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Watznaueria

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Journal Article
Journal: Paleobiology
Published: 24 April 2015
Paleobiology (2015) 41 (3): 415–435.
... at that time. Concerning coccolithophorids, this interval witnesses the diversification and expansion of the most successful Mesozoic genus: Watznaueria . In this study, we explore the potential environmental, ecological, and biological forcing at the origin of Watznaueria diversification and its effect...
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Journal Article
Published: 01 October 2008
American Mineralogist (2008) 93 (10): 1670–1677.
... of two living coccoliths, E. huxleyi and Gephyrocapsa oceanica , which are genetically very close and belong in the Isochrysidales clade (e.g., Edvardsen et al. 2000 ; Fujiwara et al. 2001 ; Sáez et al. 2004 ), and a fossil coccolith, Watznaueria barnesiae ( Black and Barnes 1959 ), which...
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Smear slide of facies 2 showing a  <b>Watznaueria</b> barnesiae  calcareous nannof...
Published: 29 May 2020
Fig. 17.— Smear slide of facies 2 showing a Watznaueria barnesiae calcareous nannofossil exhibiting advanced diagenetic alteration including breakage (red circle).
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FIGURE 5 —XY plots of the dissolution-resistant taxa  <b>Watznaueria</b> barnesiae...
in > PALAIOS
Published: 01 December 2008
FIGURE 5 —XY plots of the dissolution-resistant taxa Watznaueria barnesiae and W. fossacincta versus species richness and absolute abundances. A) Deep Sea Drilling Project (DSDP) Hole 534A. B) DSDP Hole 603B. Absolute abundance is in individuals per gram sediment
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A  Sketch showing the distribution of the coccolith  <b>Watznaueria</b> barnesae  ...
Published: 01 July 2008
F igure 2. A Sketch showing the distribution of the coccolith Watznaueria barnesae within the rectangular frame ( A ) of the agglutinated foraminifera in Plate 3, Figure 9 . Black lines mark zones of dissolution. B Empty spaces between coccoliths (shown in black) make up about 1.8
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Plot of absolute abundance of calcareous nannofossils versus  <b>Watznaueria</b>  ...
Published: 01 July 2005
F igure 8. Plot of absolute abundance of calcareous nannofossils versus Watznaueria spp./ Micula spp. in percentage of the total assemblage for the Kronsmoor section (left-hand side). Plot of species richness of calcareous nannofossils versus Watznaueria spp./ Micula spp. in percentage
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Vertical distribution of nannoconids,  <b>Watznaueria</b> barnesae  and nannofossi...
Published: 01 May 2001
Figure 7. Vertical distribution of nannoconids, Watznaueria barnesae and nannofossil species diversity in the Coppitella section plotted against the stratigraphic column, with calcareous nannofossil and planktonic foraminiferal biostratigraphy. The sharp decrease in abundance of nannoconids
Journal Article
Journal: PALAIOS
Published: 01 May 2011
PALAIOS (2011) 26 (5): 298–313.
..., with Watznaueria , Zeugrhabdotus , Biscutum , and Prediscosphaera the most common taxa. The most remarkable change in assemblage composition through the OAE2 is the decrease of Biscutum spp. Low abundances of Biscutum , combined with elevated numbers of Watznaueria spp. and/or Polycyclolithaceae, indicate reduced...
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Journal Article
Journal: PALAIOS
Published: 01 October 2015
PALAIOS (2015) 30 (10): 728–742.
... paleoenvironment, contain well-preserved and highly diverse calcareous nannofossil assemblages yielding 92 species. Based on the first occurrences of Eprolithus eptapetalus , Quadrum gartneri , and Eiffellithus eximius , both sections have been assigned an early Turonian age. The most common taxa are Watznaueria...
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Series: SEPM Special Publication, SEPM Special Publication
Published: 01 January 2009
DOI: 10.2110/sepmsp.091.121
EISBN: 9781565762961
... investigations focused on six taxonomic groups, such as Watznaueria barnesae, Micula spp., Boreal nannofossils, Tethyan nannofossils, Braarudosphaera bigelowii, and the calcareous dinoflagellate genus Thoracosphaera. The new data indicate constant δ 13 C values in the Upper Campanian and Lower...
