pforams@mikrotax - Chilostomellidae pforams@mikrotax - Chilostomellidae


Classification: pf_mesozoic -> Chilostomellidae
Sister taxa: Guembelitriidae ⟩⟨ Heterohelicidae ⟩⟨ Planomalinidae, Globigerinelloididae, Schackoinidae ⟩⟨ Conoglobigerinidae, Chilostomellidae, Favusellidae, Praehedbergellidae, Hedbergellidae, Rugoglobigerinidae, Rotaliporidae, Globotruncanidae, hidden
Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa

Gubkinella graysonensis
Gubkinella sp.


Citation: Chilostomellidae Brady 1881
taxonomic rank: Family

Original description: Test calcareous, finely perforate. With Reuss's genera Chilostomella and Allomorphina, which together form his family Cryptostegia, I have associated Seguenza's genus Ellipsoidina. The anomalous characters of the latter, viewed as a Nodosarian, I pointed out many years ago, and had I then known the genus Chilostomella by anything more than figures, I should have suggested the present position for it. The primary difference in the structure of these two types consists in the fact that in Chilostomella the segments alternate, the attachment to each other being at one side, and the aperture first at one end and then at the other, whilst in Ellipsoidina the attachment is at the base, the segments grow in the same direction, and consequently the aperture is always at the same end.

Entries in the Catalog of original descriptions: Chilostomellidae

Geological Range:
Last occurrence (top): at top of Albian Stage (100% up, 100.5Ma, in Albian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Albian Stage (100.50-113.20Ma, base in Albian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:


Brady, H. B. (1881a). Notes on some reticularian Rhizopoda of the Challenger Expedition. Part III. Quarterly Journal of Microscopical Science. 21: 31-71. gs


Chilostomellidae compiled by the pforams@mikrotax project team viewed: 19-4-2024

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