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Neobiscutum

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Journal Article
Published: 01 January 2003
Micropaleontology (2003) 49 (2): 189-195.
...Hartmut Mai; Robert P. Speijer; Peter Schulte Abstract The calcareous nannofossil species Neobiscutum romeinii , N. parvulum, and Cruciplacolithus primus , are considered in modern zonation schemes as index species for the lowermost Paleocene. Our studies, however, reveal that they are consistently...
FIGURES
Journal Article
Published: 01 July 2000
Micropaleontology (2000) 46 (3): 277-283.
...Hartmut Mai Abstract The same specimens of Neobiscutum romeinii, Neobiscutum parvulum and Cruciplacolithus primus, with an average size of 2.0 mu m and deriving from the "type locality" of the Maastrichtian stage at ENCI quarry near Maastricht, The Netherlands, were documented both under the light...
Journal Article
Published: 01 September 1998
Bulletin de la Société Géologique de France (1998) 169 (5): 709-723.
...Silvia Gardin; Simonetta Monechi Abstract Calcareous nannofossil assemblages in four middle to low latitude Cretaceous/Tertiary boundary sections in different paleogeographic settings have been analysed. Correlation between the sections is based on the first occurrence of Neobiscutum romeinii, N...
Image
Brazos River , Texas, USA, Core 2, sample 1
 1  <b>Neobiscutum</b> romeinii , prox...
Published: 01 January 2003
PLATE 1 Brazos River , Texas, USA, Core 2, sample 1
 1 Neobiscutum romeinii , proximal 2.5μm
 2 Neobiscutum parvulum , distal 2.3μm
 3 Cruciplacolithus primus , proximal 3.3μm
 Antioch Church , Alabama, USA, Core, sample 40
 4 Neobiscutum romeinii , proximal 2.4μm
 5 Neobiscutum parvulum
Image
The results of the PDM for six nannofossil taxa that originated in the earl...
Published: 08 July 2014
Figure 8. The results of the PDM for six nannofossil taxa that originated in the early Paleogene: Coccolithus , Cruciplacolithus intermedius , Cr. primus , Futyania , Neobiscutum , and Prinsius . The histograms of all possible original first occurrences are shown for Shatsky Rise (light
Image
Figure 2. Abundances of principal survivor and incoming Cenozoic nannofossi...
in > Geology
Published: 01 August 2005
, Zeugrhabdotus sigmoides , Neobiscutum parvulum , Cruciplacolithus primus , Coccolithus pelagicus .
Image
Figure 1. Percentages of Cretaceous, survivor, and Cenozoic calcareous nann...
in > Geology
Published: 01 August 2005
) , and numbered bioevents are as follows: (1) presence of Micula prinsii ; (2) calcisphere abundance increases; (3) first occurrence of (FO) Neobiscutum ; (4) FO Cruciplacolithus primus ; (5) FO Cruciplacolithus intermedius ; (6) abundant Futyania petalosa .
Journal Article
Published: 01 September 2005
Micropaleontology (2005) 51 (3): 262.
... and Neobiscutum , while the elliptical outline and the flat monocyclic shields are reminiscent of Ellipsolithus . However the placoliths of Centumgemina differ markedly from those of Biscutu m, Neobiscutum and Ellipsolithus by the shape of the two shields and the lack of a central structure. In addition...
Image
Nonmetric multidimensional scaling (NMDS) ordinations of global nannoplankt...
in > Geology
Published: 06 June 2019
Pacific ( Bown, 2005 ); and ODP Site 1262C, Walvis Ridge, southern Atlantic ( Jiang et al., 2010 ). In B, species scores are for the following nannoplankton taxa: 1— Lanternithus spp.; 2— Neobiscutum spp.; 3— Chiastozygus ultimus; 4— Watznaueria barnesiae ; 5— Braarudosphaera spp.; 6— Cervisiella spp
Journal Article
Journal: Paleobiology
Published: 05 October 2015
Paleobiology (2015) 41 (4): 661-679.
