Sphenolithus calyculus


Classification: Coccolithophores -> Discoasterales -> Sphenolithaceae -> Sphenolithus -> S. heteromorphus group -> Sphenolithus calyculus
Sister taxa: S. heteromorphus, S. milanetti, S. preasii, S. belemnos, S. pseudoheteromorphus, S. conicus, S. calyculus, S. delphix, S. microdelphix, S. spinula,

Taxonomy:

Citation: Sphenolithus calyculus Bukry, 1985
Rank: Species
Synonyms: Sphenolithus elongatus Martini, 1986. (described independently from the same time interval)
Notes & discussion: One of the Late Oligocene Early Miocene group of delicate sphenoliths (see also S. capricornutus, S. delphix). Characterised by a single long apical spine, and a compact base, in contrast to the flaring base of S. delphix. It is smaller and thinner than S. heteromorphus.

Distinguishing features: Small sphenolith with long apical spine and compact base.

Farinacci & Howe catalog pages: Sphenolithus calyculus * , Sphenolithus elongatus Martini *

Search data:
TagsLITHS: nannolith-radiate, N: 3D-radiate, conical, circular, cylindrical, RIM: tiered, CA: process, PROCESS: length-fast, monocrystalline, spine,
CSPH: not known, V-UNITS: spine, V-prominent, R-UNITS: lower-tier, middle-tier, R-prominent, DETAILS: isogyres radial,
MetricsLith size: 5->9µm;
Sources: lith height from ODs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN2 zone (19.00-22.82Ma, top in Burdigalian stage). Data source: Bergen et al. 2017
First occurrence (base): within NP25 zone (24.40-26.84Ma, base in Chattian stage). Data source: Young 1998; Bergen et al. 2017

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Sphenolithus calyculus, synonyms included - Sphenolithus calyculus; Sphenolithus elongatus;
  • space-time plot :: Samples map :: Parent: S. heteromorphus group

    References:

    Bergen, J. A., de Kaenel, E., Blair, S. A., Boesiger, T. M. & Browning, E. (2017). Oligocene-Pliocene taxonomy and stratigraphy of the genus Sphenolithus in the circum North Atlantic Basin: Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research. 37(2-3): 77-112. gs :: view :: open

    Bown, P. R. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs :: view :: open

    Bukry, D. (1985). Mid-Atlantic Ridge coccolith and silicoflagellate biostratigraphy, Deep Sea Drilling Project Sites 558 and 563. Initial Reports of the Deep Sea Drilling Project. 82: 591-603. gs :: view :: open

    de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs :: view :: open

    Martini, E. (1986). Paleogene calcareous nannoplankton from the southwest Pacific Ocean, Deep Sea Drilling Project, Leg 90. Initial Reports of the Deep Sea Drilling Project. 90: 747-761. gs :: view :: open

    Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs :: ::


    nannotaxlogo400px

    Sphenolithus calyculus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-7-2020

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1285 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (0)

    No comments yet on this page. Please do add comments if you spot any problems, or have information to share

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics