Nannoconus globulus


Classification: Mesozoic -> Braarudosphaerales -> Nannoconaceae -> Nannoconus -> N. kamptneri group -> Nannoconus globulus
Sister taxa: N. aquitanicus, N. boletus, N. bonetii, N. bronnimannii, N. bucheri, N. calpidomorphus, N. colomii, N. dauvillieri, N. dislocatus, N. globulus, N. kamptneri, N. oviformis, N. vocontiensis, N. wassallii, N. wintereri,

Distinguishing features: Squat, barrel-shaped to globular (similar height and width).


Daughter taxa: (blue => in age window 0-800Ma)
Large (>6µm in height)
Medium-sized (<6µm in height)

Taxonomy:

Citation: Nannoconus globulus subsp. globulus Brönnimann, 1955
Rank: Species

Farinacci & Howe catalog pages: Nannoconus globulus *

Distinguishing features: Squat, barrel-shaped to globular (similar height and width).


Morphology remarks: Globular to barrel-shaped (cylindrical with tapered ends) nannoconid with wide cavities and moderately thick walls. Cavities are two to three times the width of the wall.

Geological Range:
Last occurrence (top): within Aptian Stage (112.95-126.30Ma, top in Aptian stage). Data source: Perch-Nielsen 1985a
First occurrence (base): at base of NJT17b subzone (0% up, 145.5Ma, in Tithonian stage). Data source: Casellato 2010, fig16 - zonal marker

Plot of occurrence data:

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

    References:

    Brönnimann, P. (1955). Microfossils incertae sedis from the Upper Jurassic and Lower Cretaceous of Cuba. Micropaleontology. 1(28-51): -. gs

    Casellato, C. E. (2010). Calcareous nannofossil biostratigraphy of Upper Callovian - Lower Berriasian successions from the Souhern Alps, North Italy. Rivista Italiana di Paleontologia e Stratigrafia. 116(3): 357-404. gs

    Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs


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    Nannoconus globulus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-1-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10749 Go to Archive.is to create a permanent copy of this page - citation notes



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