Globoconella panda


Classification: pf_cenozoic -> Globorotaliidae -> Globoconella -> Globoconella panda
Sister taxa: G. inflata, G. puncticulata, G. sphericomiozea, G. terminalis, G. pliozea, G. conomiozea, G. conoidea, G. miozea, G. panda, G. sp.,

Taxonomy

Citation: Globoconella panda (Jenkins 1960)
Rank: Species
Basionym: Globorotalia menardii subsp. panda Jenkins 1960
Synonyms:
Variants:
  • Globorotalia ichinosekiensis Takayanagi and Oda is similar to the southern Pacific species Globorotalia panda Jenkins in the possession of a strongly convex spiral side and a nearly flat umbilical side. It is distingushed from G. panda by its thinner wall and carina, and less strongly curved sutures on the spiral side." [Hayashi et al. 2003]

Catalog entries: Globorotalia menardii panda, Globorotalia (Globorotalia) ichinosekiensis,

Type images:

Distinguishing features: Convex spiral side, flattened umbilical side, and a well developed peripheral keel

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 trochospiral, spiral side convex, umbilical side concave to almost flat, equatorial periphery slightly lobate, axial periphery acutely angular with a distinct thick keel; chambers strongly compressed, five in the final whorl, increasing rapidly in size; sutures on spiral side limbate strongly recurved; on umbilical side radial, depressed; surface smooth on spiral side, perforate, small pus- tules on the umbilical side; umbilicus small, aperture a very low arch bordered by a rim or lip, interiomarginal, extraumbilical. [Kennett & Srinivasan 1983]

Character matrix

test outline:Ovatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical-extraumbilical
sp chamber shape:Crescenticcoiling axis:Lowperiphery:Single keelaperture border:Thin lip
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Flushumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Weakly depressedfinal-whorl chambers:5.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Phylogenetic relations: Gr. (G.) panda is distinguished by its convex spiral side, flattened umbilical side, and a well developed peripheral keel. Gr. (G.) panda evolved from Gr. (G.) praescitula in temperate waters and is closely related to the Gr. (Menardella) archeomenardii-praemenardii plexus of the tropics. [Kennett & Srinivasan 1983]

Most likely ancestor: Globorotalia praescitula - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig. 13.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within N18 zone (5.20-5.72Ma, top in Zanclean stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within N9 zone (14.24-15.10Ma, base in Langhian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.110

References:

Hayashi, H., Kurihara, Y., Horiuchi, S., Iwashita, T. & Yanagisawa, Y. (2003). Planktonic foraminifera biostratigraphy of the Miocene sequence in the Iwadono Hills, Central Japan: An Integrated approach. Palaios. 18: 176-191. gs

Jenkins, D. G. (1960). Planktonic foraminifera from the Lakes Entrance oil shaft, Victoria, Australia. Micropaleontology. 6: 345-371. gs

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


logo

Globoconella panda compiled by the pforams@mikrotax project team viewed: 21-7-2019

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=104080 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