim is somewhat broader on one side of the coccolith than the other, to ones in which this has been extended into a wing as large as the rest of the coccolith. These forms co-occur and may reflect varimorphism on the coccosphere (as occurs with modern Helicosphaera)
  2. Development of the central cross-structure - from forms with well-developed crosses to forms with none at all.
  3. Development of pores - from forms with no pores in the plate (i.e. between the rim and the central cross) to forms with many regularly arranged pores. The pores are not seen on overgrown specimens, so clearly can be lost due to diagenesis, but primary variation in pore number also probably occurred.
None of these types of variation have yet been shown to change though time, although it might be worthwhile to research this. Variation in pore number was the basis for distinguishing the forms K. punctatus and K. pertusus but this is not followed now since these pores are clearly readily lost during overgrowth.
Forms with a well-developed central cross have sometimes been distinguished as K. magnificus subsp. sculptus or K. sculptus, however, the descriptions and illustrations in Bukry 1969 suggest that he intended the name for forms with massive sculpted central area elements, and in the holotype specimen the central cross is missing. Also the combination K. sculptus (Bukry 1969) does not appear to have been formally proposed.

Search data:
TagsLITHS: placolith, asymmetric, elliptical, CA: ca_conjunct, plate, pores, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 6->20µm;
Data source notes: original descriptions
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: FAD in Turonian, UC6a in NE Europe (Burnett 1998)
Last occurrence (top): within Late Maastrichtian Substage (66.04-69.91Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): near base of UC1c subzone (10% up, 99.8Ma, in Cenomanian stage). Data source: Burnett 1998

Plot of occurrence data:

References:

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

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

Cepek, P. (1970). Zur Vertikalverbreitung von Coccolithen-Arten in der Oberkreide NW-Deutschlands. Geologisches Jahrbuch. 88: 235-264. gs

Cepek, P. (1978). Mesozoic calcareous nannoplankton of the Eastern North Atlantic, Leg 41. Initial Reports of the Deep Sea Drilling Project. 41: 667-687. gs V O

Crux, J. A. (1980). A biostratigraphical study of Upper Cretaceous nannofossils from South-east England and North France. PhD thesis, University College London. -. gs

Deflandre, G. (1959). Sur les nannofossiles calcaires et leur systématique. Revue de Micropaléontologie. 2: 127-152. gs

Forchheimer, S. (1972). Scanning electron microscope studies of Cretaceous coccoliths from the Köpingsberg Borehole No. 1, SE Sweden. Sveriges Geologiska Undersökning, Series C. #668, 65: 1-141. gs

Hattner, J. G. & Wise, S. W. (1980). Upper Cretaceous calcareous nannofossil biostratigraphy of South Carolina. South Carolina Geology. 24: 41-117. gs

Hoffmann, N. (1970c). Taxonomische Untersuchungen an Coccolithen aus der Kreide Norddeutchlands anhand elektronenmikroskopischer Aufnamen. Hercynia. 7(1-3): 163-198. gs V O

Mai, H., von Salis, K., Willems, H. & Romein, A. J. T. (1997a). Fossil coccospheres from the K/T boundary section from Geulhemmerberg, The Netherlands. Micropaleontology. 43(281-302): -. gs

Pospichal, J. J. & Wise, S. W. (1990b). Maestrichtian calcareous nannofossil biostratigraphy of Maud Rise ODP leg 113 sites 689 and 690, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 465-487. gs V O

Pospichal, J. J. & Wise, S. W. (1990a). Calcareous nannofossils across the K/T boundary, ODP hole 690C, Maud Rise, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 515-532. gs V O

Reinhardt, P. (1964). Einige Kalkflagellaten-Gattungen (Coccolithophoriden, Coccolithineen) aus dem Mesozoikum Deutschlands. Monatsberichte der Deutschen Akademie der Wissenschaften zu Berlin. 6: 749-759. gs V O

Romein, A. J. T., Willems, H. & Mai, H. (1996). Calcareous nannoplankton of the Geulhemmerberg K/T boundary section, Maastrichtian type area, the Netherlands. Geologie en Mijnbouw. 75: 231-238. gs

Stradner, H. (1963). New contributions to Mesozoic stratigraphy by means of nannofossils. Proceedings of the Sixth World Petroleum Congress. Section 1 Paper 4: 167-183. gs

Stradner, H., Aubry, M. -P. & Bonnemaison, M. (2010). Calcareous nannofossil type specimens in the collection of the Geological Survey of Austria: A taxonomic and stratigraphic update. Jahrbuch der Geologischen Bundesanstalt. 150(1-2): 9-84. gs V O

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

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

Verbeek, J. W. (1977). Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, southern Spain and France. Utrecht Micropaleontological Bulletin. 16: 1-157. gs V O

Wind, F. H. & Wise, S. W. (1983). Correlation of upper Campanian-lower Maestrichtian calcareous nannofossil assemblages in drill and piston cores from the Falkland Plateau, southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 551-563. gs V O

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 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


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Kamptnerius magnificus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-12-2020

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