Taxonomy
of the ventral side in these species is also striking. G. multiloculata is quite common locally in the Greenhorn formation associated with the two species just described. It is easy to distinguish because of its numerous chambers and globigerine aspect with a narrowed periphery. [copied from Chronos database]
Original description: Test trochoid, biconvex, compressed; dorsal side strongly convex, ventral side moderately convex; chambers numerous, seven to nine in final whorl, very distinct, inflated, narrowly rounded but not keeled at their periphery, tending in the last whorl to be produced ventrally in the direction of the axis of coiling; umbilical area large and rather deep; sutures strongly depressed; wall finely perforate.
Entries in the Catalog of original descriptions: Globorotalia multiloculata
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Planoconvex | aperture: | Umbilical |
sp chamber shape: | Inflated | coiling axis: | Low-moderate | periphery: | Single keel | aperture border: | Thin flange |
umb chbr shape: | Trapezoidal | umbilicus: | Narrow | periph margin shape: | Narrowly rounded | accessory apertures: | Umbilical |
spiral sutures: | Moderately depressed | umb depth: | Deep | wall texture: | Smooth | shell porosity: | Microperforate: <1µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 7-9 | N.B. These characters are used for advanced search. N/A - not applicable |
See also: Globorotalia greenhornensis ;
Geological Range:
Last occurrence (top): within R. cushmani zone (94.03-98.69Ma, top in Cenomanian stage). Data source: [copied from Chronos database]
First occurrence (base): within R. cushmani zone (94.03-98.69Ma, base in Cenomanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Anaticinella multiloculata compiled by the pforams@mikrotax project team viewed: 13-10-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110007 Go to Archive.is to create a permanent copy of this page - citation notes |
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Comments