Gradstein 2017 f8 08-10.JPG
FG003v2-Globuligerina-avariformis.jpg
FG007 G avariformis SEM.jpg
FG003 Conoglobigerina helvetojurassica.jpg
Gradstein 2017 f8 08-10.JPG
FG003v2-Globuligerina-avariformis.jpg
FG007 G avariformis SEM.jpg
FG003 Conoglobigerina helvetojurassica.jpgTaxonomy
holotype: Conoglobigerina avariformisOriginal description: Test medium-sized, highly conical, trochospiral, length exceeds diameter. Coil consists of 3.5-4 whorls. First two whorls many-chambered with 5-6 small, spherical chambers of nearly uniform size, following ones have 3-4 chambers per whorl. Chambers spherical, subspherical in outline, rapidly increase in dimensions, somewhat compressed laterally. Proloculus small, spherical to oval in outline. No uniformity is seen in chamber shape. Sutures depressed, thin. Aperture umbilical, small, arcuate. Surface matte, tuberculate.
Entries in the Catalog of original descriptions: Conoglobigerina avariformis
Geological Range:
Last occurrence (top): within Early Oxfordian Substage (160.84-163.47Ma, top in Oxfordian stage). Data source: Gradstein et al. 2017
First occurrence (base): within Bajocian Stage (168.28-170.30Ma, base in Bajocian stage). Data source: Gradstein et al. 2017
Plot of occurrence data:
Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous
Character matrix
| test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Spiroconvex | aperture: | Umbilical |
| sp chamber shape: | Inflated | coiling axis: | High | periphery: | N/A | aperture border: | N/A |
| umb chbr shape: | Inflated | umbilicus: | Wide | periph margin shape: | Broadly rounded | accessory apertures: | None |
| spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Finely pustulose | shell porosity: | Microperforate: <1µm |
| umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 3.0-4.0 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Gradstein, F. M. (2017a). New and emended species of Jurassic planktonic foraminifera. Swiss Journal of Palaeontology. 136(2): 161-185. gs :: :: Kasimova, G. K. & Aliyeva, D. G. (1984). Planktonic foraminifera of the Middle Jurassic deposits of Azerbaidzhan. In, Alizade, K. A. (ed.) Questions in the paleontology and stratigraphy of Azerbaidzhan. Elm (for Akad Nauk Azerbaidzhan. SSR, Inst Geol im I.M. Gubkinaa), Baku 1-12. gs :: :: References:
 |
Globuligerina avariformis compiled by the pforams@mikrotax project team viewed: 7-6-2020
Short stable page link: http://mikrotax.org/pforams/index.php?id=110200 Go to Archive.is to create a permanent copy of this page - citation notes |