R. pseudoumbilicus group
Classification: ntax_cenozoic -> Isochrysidales -> Noelaerhabdaceae -> Reticulofenestra -> R. pseudoumbilicus group
Sister taxa: C. floridanus group, R. bisecta group, R. lockeri group, R. parvula group, R. pseudoumbilicus group, R. reticulata group, R. umbilicus group, R. sp.
Daughter taxa (time control age-window is: 0-800Ma) |
.jpg) | | | | Reticulofenestra calicis
Species of Reticulofenestra with the tube extended as a flaring cup-shaped structure.
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 |  |  |  | Reticulofenestra pseudoumbilicus
Medium to large size reticulofenestrid with central opening
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 30c.jpg) |  |  |  | Reticulofenestra haqii
Coccoliths small (3-5µm), intergrades with R. pseudoumbilicus.
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 |  |  |  | Reticulofenestra minuta
Coccoliths very small, <3µm. Probably includes several different species.
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 |  |  | | Reticulofenestra minutula
Coccoliths small 3-5µm, without slits, intergrades with Pseudoemiliania lacunosa.
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 |  |  |  | Reticulofenestra asanoi
Coccoliths >6.5µm, sub-circular or broadly elliptical, intergrades with P. lacunosa.
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| (sub)circular species |
 |  | | | Reticulofenestra kahniae
Coccoliths (sub)circular, broad central area (25-50% of coccolith width); NN3-4
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 |  |  |  | Reticulofenestra rotaria
Coccoliths circular, with wide central-area, 5-7µm; NN11
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 |  | | | Reticulofenestra pospichalii
Small (3-5µm), (sub)circular, with large central opening (ca 50% of coccolith width)
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Taxonomy:
Citation: R. pseudoumbilicus groupRank: species group
Distinguishing features: Neogene elliptical reticulofenestrids with an open central area (spanned by delicate proximal net, not visible in lm)
Farinacci & Howe catalog pages:
See also: Reticulofenestra perplexa - name used for forms with closed central area;
Search data:
| Tags | LITHS: |
| Metrics | Lith size: 1->12µm; |
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range:
Notes: Common in the Mioene and Pliocene. In the Paleogene similar species occur but are conventionally assigned to different species, placed here in the R. umbilicus group. Replaced in the Late Pliocene and Quaternary by Pseudoemiliania, Gephyrocapsa and Emiliania.
Last occurrence (top): in mid part of Ionian Stage (52% up, 0.4Ma, in Ionian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Ypresian Stage (67% up, 50.5Ma, in Ypresian stage). Data source: Total of range of species in this database
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
- Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: Reticulofenestra
References:
Young, J. R. (1990). Size variation of Neogene Reticulofenestra coccoliths from Indian Ocean DSDP cores. Journal of Micropalaeontology. 9: 71-86. gs V O
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