pforams@mikrotax - Conoglobigerinidae pforams@mikrotax - Conoglobigerinidae

Conoglobigerinidae


Classification: pf_mesozoic -> Conoglobigerinidae
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
Conoglobigerina
Chambers of the last whorl strongly embrace previous whorls; irregularly reticulate wall surface pattern
Conoglobigerina caucasica
Conoglobigerina grigelisi
Conoglobigerina gulekhensis
Conoglobigerina helvetojurassica
Conoglobigerina sp.

Globuligerina
Wall smooth or pustulose but without reticulate pattern
Globuligerina avariformis
Globuligerina balakhmatovae
Globuligerina bathoniana
Globuligerina dagestanica
Globuligerina glinskikhae
Globuligerina jurassica
Globuligerina oxfordiana
Globuligerina tojeiraensis
Globuligerina waskowskae
Globuligerina sp.

Petaloglobigerina

Petaloglobigerina simmonsi

Taxonomy

Citation: Conoglobigerinidae Simmons et al. 1997
taxonomic rank: Family

Original description: Those genera of the Favusellacea which do not possess a favose surface structure of fused pseudomuricae forming an anastomosing reticulation.

Entries in the Catalog of original descriptions: Conoglobigerinidae

Distinguishing features:
Parent taxon (pf_mesozoic):
This taxon: Small (<200µm), microperforate wall, 3-4 globose chambers in final wall, aperture umbilical


Morphology:
The oldest known foraminifera which may confidently be considered to have been planktonic were species of Conoglobigerina (C. avariformis Kasimova, C. balakhmatovae (Morozova), C. dagestanica Morozova and, possibly, C. avarica Morozova). These appeared in the Bajocian (Figure 2.2) and are known only from eastern Europe (central and northern Tethys). We consider them to belong to the Favusellacea, the aragonitic, microperforate, stage of life adopted by the gamonts of some pseudomuricate superfamily, with an umbilical aperture, and all the adult chambers of all of these species are subglobular in shape. They appear to show a marked dimorphism, however, which is a feature not known in true (holo-)planktonic forarninifera. [Simmons et al. 1997, p. 18]

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Low-moderateperiphery:N/Aaperture border:-
umb chbr shape:Globularumbilicus:-periph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:-wall texture:Finely pustuloseshell porosity:Microperforate: <1µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:0-0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): at top of Valanginian Stage (100% up, 132.6Ma, in Hauterivian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Bajocian Stage (168.17-170.90Ma, base in Bajocian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:

References:

Simmons, M. D., Boudagher-Fadel, M. K., Banner, F. T. & Whittaker, J. E. (1997). The Jurassic Favusellacea, the earliest Globigerina. In, Boudagher-Fadel, M. K., Banner, F. T. & Whittaker, J. E. (eds) The Early Evolutionary History of Planktonic Foraminifera. British Micropalaeontological Society Publication Series . 17-30. gs


logo

Conoglobigerinidae compiled by the pforams@mikrotax project team viewed: 22-7-2024

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/pforams/index.php?id=110066 Go to Archive.is to create a permanent copy of this page - citation notes



Add Comment

* Required information
Captcha Image
Powered by Commentics

Comments (2)

Avatar
Le Coze

Hi Jeremy,

Could you please tell me in which superfamily do you include Conoglobigerinidae?

Thank you,

François

Avatar
Jeremy Young(UK)

At least for now we are not using superfamilies in the Mesozoic module so I don't know.