Blackites piriformis


Classification: Coccolithophores -> Syracosphaerales -> Rhabdosphaeraceae -> Blackites -> B. inflatus group -> Blackites piriformis
Sister taxa: B. aktulagayensis, B. bullatus, B. creber, B. culter, B. flammeus, B. fustis, B. gladius, B. globosus, B. herculesii, B. inflatus, B. kilwaensis, B. ornatus, B. piriformis, B. pseudomorionum, B. rotundus, B. rugosus, B. sextonii, B. turritus, B. virgatus,

Distinguishing features: Rhabdoliths with a wide, hollow, ampulliform spine that broadens rapidly to a maximum width and then tapers to a narrow upper portion; the inflated part of the spine displays a distinctive cross-hatched pattern and the outer surface is serrated. The spine is much taller (x 3) and wider than the coccolith.


Taxonomy:

Citation: Blackites piriformis (Pavsic in Khan et al., 1975) Aubry, 1999
Rank: Species
Basionym: Rhabdosphaera piriformis Pavsic in Khan et al., 1975

Farinacci & Howe catalog pages: Rhabdosphaera piriformis *

Distinguishing features: Rhabdoliths with a wide, hollow, ampulliform spine that broadens rapidly to a maximum width and then tapers to a narrow upper portion; the inflated part of the spine displays a distinctive cross-hatched pattern and the outer surface is serrated. The spine is much taller (x 3) and wider than the coccolith.

Search data:
TagsLITHS: planolith, elliptical, CA: grill, PROCESS: bulbous, hollow, spine,
CSPH: not known, DETAILS: ca_disjunct,
MetricsLith size: 10->15┬Ám;
Sources: lith size (spine height) from illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP14b subzone (46.29-47.84Ma, base in Lutetian stage). Data source: Bown 2005

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: B. inflatus group

    References:

    Aubry, M.-P., (1999). Handbook of Cenozoic calcareous nannoplankton. Book 5: Heliolithae (Zygoliths and Rhabdoliths). Micropaleontology Press, American Museum of Natural History, New York, 368 pp.GS

    Bown, P.R., (2005). 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

    Khan, M.R.; Pavlovec, R. & Pavsic, J., (1975). Eocene microfossils from Podgrad. Geologija, 18: 9-60.GS


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    Blackites piriformis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-2-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=115 Go to Archive.is to create a permanent copy of this page - citation notes



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