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Helicosphaera carteri

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Polymorphism in other motile coccolithophores  1  <span class="search-highlight">Helicosphaera</span> <span class="search-highlight">carteri</span>  sh...
Published: 01 October 2005
PLATE 3 Polymorphism in other motile coccolithophores 1 Helicosphaera carteri showing varimorphism, the coccoliths surrounding the flagellar opening (top left) are larger and have more strongly developed wings than those on the rest of the coccosphere, but they do not differ in anyway from
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- Selected photomicrographs of calcareous nannofossils observed in the stra...
Published: 01 February 2024
Fig. 5 - Selected photomicrographs of calcareous nannofossils observed in the stratigraphic sections of the study area, XPL= cross-polarized image. PPL=plane-polarized image (scale bar 5 microns). a.-b. Sphenolithus heteromorphus , 0° (a) and 45° (b), XPL; c. Helicosphaera carteri , XPL; d.-f
Journal Article
Published: 01 December 2004
Micropaleontology (2004) 50 (Suppl_1): 35–43.
... and Florisphaera profunda, measurements have been made on Calcidiscus leptoporus, Gephyrocapsa oceanica, Helicosphaera carteri and Syracosphaera pulchra. This study strongly reinforces the previous conclusion that size calibrations are essential for reliable results, i.e. that the superficially attractive...
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Calcareous nannoplankton from the Slanci section with indicated sample numb...
Published: 01 February 2019
Fig. 6.— Calcareous nannoplankton from the Slanci section with indicated sample numbers. A ) Helicosphaera carteri , 13. B ) Holodiscolithus macroporus , 13. C ) Cyclicargolithus floridanus , 13. D ) Umbilicosphaera jafari , 13. E ) Helicosphaera walbersdorfensis , 13. F ) Coccolithus
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Calcareous nannofossils microphotographs (all specimens × 2500): 1)  Spheno...
Published: 01 October 2010
Plate 1 Calcareous nannofossils microphotographs (all specimens × 2500): 1) Sphenolithus predistentus (sample MDE15, Alberosa Member); 2–3) Reticulofenestra bisecta (sample MDE13, Alberosa Member); 4–5) Triquetrorhabdulus milowii (sample MDE27, Alberosa Member); 6–8) Helicosphaera carteri
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Biostratigraphy of Torrente Carigiola non-reset samples (%).         Sample...
Published: 13 March 2017
Table 4. Biostratigraphy of Torrente Carigiola non-reset samples (%). Sample TCG1-BIO TCG-SUB-UP TCG-SUB-DOWN TCG-SUB-3 TCG3-BIO TCG4-BIO TCG4-BIO-BIS Counted helicoliths VR-NC 30 30 30 30 30 VR-NC Helicosphaera carteri (%) 0 0 30 20 20 15 0
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Estimates (crosses) of the weight of a specimen for each of the following s...
Published: 01 October 2005
TEXT-FIGURE 4 Estimates (crosses) of the weight of a specimen for each of the following species ( Helicosphaera carteri, Calcidiscus leptoporus, Gephyrocapsa oceanica, Syracospheara spp , and Emiliania huxleyi ) from 90 orientations of the coccoliths ranging from 0° to 90° from the polarizing
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SEM micrographs of  Ammolagena clavata  from sample B321 (scale bar = 50 μm...
Published: 01 July 2013
(white arrow). 2 : a, artificially broken specimen; b, c, detail of the tube aperture, in which an entire coccosphere of Helicosphaera carteri (Wallich) is present.
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( a ) Calcareous breccia (including chert clasts) at the base of the Colle ...
Published: 01 December 2007
) Helicosphaera carteri (nannoplankton) from Miocene metapelites (Scisti del Fiume Lao Fm, Alberosa area). ( e ) Stratigraphic contact between Colle Trodo and Scisti del Fiume Lao Fms (Alberosa area). ( f ) Geological section across the Alberosa area. In this area, the stratigraphic relationships between
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Mean composition of the coccolithophore assemblages and average coccolith f...
Published: 23 December 2015
. 2002 ). E. hux, Emiliania huxleyi ; C. lepto, Calcidiscus leptoporus ; G. oce, Gephyrocapsa oceanica ; C. pela, Coccolithus pelagicus ; F. prof., Florisphaera profunda ; H. car, Helicosphaera carteri . The species are always in the same order (clockwise) arranged (corresponding to the key first
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(A) Factor analysis biplot for the Mira estuary (Portugal) records. Defined...
