pforams@mikrotax - Zeauvigerina zelandica pforams@mikrotax - Zeauvigerina zelandica

Zeauvigerina zelandica


Classification: pf_cenozoic -> Guembelitrioidea -> Heterohelicidae -> Zeauvigerina -> Zeauvigerina zelandica
Sister taxa: Z. lodoensis, Z. parri, Z. zelandica, Z. aegyptiaca, Z. teuria, Z. virgata, Z. waiparaensis, Z. sp.

Taxonomy

Citation: Zeauvigerina zelandica Finlay 1939
Taxonomic rank: species
Basionym: Zeauvigerina zelandica
Synonyms:
Taxonomic discussion: Huber and Boersma (1994, p. 278-279) noted similarity in the ontogenetic morphologies of Z. zelandica and Z. aegyptiaca and suggested that they may be synonymous. [Huber et al. 2006]

Catalog entries: Zeauvigerina zelandica

Type images:

Distinguishing features:
Parent taxon (Zeauvigerina):
This taxon: Distinguished from other zeauvigerinids by having a more elongate neck on the terminal uniserial chamber that is surrounded by a distinct rim.

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:
Distinguished from other zeauvigerinids by having a more elongate neck on the terminal uniserial chamber that is surrounded by a distinct rim. [Huber et al. 2006]

Morphology:
Test small, elongate, moderately tapering, periphery rounded rather than compressed; chambers biserial throughout, initially compressed, later globular, increasing gradually in size, 14 to 16 in adult tests, sutures distinct, moderately depressed, nearly perpendicular to the growth axis; aperture terminal on a variably produced neck, surrounded by a narrow lip. [Huber et al. 2006]

Wall type:
Test small, subcircular to elliptical in crosssectional Microperforate, finely pustulose, lacking pore mounds. [Huber et al. 2006]

Size:
Holotype length not stated; length of paratypes 0.21-0.28 mm, width 0.10-0.14 mm, breadth 0.08-0.09 mm. [Huber et al. 2006]

Character matrix
test outline:Elongatechamber arrangement:Biserialedge view:Compressedaperture:Terminal
sp chamber shape:Subrectangularcoiling axis:N/Aperiphery:N/Aaperture border:Thick flange
umb chbr shape:Subrectangularumbilicus:N/Aperiph margin shape:Narrowly roundedaccessory apertures:None
spiral sutures:Weakly depressedumb depth:N/Awall texture:Finely pustuloseshell porosity:Microperforate: <1µm
umbilical or test sutures:Weakly depressedfinal-whorl chambers:1-2 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution
This species has rarely been recorded outside New Zealand. [Huber et al. 2006]

Isotope paleobiology
No data available. [Huber et al. 2006]

Phylogenetic relations
Huber and Boersma (1994) suggested that Z. zelandica evolved from Z. aegyptiaca during the earliest Eocene and gave rise to Z. parri during the middle early Eocene. [Huber et al. 2006]

Most likely ancestor:
Zeauvigerina aegyptiaca - at confidence level 4 (out of 5). Data source: Huber et al. 2006 fig16.2.
Likely descendants: Zeauvigerina parri; plot with descendants

Biostratigraphic distribution

Geological Range:
Notes: Lowermost Eocene- upper Eocene (~Zones E1-E14). In New Zealand recorded from middle Waipawan through middle Kaiatan Stage. Also reported by Takayanagi and Oda (1976) in upper Eocene sediments in DSDP Hole 317B (equatorial South Pacific). [Huber et al. 2006]
Last occurrence (top): within E14 zone (35.89-37.99Ma, top in Priabonian stage). Data source: Huber et al. 2006
First occurrence (base): within E1 zone (55.81-55.96Ma, base in Ypresian stage). Data source: Huber et al. 2006

Plot of occurrence data:

Primary source for this page: Huber et al. 2006 - Eocene Atlas, chap. 16, p. 483

References:

Finlay, H. J. (1939a). New Zealand foraminifera: Key species in stratigraphy - no. 1. Transactions of the Royal Society of New Zealand. 68: 504-533. gs

Huber, B. T. & Boersma, A. (1994). Cretaceous origination of Zeauvigerina and its relationship to Paleocene biserial planktonic foraminifera. Journal of Foraminiferal Research. 24: 268-287. gs

Huber, B. T., Olsson, R. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene microperforate planktonic foraminifera (Jenkinsina, Cassigerinelloita, Chiloguembelina, Streptochilus, Zeauvigerina, Tenuitella, and Cassigerinella) and Problematica (Dipsidripella). 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 16): 461-508. gs O

Takayanagi, Y. & Oda, M. (1976). Shore laboratory report on Cenozoic planktonic foraminifera: Leg 33. Initial Reports of the Deep Sea Drilling Project. 33: 451-465. gs

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Zeauvigerina zelandica compiled by the pforams@mikrotax project team viewed: 9-2-2026

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