Nannotax3 - ntax_cenozoic - Scyphosphaera apsteinii HOL

Citation: Scyphosphaera apsteinii Lohmann, 1902 HOL

Synonyms:

Holodiscolithus macroporus (Deflandre 1954) Roth 1970 is the name usually given to similar fossil forms, at least some of which are almost certainly Scyphosphaera holococcoliths
Discolithus macroporus (Deflandre 1954) - basionym of H. macroporus
Syracolithus schilleri (Kamptner 1927) Loeblich & Tappan 1967 - name widely used in modern literature until the life cycle association with Scyphosphaera apsteinii was recognised.
Syracosphaera schilleri Kamptner 1927 - basionym of S. schilleri

Distinguishing features:
Parent taxon (septate): Holococcoliths with tube, open distally and subdivided internally by vertical septae
This taxon: Liths similar to quadriperforatus but larger (3-4 µm), with more pores (8-20) and lacking castellations; single irregular boss near centre of lith.

LM observations show that the ultrastructure is similar to that of Calcidiscus leptoporus ssp. quadriperforatus HOL. In comparison to quadriperforatus holococoliths the liths are larger (3-4 µm), have more pores (8-20) and a better-developed double wall - outer layer with radial c-axes, inner layer formed by extension of septae so with vertical c-axes.

A single, unambiguous, combination coccosphere with Scyphosphaera apsteinii was described and illustrated by Frada et al. (2009) from the North Atlantic.

Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within Eocene Epoch (33.89-55.96Ma, base in Ypresian stage). Data source: [JRY rough estimate]

References:

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

Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gs

Frada, M., Percopo, I., Young, J. R., Zingone, A., de Vargas, C. & Probert, I. (2009). First observations of heterococcolithophore-holococcolithophore life cycle combinations in the family Pontosphaeraceae (Calcihaptophycideae, Haptophyta). Marine Micropaleontology. 71(1): 20-27. gs

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 O

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

Roth, P. H. (1970). Oligocene calcareous nannoplankton biostratigraphy. Eclogae Geologicae Helvetiae. 63: 799-881. gs O

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., 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 V O

Scyphosphaera apsteinii HOL

References:

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