Globorotalia zealandica Hornibrook 1958 (TaxonConcept

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Species Globorotalia zealandica Hornibrook 1958

Alternative name:

Globorotalia (Globoconella) zealandica Hornibrook 1958

Discussion / Comments:

Jenkins (1985):
The only species with which G. zealandica can be confused in the Early Miocene of New Zealand is G. pseudocontinuosa, whose holotype is smaller (0.23 mm as opposed to 0.43 mat). Both have 4 chambers in the final whorl but G. zealandica has a squarer peripheral outline with recurved sutures on the spiral side. G. zealandica is distinguished from its immediate ancestor G. incognita which is smaller (0.36 mm), has a more compact test and is thicker walled. G. zealandica has been recorded in the Early Miocene Globigerinoides trilobus Zone in New Zealand, southeastern Australia (Jenkins, 1960), DSDP Leg 29 (Jenkins, 1975), the English Channel (Jenkins, 1977) and by Poore (1979) in the North Atlantic DSDP Leg 49 Site 408 in zones N 7 and N 8.
Chaisson & Leckie (1993):
Remarks: This is a temperate-zone species that is very rare at this tropical site. Specimens at Site 806 are tiny. Similar species: This species resembles Globorotalia praescitula, but that species generally has four and half rather than just four chambers in the final whorl. The sutures on the spiral side of a G. praescitula are more strongly curved. The chambers on the umbilical side of G. cf. G. zealandica are more inflated than those of G. praescitula. Globorotalia miozea is more sharply vaulted on the umbilical side and has a distinctly angular periphery on the chambers in the final whorl.

Systematics:

1
Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globorotaliaceae
       Superfamilia Nonionacea
        Familia Globorotaliidae
         Genus Globorotalia
          Species Globorotalia zealandica

Synonym list:

Jenkins (1985):

1958 Globorotalia zealandica Hornibrook. - Hornibrook : p.667 figs. 18, 19, 30

1985 Globorotalia zealandica Hornibrook. - Jenkins : p.277 figs. 7.6; 5

Chaisson & Leckie (1993):

1958 Globorotalia zealandica Hornibrook. - Hornibrook : p.667 fig. 18, 19 and 30

1983 Globorotalia (Globoconella) zealandica Hornibrook. - Kennett & Srinivasan : p.108 pl. 25; fig. 1-3

1993 Globorotalia cf. zealandica Hornibrook. - Chaisson & Leckie : p.173 pl. 4; fig. 13-16

Was used in synonym list of:

Globoconella zealandica Hornibrook 1958

Globorotalia (Globoconella) zealandica Hornibrook 1958

Stratigraphy - absolute ages:

LAD: 17.3 ± 0 [Ma], Berggren et al. (1995)

References:

Hornibrook,N. (1958):
New Zealand foraminifera: key species in stratigraphy, no. 6 . N.Z.J. Geol. Geophys. Vol. 4

Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.

Jenkins,D.G. (1985):
Southern mid-latitude Paleocene to Holocene planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 263-282

Chaisson,W.P. and Leckie,R.M. (1993):
High-Resolution Planktonic Foraminifer Biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific).
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 130 Eds: Berger, W.H.Kroenke, L.W..Mayer, L.A..et al. p. 137-178

Berggren,W.A.; Kent,D.V.; Swisher,C.C. and Aubry,M.P. (1995):
A revised Cenozoic Geochronology and Chronostratigraphy.
In: Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication Vol. 54

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