Pontosphaera wechesensis


Classification: Coccolithophores -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera wechesensis
Sister taxa: << < P. distincta, P. enormis, P. desuetoidea, P. geminipora, P. longiforaminis, P. megapachydisca, P. veta, P. syracusana, P. alta, P. panarium, P. versa, P. wallacei, P. latoculata, P. sp.A, P. formosa, P. wechesensis, P. fimbriata, P. brinkhuisii, P. hollisii, P. romansii, P. japonica, P. plana, P. rimosa, P. pectinata, P. wilsonii, P. punctosa, P. clinosulcata, P. perforomarginata, P. pulcheroides, P. pulchra, P. pygmaea, > >>

Taxonomy:

Citation: Pontosphaera wechesensis (Bukry & Percival 1971) Aubry 1986
Rank: Species
Basionym: Syracosphaera wechesensis Bukry & Percival 1971
Synonyms:

Distinguishing features: Large (9-10 µm) Pontosphaera with elevated rim and distal flange; sculpted margin and large central opening.

Farinacci & Howe catalog pages: Discolithina amphitheatralis + * , Syracosphaera wechesensis * , Koczyia excelsa *


Ecology & Biogeography: Described from shallow marine sediments in Texas and inferred to be a neritic species.

Search data:
TagsLITHS: murolith, elliptical, RIM: flange-distal, outer wall acw-imbricate, CA: vacant,
CSPH: not known, V-UNITS: outer-rim, V-prominent, R-UNITS: all, c-str, distal shield, inner-rim, px-plate, R-prominent, DETAILS: isogyres oblique, isogyres separated, rim-unicyclic,
MetricsLith size: 9->11µm;
Sources: lith size 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 Middle Eocene Sub-Epoch (37.75-47.84Ma, top in Bartonian stage). Data source: Bukry & Percival 1971
First occurrence (base): within Middle Eocene Sub-Epoch (37.75-47.84Ma, base in Lutetian stage). Data source: Bukry & Percival 1971

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: Pontosphaera wechesensis, synonyms included - Koczyia wechesensis; Pontosphaera wechensis; Pontosphaera wechesensis; Syracosphaera wechesensis;
  • space-time plot :: Samples map :: Parent: Pontosphaera

    References:

    Aubry, M-P. (1986a). Palaeogene calcareous nannofossil biostratigraphy of northwestern Europe. Palaeogeography Palaeoclimatology Palaeoecology. 55: 267-334. gs :: ::

    Aubry, M. -P. (1990). Handbook of Cenozoic calcareous nannoplankton. Book 4: Heliolithae (Helicoliths, Cribriliths, Lopadoliths and others). Micropaleontology Press, American Museum of Natural History, New York. 381-. gs :: ::

    Bukry, D. & Percival, S. F. (1971). New Tertiary calcareous nannofossils. Tulane Studies in Geology and Paleontology. 8: 123-146. gs :: view :: open

    Bybell, L. (1975). Middle Eocene calcareous nannofossils at Little Stave Creek, Alabama. Tulane Studies in Geology and Paleontology. 11(4): 177-247. gs :: view :: open

    Levin, H. L. & Sherwood, R. W. (1971). A new Eocene species of Discolithina from Texas. Journal of Paleontology. 45(4): 731-733. gs :: ::

    Perch-Nielsen, K. (1971c). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs :: ::

    Perch-Nielsen, K. (1977a). Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39: 699-823. gs :: view :: open

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    Pontosphaera wechesensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-6-2020

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