Pontosphaera wechesensis


Classification: ntax_cenozoic -> 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: S. wechesensis * , D. amphitheatralis + * , K. excelsa *


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

Search data:
TagsLITHS: murolith, elliptical, CA: vacant, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
MetricsLith size: 9->11µm;
Data source notes: 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:

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. 1-381. gs

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

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

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 V O

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Pontosphaera wechesensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-1-2021

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