Syracosphaera pulchra HOL oblonga type


Classification: ntax_cenozoic -> Holococcoliths -> convex -> Syracosphaera pulchra HOL oblonga type
Sister taxa: C. sphaeroidea HOL, S. pulchra HOL oblonga type, S. pulchra HOL pirus type, C. divergens, C. galea, C. sp. cf. heimdaliae ⟩⟨ C. heimdaliae, C. radiata, Flosculosphaera, Gliscolithus

Taxonomy:

Citation: Syracosphaera pulchra Lohmann, 1902 HOL oblonga type, sensu Young et al., 2003
Rank: Species
Synonyms: Calyptrosphaera oblonga Lohmann 1902

Distinguishing features: Tube merges into cover; hexagonal mesh fabric

Farinacci & Howe catalog pages: C. oblonga *


Morphology: Coccolith structure - dome-shaped, formed of layer of crystallites in hexagonal array with the crystalographic c-axis perpendicular to the surface. In LM the rim is bright and cenral part dark.
Coccospheres weakly dimorphic, piriform.
Coccolith form - the coccoliths have simple dome-shaped, with wall showing heaxoganla mesh fabric. Circum-flagellar coccoliths more elevated and with pyramidal central boss.

Size: Liths 2-3 µm long.


Biology & life-cycles: The association of these holococcoliths with Syracosphaera pulchra has been demonstrated by observation of numerous combination coccospheres, Cros et al. (2000), Geisen et al. (2002). pirus-type holococcoliths also occur in assocaition with S. pulchra and this has been interpreted as result of pseudo-cryptic speciation (Geisen et al. 2002).

See also: Syracosphaera pulchra ;

Search data:
TagsLITHS: holococcolith, elliptical, hollow, CA: process, closed,
CSPH: elongated, CFC, CROSS-POLARS: V-prominent, R-prominent,
MetricsLith size: 1.8->2.8µm; Coccosphere size: 10->20µm; Liths per sphere: 50->180
Data source notes: morphom data from Yang & Wei (2003), Cros & Fortuño (2002) & Kleijne 1991
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Can be common in well-preserved Quaternary sediments (Crudeli et al. 2006).

Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: [JRY rough estimate]

Plot of occurrence data:

References:

Andruleit, H., Rogalla, U. & Staeger, S. (2005). Living coccolithophores recorded during the onset of upwelling conditions off Oman in the western Arabian Sea. Journal of Nannoplankton Research. 27(1): 1-14. gs V O

Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. 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

Crudeli, D. et al. (2006). Fossil record of holococcoliths and selected hetero-holococcolith associations from the Mediterranean (Holocene-late Pleistocene): evaluation of carbonate diagenesis, palaeoecological, and palaeoceanographic implications. Palaeogeography Palaeoclimatology Palaeoecology. 237: 191-212. gs

Geisen, M., Billard, C., Broerse, A. T. C., Cros, L., Probert, I. & Young, J. R. (2002a). Life-cycle associations involving pairs of holococcolithophorid species: intraspecific variation or cryptic speciation? European Journal of Phycology. 37: 531-550. gs V O

Lohmann, H. (1902). Die Coccolithophoridae, eine Monographie der Coccolithen bildenden Flagellaten, zugleich ein Beitrag zur Kenntnis des Mittelmeerauftriebs. Archiv für Protistenkunde. 1: 89-165. gs V O

Okada, H. & McIntyre, A. (1977). Modern coccolithophores of the Pacific and North Atlantic Oceans. Micropaleontology. 23(1): 1-55. gs

Reid, F. M. H. (1980). Coccolithophorids of the North Pacific Central Gyre with notes on their vertical and seasonal distribution. Micropaleontology. 26(2): 151-176. gs

Skejic, S. et al. (2018). Coccolithophore diversity in open waters of the middle Adriatic Sea in pre- T and post-winter periods. Marine Micropaleontology. 143(1): 30-45. gs

Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research, Special Issue. 1: 1-132. gs V O


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Syracosphaera pulchra HOL oblonga type compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-3-2021

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