Variants: Syracosphaera operculata Kleijne & Cros 2009 - BC rim wider
Distinguishing features: Parent taxon (laminated type): XCs consist partly or entirely of several layers of superposed elements. CFCs with spines This taxon: XCs solid, no openings
Morphology: XCs - rounded, asymmetric, trigonal planoliths (2.5-3.5 µm).; proximal face flat, hint of circular central area; distal face with mass of laminae, one margin extended and denticulate. BCs - elliptical, small (1.5-2.5 µm); low flaring rim, proximal flange only, radial cycle defines ring of marginal pores. CFCs -similar to BCs but with short, pointed, spine Size: Coccospheres 6-8 µm.
Lith size: 1.5->2µm; Coccosphere size: 6->8µm; Liths per sphere: 40->44 Data source notes: lith length (BCs) from OD & illustrated specimens; csph data from Cros & Fortuño 2003;
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range: Last occurrence (top): Extant. Data source: present in the plankton (Young et al. 2003) First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: [JRY rough estimate]
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: laminated type
References:
Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs
Heimdal, B. R. & Gaarder, K. R. (1981). Coccolithophorids from the northern part of the eastern central Atlantic II. Heterococcolithophorids. “Meteor” Forschungsergebnisse. 33: 37-69. gs
Kleijne, A. & Cros, L. (2009). Ten new extant species of the coccolithophore Syracosphaera and a revised classification scheme for the genus. Micropaleontology. 55(5): 425-462. gs
Kleijne, A. (1993b). Morphology, Taxonomy and distribution of extant coccolithophorids (Calcareous nannoplankton). PhD Thesis, Vrije Universiteit Amsterdam. 1-321. gs
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
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. S1: 1-132. gs
Syracosphaera reniformis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-5-2025
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