Globigerinoides bulloideus


Classification: pf_cenozoic -> Globigerinidae -> Globigerinoides -> Globigerinoides bulloideus
Sister taxa: G. elongatus, G. extremus, G. conglobatus, G. eoconglobatus, G. obliquus, G. altiaperturus, G. joli, G. neoparawoodi, G. kennetti, G. bollii, G. italicus, G. ruber, G. mitra, G. seigliei, G. subquadratus, G. diminutus, G. bulloideus, G. sp.,

Taxonomy

Citation: Globigerinoides bulloideus (Crescenti 1966)
Rank: species
Basionym: Globigerinoides bulloideus Crescenti 1966
Taxonomic discussion: Not in list of Aze et al. (2011) but the species is used by both Kennett & Srinivasan (1983) and Bolli & Saunders (1985). Spezzaferri et al. 2015 cite the species as being included intheir definition of Globigerinoides but did not comment further on it. If it did evolve from Globigerina bulloides then it should presumably be removed from Globigerinoides. [editor's comment - JRY 2018]

Catalog entries: Globigerinoides bulloideus

Type images:

Distinguishing features: Like G. bulloides but with supplementary apertures on the spiral side

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description


Test morphology: Test low to medium-high-trochospiral, wider than high; chambers spherical to subspherical, the four chambers of the last whorl increasing rapidly in size; sutures on spiral and umbilical side gently curved and depressed; surface hispid with spine bases and slightly pitted on earlier chambers; umbilicus wide, deep; primary aperture interiomarginal, umbilical, large, semicircular arch bordered by a distinct rim. Last few chambers show a single supplementary aperture opposite the primary one. [Kennett & Srinivasan 1983]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Low-moderateperiphery:N/Aaperture border:N/A
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:Sutural
spiral sutures:Strongly depressedumb depth:Deepwall texture:Cancellateshell porosity:Macroperforate: >2.5┬Ám
umbilical or test sutures:Strongly depressedfinal-whorl chambers:3.5-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Phylogenetic relations: In gross morphology, this species closely resembles Globigerina (Gg.) bulloides, from which it evolved by developing supplementary apertures on spiral side. [Kennett & Srinivasan 1983]

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within N19 zone (4.37-5.20Ma, top in Zanclean stage). Data source: Kennett & Srinivasan (1983)
First occurrence (base): within N17b zone (5.72-6.60Ma, base in Messinian stage). Data source: Kennett & Srinivasan (1983)

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.60

References:

Bolli, H. M. & Saunders, J. B. (1985). Oligocene to Holocene low latitude planktic foraminifera. In, Bolli, H. M. , Saunders, J. B. & Perch-Neilsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge, UK 155-262. gs

Crescenti, U. (1966). Sulla biostratigrafia del Miocene affiorante al confine Marchigiano-Abruzzese. Geologica Romana. 5: 1-54. gs

Kennett, J. P. & Srinivasan, M. S. (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania. 1-265. gs


logo

Globigerinoides bulloideus compiled by the pforams@mikrotax project team viewed: 22-10-2019

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=104035 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics