Scyphosphaera porosa

Classification: Coccolithophores -> Zygodiscales -> Pontosphaeraceae -> Scyphosphaera -> Scyphosphaera porosa
Sister taxa: S. apsteinii, S. porosa, S. brevis, S. globulata, S. hamptonii, S. hemirana, S. lagena, S. campanula, S. intermedia, S. pulcherrima, S. tubifera, S. ventriosa, S. columella, S. expansa, S. interstincta, S. olla, S. tercisensis, S. tubicena, S. sp.,


Citation: Scyphosphaera porosa Kamptner, 1967
Rank: Species
Variants: Scyphosphaera elegans (Ostenfeld, 1910) Deflandre, 1942 [decribed as Thorosphaera elegans] - appears very similar although its' equatorial coccoliths are more abundant and narrower. It has more recently been regarded as of uncertain affinities, possibly not a coccolithophore, see Jordan and Chamberlain (1992). Almost all literature records of Thorosphaera elegans relate to specimens of Gladiolithus flabellatus.
S. galeana Kamptner, 1967; S. magna Kamptner, 1967; - these two species were both described from the same sample as S. porosa (Challenger dredging 338) and have broadly similar morphology.
Notes & discussion: Described from isolated coccoliths in the sediment but recently completely coccospheres have been recorded from the plankton (Young 2008, Frada et al. 2010)

Distinguishing features: Lopadoliths - large gently-flaring or parallel sided; R-unit only extends to about one third height of lopadolith

Farinacci & Howe catalog pages: Scyphosphaera porosa * , Scyphosphaera galeana * , Scyphosphaera magna * , Thorosphaera elegans *

Size: Coccosphere excluding lopadoliths ca. 30µm; lopadoliths 15-20µm (Young 2008)

Ecology & Biogeography: Deep photic, only ever recorded from the South Atlantic gyre - unless the S. elegans specimens of Ostenfeld are records of the taxon.

Search data:
TagsLITHS: murolith, flaring distally, elliptical, cylindrical, hollow, RIM: rim-high, outer wall acw-imbricate, CA: plate, pores, PROCESS: hollow,
CSPH: spherical, equant, BC-dimorphic, EqC, EqC-tubular, polymorphic, V-UNITS: outer-rim, V-prominent, R-UNITS: c-str, inner-rim, px-plate, R-prominent, DETAILS: rim-bicyclic, isogyres oblique, isogyres separated,
MetricsLith size: 15->20µm; Coccosphere size: 50->70µm;
Sources: lith height from OD & Young 2008; csph height from illustrated specs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within Pliocene Epoch (2.59-5.33Ma, base in Zanclean stage). Data source: [JRY rough estimate]

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: Scyphosphaera porosa, synonyms included - Scyphosphaera elegans; Scyphosphaera galeana; Scyphosphaera magna; Scyphosphaera porosa;
  • space-time plot :: Samples map :: Parent: Scyphosphaera


    Deflandre, G. (1942). Coccolithophoridés fossiles d'Oranie. Genres Scyphosphaera Lohmann et Thorosphaera Ostenfeld. Bulletin de la Société d'histoire naturelle de Toulouse. 77: 125-137. gs :: ::

    Frada, M. et al. (2010). A guide to extant coccolithophores (Calcihaptophycidae, Haptophyta) using light microscopy. Journal of Nannoplankton Research. 31(3): 58-112. gs :: view :: open

    Jordan, R. W. & Chamberlain, A. H. L. (1992). Vexillarius cancellifer gen. et sp. nov., and its possible affinities with other living coccolithophorids. In, Hamrsmid, B. & Young, J. R. (eds) Nannoplankton Research, Proceedings of the 4th INA Conference, Prague 1991, vol II. Knihovnicka ZPN. 14b: 305-325. gs :: view :: open

    Kamptner, E. (1967). Kalkflagellaten - Skelettreste aus Tiefseeschlamm des Südatlantischen Ozeans. Annalen des Naturhistorischen Museums in Wien. 71: 117-198. gs :: ::

    Ostenfeld, C. H. (1910). Thorosphaera, eine neue Gattung der Coccolithophoriden. Bericht der Deutschen Botanischen Gesellschaft. 28: 397-400. gs :: ::

    Siesser, W. G. (1998). Calcareous nannofossil Genus Scyphosphaera: structure, taxonomy, biostratigraphy, and phylogeny. Micropaleontology. 44(4): 351-384. gs :: ::

    Young, J. R. (2008). Scyphosphaera porosa Kamptner 1967 rediscovered in the plankton. Journal of Nannoplankton Research. 30(1): 35-38. gs :: view :: open


    Scyphosphaera porosa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2020

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