Subbotina angiporoides Hornibrook 1965 from: Tjalsma, R.C. (1977): Cenozoic Foraminifera from the South Atlantic, DSDP Leg 36. In: Initial Reports of the Deep Sea Drilling Project Vol. 36 p. 493-518 | . |
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Species Subbotina angiporoides Hornibrook 1965 |
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| Diagnosis / Definition: |
Pearson et al. (2006):
DESCRIPTION:-
Type of wall: Spinose, normal perforate, moderately cancellate, often thickened by addition of gametogenetic calcite, sacculifer/ruber-type wall.
Test morphology: Test small to moderate size,
non-umbilicate, spherical, quadrilobate, axial periphery
rounded; chambers inflated, increasing moderately in
size, ll to 13 coiled chambers in 3 whorls, usually 4
chambers in the final whorl that are often elongated along
the radial axis; final chamber usually strongly embracing,
and extended over the umbilical sutures; sutures weakly
depressed, radial to slightly curved; aperture a low,
indistinct, interiomarginal slit bordered by a thick lip
that extends the full width of the chamber face, opening
in and sometimes beyond the umbilical area.
Size: Holotype maximum diameter 0.45 mm;
hypotype size range 0.45 to 0.55 mm. |
| Discussion / Comments: |
Tjalsma (1977):
The wide variation of this species in Cores 31-29 is consistent with the variation of the species at Sites 267 and 274 as figured by Kaneps 500 (1975). Forms with arched apertures were only found in Sample 29, CC.
Subbotina angiporoides has also been reported from middle and high latitudes in the northern hemisphere, from northwest Europe (Berggren, 1969), and Sites 116-117A, Rockall Bank (Berggren, 1972a).
Pearson et al. (2006):
DISTINGUISHING FEATURES.-
Distinguished by having a strongly embracing final chamber on most individuals that resembles a bulla and extends over the umbilicus, and a low slit-like aperture that is bordered by a thick lip and is centered over the antepenultimate chamber. Prepenultimate chambers tend to be more globular in S. angiporoides than in the final whorl chambers of S. linaperta.
DISCUSSION.-
Hornibrook (1961) used the name Globigerina angipora Stache, 1865 for a taxon resembling Stache's figures. Later, after it was confirmed that Stache's specimens were lost he declared the species a nomen dubium and erected the name angiporoides for this taxon. The species is a common element of middle Eocene-early Oligocene austral assemblages and its extinction has been used to define the top of the Globigerina angiporoides Zone of Jenkins (1965) and the Subbotina angiporoides Zone (Zone AP13) of Stott and Kennett (1 990). Jenkins (1 966) distinguished
Globigerina angiporoides minima as an ancestral form that is smaller and less tightly coiled with a more open umbilicus and more inflated chambers. However, these foms are very difficult to distinguish consistelltly and, they are here considered synonymous. Morphologic
overlap of these forms is revealed by similarity of the
more loosely coiled paratype of G. angiporoides (Pl. 6.6,
Fig. 5) with the holotype of G. angiporoides minima
(Pl. 6.6, Figs. 9-11) and similarity of the more tightly
coiled paratype of G. angiporoides minima (Pl. 6.6, Fig.
8) with the holotype of G. angiporoides (Pl. 6.6, Figs.
1-3).
Blow (1979, p. 1253-1255) distinguished
Subbotina angiporoides lindiensis from S. angboroides
s.str. by its less tightly coiled, less closely appressed,
and less embracing chambers. Unlike S. angiporoides
s.str., the final chambers of Blow's illustrated paratypes
of S. angiporoides lindiensis, though broken, are
kummerform and positioned adjacent to, rather than over,
the umbilicus. The holotype of S. angiporoides
lindiensis, which was originally illustrated as
Globigerina linaperta pseu+eocaena (Subbotina) by
Blow and Banner (1 962, p1.Y l , fig. M) is very similar
to Blow's paratypes, except for the absence of a
kummerform chamber. The chamber arrangement and
presence of a broad apertural lip on all forms of Blow's
subspecies suggest that it is more closely related to
Subbotina yeguaensis (Weinzierl and Applin) than to S.
angiporoides.
PHYLOGENETlC RELATTONSHIPS.-
Evolved from S. linaperta during the middle Eocene, perhaps
within Zone P10 (Blow, 1979).
