Nannotax3 - ntax_cenozoic - Blackites herculesii

Citation: Blackites herculesii (Stradner, 1969) Bybell & Self-Trail, 1997

Basionym: Rhabdosphaera herculea Stradner, 1969

Synonyms:

Rhabdolithus solus Perch-Nielsen 1971 = Rhabdosphaera sola (Perch-Nielsen 1971) - this combination has been sed but may not have been validly proposed.

Taxonomic discussion: Similar to Blackites perlongus but with a broader spine.

Distinguishing features:
Parent taxon (B. inflatus group): Spine inflated with maximum width above base, many with conspicous bulge
This taxon: Rhabdolith with a broad, club-like (claviform) spine with width typically only slightly less than that of the coccolith. The spine displays a distinctive cross-hatched pattern and the outer surface may be serrated. The outer cycle of the coccolith rim is significantly smaller the inner.

Geological Range:
Last occurrence (top): within NP11 zone (53.70-54.17Ma, top in Ypresian stage). Data source: Bown 2005
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: Bown 2005

References:

Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs O

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs O

Bybell, L. & Self-Trail, J. (1997). Late Paleocene and Early Eocene calcareous nannofossils from three boreholes in an onshore-offshore transect from New Jersey to the Atlantic continental rise. Proceedings of the Ocean Drilling Program, Scientific Results. 150: 91-110. gs O

Müller, C. (1979). Calcareous nannofssils from the North Atlantic (Leg 48). Initial Reports of the Deep Sea Drilling Project. 48: 589-639. gs

Perch-Nielsen, K. (1971c). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs O

Perch-Nielsen, K., Sadek, A., Barakat, M. G. & Teleb, F. (1978). Late Cretaceous and Early Tertiary Calcareous nannofossil and Planktonic foraminifera zones from Egypt. Actes du VI Colloque Africain de Micropaléontologie - Tunis 1974. Annales des Mines et de la Géologie Tunissienne. 28: 337-403. gs

Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs

Steurbaut, E. (1990). Ypresian calcareous nannoplankton biostratigraphy and palaeogeography of the Belgian Basin. Bulletin de la Société Belge de Géologie. 97(1988): 251-285. gs

Stradner, H. (1969). The nannofossil of the Eocene Flysch in the Hagembach Valley (Northern Vienna woods), Austria. Rocznik Polskie Towarzystwo Geologiczne = Annales de la Société Géologique de Pologne. 39: 403-432. gs O

Blackites herculesii

References:

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