Solisphaera sp. Specimens which cannot be assigned to established species
Taxonomy:
Citation: Solisphaera Bollmann et al., 2006Taxonomic rank: genusType species: Solisphara emidasia Bollmann, Cortes, Kleijne, Østergaard & Young 2006Synonyms: Saturnulus - nomina nuda erroneously published in Young et al. 2003Taxonomic discussion: Placement in Rhabdosphaeraceae tentative
Distinguishing features: Parent taxon (Rhabdosphaeraceae): BCs planoliths with radial lath cycle and highly-variable axial structures. Often polymorphic and/or varimorphic This taxon: Coccoliths without radial lath cycle; coccosphere dome-shaped, polymorphic
Morphology: A distinctive group of small deep-photic coccolithophores, only recently described. The coccospheres are dome-shaped (athough usually collapsed) with three discrete coccolith types
domal-side body coccoliths (dBC) - body coccoliths located on the domed side of the coccosphere
planar-side body coccoliths (pBC) - body coccoliths located on the planar side of the coccosphere.
coronal coccoliths (CC) - coccoliths with a distinctive protrusion, that form a circular ring, or corona, around the coccosphere.
The coccoliths are typically elliptical planoliths with a narrow rim of a single cycle of rod-shaped elements surrounding central area of trapezoidal elements arranged in a single, radial cycle - this may support a range of protrusions. Size: Coccoliths very small (max dimension 1-3 µm)
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: Total of ranges of the species in this database First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Total of ranges of species in this database
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
Aubry, M. -P. & Kahn, A. (2007). New coccolithophores from the deep photic zone: Implications for evolutionary morphological convergence in the calcareous nannoplankton. Micropaleontology. 52(5): 411-431. gs
Bollmann, J., Cortes, M. Y., Kleijne, A., Østergaard, J. B. & Young, J. R. (2006). Solisphaera gen. nov. (Prymnesiophyceae), a new coccolithophore genus from the lower photic zone. Phycologia. 45(4): 465-477. 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
Solisphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-1-2025
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