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Globigerina euapertura Jenkins 1960 from: Vincent, E.Toumarkine, M. (1990): Neogene planktonic foraminifers from the Western Tropical Indian Ocean, Leg 115. In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 115 Eds: Duncan, R.A..Backman, J.Peterson, L.C. p. 795-836
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Anonymous: Unedited TaxonConcept data
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Species Globigerina euapertura Jenkins 1960


Discussion / Comments:
Jenkins (1985):
G. euapertura is limited to the Oligocene; its low arched aperture and tightly coiled test distinguish it from G. ampliapertura which has a higher arched and more oblong shaped aperture. Within its Early Oligocene stratigraphic range G. euapertura differs from G. brevis, which has a more compact test with deep sutures. In the upper part of its range in the Late Oligocene it is distinguished from G. woodi, G. brazieri and G. labiacrassata in possessing a much lower aperture.
Van Eijden & Smit (1991):
Remarks. All specimens of Globigerina with three to four appressed chambers in the final whorl, when not referable to any other species, were lumped under G. euapertura. More commonly than not, the final chamber is aberrant, commonly rendering it hard to distinguish from Catapsydrax. Our use of this "species" as a "waste basket" only partly explains its extreme abundance (up to 90%).
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globigerinaceae
       Superfamilia Nonionacea
        Familia Globigerinidae
         Genus Globigerina
          Species Globigerina euapertura

22
  Genus Globigerina
   Species Globigerina euapertura

32
 Ordo Foraminiferida
  Familia Globigerinidae
   Genus Globigerina
    Species Globigerina euapertura
Synonym list:
Jenkins (1985):
1960 Globigerina euapertura Jenkins. - Jenkins : p.351 pl. 1, figs. 8a-c
1985 Globigerina euapertura Jenkins. - Jenkins : p.273 figs. 6.18; 5
Van Eijden & Smit (1991):
1960 Globigerina euapertura Jenkins. - Jenkins : p.351 pl. 1, figs. 8a-c
1991 Globigerina euapertura Jenkins. - Van Eijden & Smit : p.120 pl. 2, figs. 13-16
Vincent & Toumarkine (1990):
1960 Globigerina euapertura Jenkins. - Jenkins : p. 351 pl. 1, fig. 8
1990 Globigerina euapertura Jenkins. - Vincent & Toumarkine : p. 796
Spezzaferri & Silva (1990):
1985 Globigerina euapertura Jenkins. - Jenkins : fig. 6 (18a-c)
1990 "Globigerina" euapertura Jenkins. - Spezzaferri & Silva : p.245 pl. VII; fig. 4a-c
Chaisson & Leckie (1993):
1960 Globigerina euapertura Jenkins. - Jenkins : p.351 pl. 1; fig. 8a-c
1985 Globigerina euapertura Jenkins. - Bolli & Saunders : p.180 fig. 13.21a-b
Quilty (1976):
1960 Globigerina euapertura Jenkins. - Jenkins : p.351 pl. 1, figs. 8a-c
Was used in synonym list of:
Stratigraphy - absolute ages:
LAD: 23.8 ± 0 [Ma], Berggren et al. (1995)
FAD: 23.8 ± 0 [Ma], Berggren et al. (1995)
References:

Jenkins,D.G. (1960):
Planktonic foraminifers from the Lakes Entrance oil shaft, Victoria, Australia . Micropaleontology Vol. 6(4) p. 345-371

Quilty,P.G.. (1976):
Planctonic foraminifera DSDP Leg 34- Nazca Plata . DSDP initial reports Vol. 34

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

Bolli,H.M. and Saunders,J.B. (1985):
Oligocene to Holocene low latitude planktic foraminifers.
In: Plankton Stratigraphy Eds: Bolli, H.M.Saunders, J.B. p. 155-262

Spezzaferri,S. and Silva,I.S.. (1990):
Oligocene planktonic foraminiferal biostratigraphy and paleoclimatic interpretation from Hole 538A, DSDP Leg 77, Gulf of Mexico . Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 83 p. 217-263

Vincent,E. and Toumarkine,M. (1990):
Neogene planktonic foraminifers from the Western Tropical Indian Ocean, Leg 115.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 115 Eds: Duncan, R.A..Backman, J.Peterson, L.C. p. 795-836

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123

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
Anonymous: Unedited TaxonConcept data
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