Published: 25 November 2020
bigelowii ; CL— Calcidiscus leptoporus ; CM— Coronosphaera mediterranea ; CP— Coccolithus pelagicus spp. braarudii ; GM— Gephyrocapsa muellerae ; GO— Gephyrocapsa oceanica ; HC— Helicosphaera carteri ; Sy— Syracosphaera spp.; US— Umbilicosphaera sibogae . (B) Ideal atmospheric and oceanic conditions
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Most significative specimens of calcareous nannofossils recognized in the s...
Published: 01 June 2009
Fig. 8 Most significative specimens of calcareous nannofossils recognized in the studied samples. XP=Cross-polarized light, NL=normal light. Principali specie di nannofossili calcarei riconosciuti nei campioni studiati XP=Nicol incronciati, NL=Nicol paralleli: (a) Helicosphaera carteri XP
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Photomicrographs of selected calcareous nannofossils from Site U1457. A 5 µ...
Published: 10 April 2019
Fig. 6. Photomicrographs of selected calcareous nannofossils from Site U1457. A 5 µm scale bar is shown next to the first image. (1–4) Ceratolithus cristatus ; (5) Reticulofenestra pseudoumbilicus ; (6) R. pseudoumbilicus (5–7 µm); (7, 8) Helicosphaera carteri ; (9) Pontosphaera japonica
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Calcareous nannofossil taxa and diatom fragments from Rocchetta Sant’Antoni...
Published: 01 June 2017
Fig. 11 Calcareous nannofossil taxa and diatom fragments from Rocchetta Sant’Antonio (ROC) and San Bartolomeo (SBA) samples. XP: crossed polarized light; PL: plane polarized light. Scale bar = 10 μm. 1 - Sphenolithus heteromorphus Deflandre. ROC, 1a: XP 0°, 1b: XP 45°. 2 - Helicosphaera
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Light micrographs of calacreous nannofossils. The sample number, where K30=...
Published: 01 June 2012
-81. Figure 12. Helicosphaera ampliaperta Bramlette & Wilcoxon 1967 . Sample K30-63. Figure 13. Helicosphaera carteri (Wallich 1877) Kamptner 1954. Sample K30-43. Figure 14. Helicosphaera scissura Miller 1981. Sample K30-63. Figure 15. Pontosphaera multipora (Kamptner 1948) Roth 1970
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Light microscope micrographs of calcareous nannofossils. XP = cross polariz...
Published: 01 March 2002
. walbersdorfensis Müller. Cap 68, 102.44 m, XP, 45° Q) Discoaster musicus Stradner. Cap 44, 92.15 m, Ph. R) Helicosphaera carteri (Wallich) Kamptner. Cap 26, 57.50 m, XP, 0° S, T) Discoaster spp. (6 rays). Cap 26, 57.50 m, Ph, low focus (S) and Ph, high focus (T). U, V) Helicosphaera ampliaperta
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Calcareous nannoplankton microphotographs (light microscope). 1–2 :  Helico...
Published: 01 November 2010
P late . I. – Calcareous nannoplankton microphotographs (light microscope). 1–2 : Helicosphaera scissura M iller , 1981; 1 : crossed nicols; 2 : transmitted light; Sample FB04. 3–4 : Helicosphaera carteri (W allich , 1877) K amptner , 1954; 3 : crossed nicols; 4 : transmitted light; Sample
Journal Article
Published: 01 January 2003
Micropaleontology (2003) 49 (1): 1–26.
... in the Mediterranean. The abundance of different species of the genus Helicosphaera, including the Helicosphaera carteri (Wallich 1877) Kamptner 1954 group, Helicosphaera intermedia Martini 1965, Helicosphaera orientalis Black 1971, Helicosphaera pacifica Müller and Brönnimann 1974, Helicosphaera...
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Journal Article
Journal: Palynology
Published: 01 June 2012
Palynology (2012) 36 (1): 38–79.
...-81. Figure 12. Helicosphaera ampliaperta Bramlette & Wilcoxon 1967 . Sample K30-63. Figure 13. Helicosphaera carteri (Wallich 1877) Kamptner 1954. Sample K30-43. Figure 14. Helicosphaera scissura Miller 1981. Sample K30-63. Figure 15. Pontosphaera multipora (Kamptner 1948) Roth 1970...
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Series: Geological Society, London, Special Publications
Published: 01 January 2003
DOI: 10.1144/GSL.SP.2003.216.01.31
EISBN: 9781862394643
... with the following association: Coccolithus pelagicus, Coronocyclus nitescens, Cyclicargolithus abisectus, Discoaster deflandrei, D. exilis, Helicosphaera ampliaperta, H. carteri, H. Perchnielseniae, H. euphratis, Reticulofenestra pseudoumbilica, Sphenolithus belemnos, S. heteromorphus . Early Miocene (zone NN3...
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