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Syracosphaera pulchra HOL oblonga type

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Cenozoic Taxa

Syracosphaera pulchra HOL oblonga type

Edited by Lyndsey on Thu, 10/03/2011 - 14:58

Syracosphaera pulchra Lohmann 1902 HOL oblonga type

Description: 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.

Remarks:

Original description:

Syracosphaera pulchra 080019.jpgSyracosphaera pulchra 080020.jpg



Size: Liths 2-3 µm long.

Life-cycle association: 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).

Fossil record: Can be common in well-preserved Quaternary sediments (Crudeli et al. 2006).

Synonym: Calyptrosphaera oblonga Lohmann 1902

Sy_pulHOLob_117-83.JPGSy_pulHOLob_126-48.JPGCalyptrosphaeraA.JPGCalyptrosphaeraC .JPGCalyptrosphaeraB.JPG

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