... also contain orbital cycles providing precise time control. The few survivors of the event were rare Cretaceous taxa found mainly in shelf settings (Bown 2005 ). Two of these survivors, Neobiscutum and Cruciplacolithus primus, likely evolved at the end...
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Journal Article
Journal: Geology
Published: 01 August 2005
Geology (2005) 33 (8): 653-656.
... , Zeugrhabdotus sigmoides , Neobiscutum parvulum , Cruciplacolithus primus , Coccolithus pelagicus . ...
FIGURES
Journal Article
Journal: Geology
Published: 06 June 2019
Geology (2019) 47 (8): 753-756.
... Pacific ( Bown, 2005 ); and ODP Site 1262C, Walvis Ridge, southern Atlantic ( Jiang et al., 2010 ). In B, species scores are for the following nannoplankton taxa: 1— Lanternithus spp.; 2— Neobiscutum spp.; 3— Chiastozygus ultimus; 4— Watznaueria barnesiae ; 5— Braarudosphaera spp.; 6— Cervisiella spp...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2013
DOI: 10.1144/SP382.11
EISBN: 9781862396463
... and of the nannofossil Braarudosphaera bigelowii (Fig. 5 ). The FO of the nannofossil Neobiscutum parvulum succeeds Biantolithus sparsus , whose extinction occurs within the interval of peak abundance blooms of predominant species at that time, Thoracosphaera and Braarudosphaera bigelowii . In the present...
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Series: SEPM Special Publication
Published: 01 January 2011
DOI: 10.2110/sepmsp.100.157
EISBN: 9781565763098
... of Cretaceous species, although they are still sporadically present throughout this zone. In the CM sections, the first bloom of the survivor species Neobiscutum romeinii and B. bigelowii are recorded successfully near the base of this zone, while Cruciplacolithus primus (small, < 3.5 ìm) first...
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Series: GCSSEPM
Published: 01 December 2007
DOI: 10.5724/gcs.07.27.0211
EISBN: 978-0-9836096-3-6
... petalosa . Defined by the LO’s of Neobiscutum parvulum and Neobiscutum romeinii . Defined by the downhole abundance increases of Braarudosphaera bigelowii and N. romeinii . Defined by a dominance of a mixture of Maastrichtian and Campanian nannofossils. This layer is believed to have...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2416(12)
...— Lithraphidites quadratus Bramlette and Martini. In NTp1B: 1— Neobiscutum parvulum (Romein) Varol; 2— Neobiscutum romeinii (Perch-Nielsen) Varol; 3— Cruciplacolithus primus Perch-Nielsen; 4— Neocrepidolithus neocrassus (Perch-Nielsen) Romein; 5— Neocrepidolithus sp. cf. N. dirimosus (Perch-Nielsen) Perch...
Book Chapter

Series: SEPM Special Publication
Published: 01 January 2011
EISBN: 9781565763098
.... Neobiscutum romeinii , section CMB, sample 21. 30. Cruciplacolithus primus , section CMB, sample 23. Plate 1. Light-microscope photographs of species of calcareous nannofossils. All photographs were taken under cross-polarized light. All specimens are from the Cottonmouth Creek CMA, CMB, and CMC...
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Journal Article
Journal: Paleobiology
Published: 08 July 2014
Paleobiology (2014) 40 (4): 541-559.
...Figure 8. The results of the PDM for six nannofossil taxa that originated in the early Paleogene: Coccolithus , Cruciplacolithus intermedius , Cr. primus , Futyania , Neobiscutum , and Prinsius . The histograms of all possible original first occurrences are shown for Shatsky Rise (light...
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Journal Article
Journal: PALAIOS
Published: 01 April 2008
PALAIOS (2008) 23 (4): 185-194.
... involves the successive evolution of new taxa that bloom for short periods of time and disappear (e.g., species of Neobiscutum and Futuyania ; see Bown, 2005 ). Perhaps the most notable burst in origination took place 4–5 myr after the K-P extinction event with the first occurrences of two dominant...
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Series: Geological Society, London, Special Reports
Published: 01 January 2016
DOI: 10.1144/SR27.9
EISBN: 9781862397071