Taxonomy:
Distinguishing features: Hexagonal formed of 6 flat plates, each an eqiulateral triangle
Farinacci & Howe catalog pages: H. archus *
Search data:Tags | LITHS: nannolith-radiate, triangular, polygonal, CROSS-POLARS: T-prominent, |
Metrics | Lith size: 3->7µm; Segments: 6->6; Data source notes: lith size (diameter) from OD |
Geological Range:
Last occurrence (top): within NP21 zone (32.92-34.44Ma, top in Rupelian stage). Data source: Shamrock & Watkins 2012
First occurrence (base): within NP19-20 zone (34.44-36.97Ma, base in Priabonian stage). Data source: Shamrock & Watkins 2012
Plot of occurrence data:
Shamrock, J. L. & Watkins, D. K. (2012). Eocene calcareous nannofossil biostratigraphy and community structure from Exmouth Plateau, Eastern Indian Ocean (ODP Site 762). Stratigraphy. 9(1): 1-11. gsReferences:
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Hexadelus archus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-2-2021
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