Journal Article
Published: 01 July 2008
Journal of Foraminiferal Research (2008) 38 (3): 193–214.
...F igure 2. A Sketch showing the distribution of the coccolith Watznaueria barnesae within the rectangular frame ( A ) of the agglutinated foraminifera in Plate 3, Figure 9 . Black lines mark zones of dissolution. B Empty spaces between coccoliths (shown in black) make up about 1.8...
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Journal Article
Published: 01 October 2005
Micropaleontology (2005) 51 (4): 333–343.
... of nannofossil taxa which have proxy potential but which require focused study to determine the extent of their utility. Here, we point to the problems associated with some of the most commonly used Mesozoic nannofossil proxy taxa ( Watznaueria spp., Biscutum constans , Zeugrhabdotus erectus , Nannoconus spp...
Journal Article
Published: 01 March 2002
Bulletin de la Société Géologique de France (2002) 173 (2): 171–184.
..., Triscutum tiziense, Watznaueria contracta, whose FO is early Aalenian. The petrographic study evidences that sandstones have two compositional groupings : a quartzose (quartzarenite to sub-litharenite) petrofacies of the continental redbeds (Verrucano), and a quartzo-feldspathic (feldspathic quartz-arenite...
Journal Article
Published: 01 January 2002
Micropaleontology (2002) 48 (1): 31–52.
... Perch-Nielsen 1984 is also nonsynchronous, appearing in the deep ocean before its FO in neritic waters. The last occurrence (LO) of L. praequadratus Roth 1978 is diachronous across paleodepth, going locally extinct first in deeper water. The LO of Watznaueria bybelliae Self-Trail 1999 is also...
Journal Article
Published: 01 September 1999
Journal of Paleontology (1999) 73 (5): 952–963.
...Jean M. Self-Trail Abstract One new calcareous nannofossil genus Senilatus; four new calcareous nannofossil species Calculites favosus, Lithraphidites? charactozorro Self-Trail and Pospichal, Rucinolithus oriens, and Watznaueria bybelliae; and one new combination, Senilatus zipperum n. gen...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1984
AAPG Bulletin (1984) 68 (4): 538.
... probably unsuitable for large populations due to environmental instability. Evidence indicates that Watznaueria barnasae was the most ecologically tolerant form. The upper time slice (HL-3 bentonite) samples the nannofossil distributions at a point at or near the maximum transgression of the Greenhorn Sea...
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Calcareous nannofossils photographs from Cabo-Mondego (CM) and Chaudon-Nora...
Published: 24 April 2015
specimen); 13. Retecapsa incompta CN1680; 14. Carinolithus magharensis CM26; 15. Calyculus sp. CN260; 16. Watznaueria fossacincta CM62; 17. Watznaueria colacicchii CN200; 18. Watznaueria contracta CM26; 19. Watznaueria aff. contracta CM17; 20. Watznaueria
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Middle to Upper Jurassic calcareous nannofossils from core samples in onsho...
in > GeoArabia
Published: 01 October 2015
, XPL, Well B, 14,389.50 ft, Dhruma Formation; (6) Watznaueria barnesae , XPL, Well B, 14,168.50 ft, Najmah Formation; (7) Watznaueria barnesae , XPL, Well K, 10,445.00 ft, Jubaila Formation; (8) Watznaueria britannica , XPL, Well K, 10,445.00 ft, Jubaila Formation; (9) Watznaueria
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A: Relative abundance of small taxa (  Biscutum costans  ,   Discorhabdus r...
in > Geology
Published: 01 September 2009
Figure 2 A: Relative abundance of small taxa ( Biscutum costans , Discorhabdus rotatorius , and Zeugrhabdotus erectus ) and of Watznaueria barnesiae . B: Absolute abundance of W. barnesiae .
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Nannofossil associations in the LBFb Unit               LBFb    Sample  Abu...
Published: 01 February 2018
, Lithraphidites carniolensis, Micrantholithus hoschulzii, Micrantholithus obtusus, Nannoconus sp., Nannoconus steinmannii, Retecapsa angustiforata, Watznaueria spp. , Zeugrhabdotus embergeri late Valanginian – early Hauterivian CC3-CC4 p.p. GR22 F B Assipetra infracretacea, Calcicalathina oblongata