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Conoglobigerina dagestanica


Classification: pf_mesozoic -> Conoglobigerinidae -> Conoglobigerina -> Conoglobigerina dagestanica
Sister taxa: C. avarica, C. balakhmatovae, C. caucasica, C. conica, C. dagestanica, C. gulekhensis, C. jurassica, C. meganomica, C. terquemi, C. sp.,

Taxonomy

Citation: Conoglobigerina dagestanica (Morozova in Morozova & Mosklenko, 1961)
Rank: Species
Basionym: Globigerina (Conoglobigerina) dagestanica

Type images:

Original description: Globigerina (Conoglobigerina) dagestanica Morozova, in Morozova & Moskalenko 1961: Test small, high, its diameter equal to or greater than the height. Chambers arranged in a high, very steep spiral consisting of three whorls. The final whorl consists of three or four spherical chambers differing but little in size. The penultimate and final whorls usually have the same number of chambers, the first whorl often having up to five chambers. Sutures between the chambers of late whorls depressed, straight; those between the chambers of the first whorl weakly depressed, straight or slightly oblique. Aperture umbilical, an elongate slit, or low, crescentic. Wall radiate, thin, moderately porous. Surface matte.

Entries in the Catalog of original descriptions: Globigerina (Conoglobigerina) dagestanica;

Geological Range:
Last occurrence (top): within Bathonian Stage (166.07-168.28Ma, top in Bathonian stage). Data source: [copied from Chronos database]
First occurrence (base): within Bajocian Stage (168.28-170.30Ma, base in Bajocian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
umb chamber shape:Inflatedcoiling axis:Highperiphery:N/Aaperture border:Thin lip
sp chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:N/A
umbilical or test sutures:Moderately depressedumb depth:Shallowwall texture:Finely pustuloseshell porosity:Finely Perforate: 1-2.5
spiral sutures:Moderately depresseddiameter mm:0.12 - 0.15width mm:0.08 - 0.12breadth mm:0.07 - 0.17
final-whorl chambers:3.5-5.5

References:

Morozova, V.G. & Moskalenko, T.A., (1961). Foraminiferes planctoniques des depots limitrophes du Bajocien et du Bathonien du Daghestan central (Nord-Est du Caucase). Voprosy Mikropaleontol., U.S.S.R., 5: 3-30.


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Conoglobigerina dagestanica compiled by the pforams@mikrotax project team viewed: 18-8-2017

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