S. deflandrei Muller, 1974 - very similar, elongate with low collar:
S. kamptneri Muller, 1974 - very similar, elongate with low collar:
S. pacifica Rade, 1975 - very similar, elongate with low collar:
S. abelei Rade, 1975 - opening wider and collar weaker:
S. australiensis Rade, 1975 - opening wider and collar weaker:
S. queenslandensis Rade, 1975 - opening wider and collar weaker:
S. gladstonensis Rade, 1975 - opening wider and collar weaker
S. rottiensis Jafar, 1975 - opening wider and collar weaker
Taxonomic discussion: The holotype specimen of S. ventriosa is rather broader than most specimens but clearly has the weak collar which is the main criterion for grouping these forms, and the name has priority over the other variants included here.
Distinguishing features: Parent taxon (Scyphosphaera): Coccospheres with Pontosphaera-like body coccoliths and equatorial coccoliths with rims elevated into vase-like structures (lopadoliths). This taxon: Similar to S. apsteinii but with low collar around opening.
Lith size: 12->20µm; Data source notes: lith height from ODs
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range: Notes: Range very poorly constrained Last occurrence (top): within NN15 zone (3.70-3.92Ma, top in Zanclean stage). Data source: Young 1998 First occurrence (base): within NN9 zone (9.53-10.55Ma, base in Tortonian stage). Data source: Young 1998
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Jafar, S. A. (1975). Calcareous nannoplankton from the Miocene of Rotti, Indonesia. Verhandelingen der Koninklijke Nederlandse Akademie van Wetenschappen. 28: 1-99. gsO
Martini, E. (1968). Calcareous nannoplankton from the type Langhian. Giornale di Geologia. 35: 163-172. gs
Müller, C. (1974). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. gs
Perch-Nielsen, K. (1972). Remarks on Late Cretaceous to Pleistocene coccoliths from the North Atlantic. Initial Reports of the Deep Sea Drilling Project. 12: 1003-1069. gs
Rade, J. (1975). Scyphosphaera evolutionary trends with special reference to eastern Australia. Micropaleontology. 21: 151-165. gs
Siesser, W. G. (1998). Calcareous nannofossil Genus Scyphosphaera: structure, taxonomy, biostratigraphy, and phylogeny. Micropaleontology. 44(4): 351-384. gs
Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 225-265. gs
Scyphosphaera ventriosa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-6-2023
PN72 pl20-04.JPG
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Muller74Leg25-pl13-12.JPG
Muller74Leg25-pl15-6.JPG
PN72 pl20-03.JPG
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Siesser1998 pl3-8a.JPG
Siesser1998 pl1-1a.JPG
Siesser1998 pl2-8a.JPG
Siesser1998 pl3-1a.JPG
Siesser1998 pl4-4a.JPG
Siesser1998 pl5-10a.JPG
Siesser1998 pl5-5a.JPG
Young1998_ventriosa.jpg
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