Ceratolithus cristatus


Classification: ntax_cenozoic -> Nannolith families inc sed -> Ceratolithaceae -> Ceratolithus -> Ceratolithus cristatus
Sister taxa: C. cristatus, C. nishidae ⟩⟨ C. apiculus, C. armatus, C. atlanticus, C. larrymayeri, C. separatus, C. sp.

Daughter taxa: (blue => in age window 0-800Ma)
Ceratolithus cristatus CER
typical variety, horseshoe-shaped
Ceratolithus cristatus HET
Ceratolithus heterococcoliths with wide central opening
Ceratolithus cristatus HET hoops type
delicate hoop-coccoliths produced by Ceratolithus

Taxonomy:

Citation: Ceratolithus cristatus Kamptner, 1950
Rank: Species

Distinguishing features: Ceratoliths horsehoe-shaped without rostrum. Heterococcoliths with broad central opening

Farinacci & Howe catalog pages: C. cristatus + *


Morphology:
Ceratolith nannoliths and two different heterococcolith types are produced during the life cycle of this coccolithophore.
Ceratoliths- horseshoe-shaped strongly birefringent nannoliths with c-axis perpendicular to length. Arms variable in length and in degree of keel development.
Planoliths - circular heterococcoliths with a single shield and open central area, surrounded by a collar/tube. Formed of a single cycle of crystal-units with sub-vertical c-axes (Young et al. 1998).
Hoop coccoliths - delicate hoop-shaped heterococcoliths which can occur as a coccosphere around ceratoiths or on the outside of planolith coccospheres.

Cultures: strains of this species are maintained in culture, for details see Roscoff culture collection.


Biology & life-cycles: A succession of observations (Alcober & Jordan 1997, Young et al. 1998, Cros et al. 2000, and Sprengel & Young 2000, Archontikis & Young 2020) have shown that the heterococcoliths are formed during an alternate life-cycle stage of Ceratolithus cristatus and so should not be regarded as discrete species.

Search data:
TagsLITHS: nannolith-other, asymmetric, horseshoe-shaped,
CSPH: equant, CROSS-POLARS: 1ou, T-prominent,
MetricsLith size: 0->0µm; Segments: 1->1;
Data source notes: RCC
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: On TimeScaleCreator charts the FO of C. cristatus has been recorded as "transition from Ceratolithus acutus to Ceratolithus rugosus"
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): at base of NN13 zone (0% up, 5.1Ma, in Zanclean stage). Data source: Young 1998

Plot of occurrence data:

References:

Alcober, J. & Jordan, R. W. (1997). An interesting association between Neosphaera coccolithomorpha and Ceratolithus cristatus (Haptophyta). European Journal of Phycology. 32: 91-93. gs V O

Cros, L., Kleijne, A., Zeltner, A., Billard, C. & Young, J. R. (2000b). New examples of holococcolith-heterococcolith combination coccospheres and their implications for coccolithophorid biology. In, Young, J. R. , Thierstein, H. R. & Winter, A. (eds) Nannoplankton ecology and palaeocology, Proceedings of the INA7 conference, Puerto Rico, February 2002. Marine Micropaleontology. 39(1-4): 1-34. gs

Kamptner, E. (1950). Über den submikroskopischen Aufbau der Coccolithen. Anzeiger der Österreichische Akademie der Wissenschaften, Mathematische-Naturwissenschafliche Klasse, Wien. 87: 152-158. gs

Sprengel, C. & Young, J. R. (2000). First direct documentation of associations of Ceratolithus cristatus ceratoliths, hoop-coccoliths and Neosphaera coccolithomorpha planoliths. In, Young, J. R. , Thierstein, H. R. & Winter, A. (eds) Nannoplankton ecology and palaeocology, Proceedings of the INA7 conference, Puerto Rico, February 2005. Marine Micropaleontology. 39(1-4): 39-41. gs

Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs V O

Young, J. R., Jordan, R. W. & Cros, L. (1998). Notes on nannoplankton systematics and life-cycles - Ceratolithus cristatus, Neosphaera coccolithomorpha and Umbilicosphaera sibogae. Journal of Nannoplankton Research. 20(2): 89-99. gs V O

Missing or ambiguous references: Archontikis & Young 2020;


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

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=253 Go to Archive.is to create a permanent copy of this page - citation notes



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