Parasubbotina prebetica


Classification: pf_cenozoic -> Globigerinidae -> Parasubbotina -> Parasubbotina prebetica
Sister taxa: P. griffinae, P. eoclava, P. hagni, P. prebetica, P. inaequispira, P. pseudowilsoni, P. variospira, P. varianta, P. pseudobulloides, P. aff. pseudobulloides, P. sp.,

Taxonomy

Citation: Parasubbotina prebetica (Martinez-Gallego & Cremades 1979)
Rank: Species
Basionym: Globigerina prebetica
Synonyms:
Taxonomic discussion: This species has only one known occurrence. Its high porosity, reticulated sacculifer-type wall texture indicates that is a member of Parasubbotina and is apparently an early evolutionary offshoot from P. inaequispira with a short stratigraphic range. [Olsson et al. 2006]

Catalog entries: Globigerina (Eoglobigerina) prebetica

Type images:

Distinguishing features: Test symmetrical, compressed with radially elongate, globular to cylindrical chambers.

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


Diagnostic characters: Identified by the symmetrical, compressed test with elongate, globular to cylindrical chambers. The radially elongate chambers are reminiscent of Clavigerinella, but this species is distinguished from that genus by the trochospiral coiling mode. [Olsson et al. 2006]

Character matrix

test outline:Stellatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Elongatecoiling axis:Very lowperiphery:N/Aaperture border:Thick lip
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:Shallowwall texture:Cancellateshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.0-4.5 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Known only from Spain. The morphology is convergent with other cold water high productivity species. [Olsson et al. 2006]
Aze et al. 2011 summary: Known only from Spain; based on Olsson et al. (2006c)

Isotope paleobiology: No data available. [Olsson et al. 2006]
Aze et al. 2011 ecogroup 6 - Upwelling/high productivity. Based on occurrence predominantly in sites of high productivity or upwelling. Sources cited by Aze et al. 2011 (appendix S3): this study

Phylogenetic relations: Parasubbotina prebetica appears to have developed from P. inaequispira in Lower Eocene Zone E5. [Olsson et al. 2006]

Most likely ancestor: Parasubbotina inaequispira - at confidence level 4 (out of 5). Data source: Olsson et al. 2006 f5.1.

Biostratigraphic distribution

Geological Range:
Notes: Upper part of Zone E5. [Olsson et al. 2006]
Last occurrence (top): within E5 zone (50.67-52.54Ma, top in Ypresian stage). Data source: Olsson et al. 2006
First occurrence (base): within E5 zone (50.67-52.54Ma, base in Ypresian stage). Data source: Olsson et al. 2006

Plot of occurrence data:

Primary source for this page: Olsson et al. 2006 - Eocene Atlas, chap. 5, p. 103

References:

Martinez-Gallego, J. & Cremades, J. (1979). Globigerina (Eoglobigerina) prebetica, nueva especie de foraminifero planctonico del Eoceno inferior. Revista Espanola de MicropaleontologĂ­a. 11(1): 96-98. gs

Olsson, R. K., Pearson, P. N. & Huber, B. T. (2006c). Taxonomy, biostratigraphy, and phylogeny of Eocene Catapsydrax, Globorotaloides, Guembelitrioides, Paragloborotalia, Parasubbotina, and Pseudoglobigerinella n. gen. In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 5): 67-110. gs


logo

Parasubbotina prebetica compiled by the pforams@mikrotax project team viewed: 18-9-2019

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=100230 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