GEOGRAPHIC DISTRIBUTION.-
Cosmopolitan; most common at high latitudes especially in its upper range when it nearly disappears from low latitudes.
STABLE ISOTOPIC PALEOBIOLOGY.- Poore and
Matthews (1984) recorded lower Oligocene samples
with 6180 values intermediate between other species
from DSDP Site 522. |
| Systematics: |
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Superregnum Eukaryota
Regnum Protoctista
Phylum Ciliophora
Subphylum Postciliodesmatophora
Ordo Globigerinida
Superfamilia Globigerinaceae
Superfamilia Nonionacea
Familia Eoglobigerinidae
Familia Globigerinidae
Genus Subbotina
Species Subbotina angiporoides
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Ordo Foraminiferida
Superfamilia Globigerinaceae
Familia Globigerinidae
Genus Subbotina
Species Subbotina angiporoides
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| Synonym list: |
Tjalsma (1977):
Pearson et al. (2006):
1965 Globigerina angiporoides Hornibrook. - Hornibrook : p. 835-838 text-fig. 1a-i, 2 [uppermost Eocene or lowermost Oligocene,
upper Globigerina ampliapertura Zone, upper MacDonald Limestones, South Island, New Zealand]
1988 Subbotina angiporoides Hornibrook. - Poore & Bybell : pl. 4; fig. 10, 11 [upper Eocene Turborotalia cerroazulensis/cocoaensis
Zone, ACGS #4 borehole, New Jersey Coastal Plain]
1990 Subbotina angiporoides Hornibrook. - Stott & Kennett : p.559 pl. 7; fig. 3 [upper middle Eocene Zone AE8, ODP Hole 689B, Maud Rise, Weddell Sea, Antarctic
Ocean]
1991 Subbotina angiporoides Hornibrook. - Huber : p.440 pl. 5; fig. 5, 9 [lower Oligocene, ODP Hole 738B, Kerguelen Plateau, South Indian Ocean]
2006 Subbotina angiporoides Hornibrook. - Pearson et al. : p.128 pl. 6.6; fig. 1-13 (Pl. 6.6, Figs. 1-3: new SEMs of holotype of
Globigerina angiporoides Hornibrook)
(Pl. 6.6, Figs. 9- 11 : new SEMs of holotype of
Globigerina angiporoides minima Jenkins)
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| Was used in synonym list of: |
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| Stratigraphy - absolute ages: |
LAD: 30 ± 0 [Ma], Berggren et al. (1995)
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| Specimen: |
Geological and Nuclear Science Institute, Lower Hutt, New Zealand, Inventory number: TF 149111
Geological and Nuclear Science Institute, Lower Hutt, New Zealand, Inventory number: TF 149112
Geological and Nuclear Science Institute, Lower Hutt, New Zealand, Inventory number: TF 149113
Geological and Nuclear Science Institute, Lower Hutt, New Zealand, Inventory number: TF 149114
Geological and Nuclear Science Institute, Lower Hutt, New Zealand, Inventory number: TF 149115
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| References: |
Finlay,H.J. (1939):
New Zealand foraminifera; key species in stratigraphy, No. 1 . Transactions of the Royal Society of New Zealand Vol. 68
Hornibrook,N.B. (1965):
Globigerina angiporoides n. sp. from the Upper Eocene and Lower Oligocene of New Zealand and the status of Globigerina angipora Stache 1865 . N.Z. J. Geol. Geophys. Vol. 8 p. 834-83
Jenkins,D.G. (1966):
Planktonic foraminiferal zones and new taxa from the Danian to lower Miocene of New Zealand. . N. Z. J. Geol. Geophys. Vol. 8 p. 1088-1126
Jenkins,D.G. (1971):
New Zealand Cenozoic Planktonic Foraminifera . New Zealand Geological Survey Paleontological Bulletin Vol. 42
Samuel,O.. (1972):
New species of planktonic foraminifers from the Paleogene of the west Carpathian in Slovakia (Czechoslovakia) . Zbornik Geologick"ck Vied Západné Karpaty Vol. 17 p. 165-221
Tjalsma,R.C. (1977):
Cenozoic Foraminifera from the South Atlantic, DSDP Leg 36.
In: Initial Reports of the Deep Sea Drilling Project Vol. 36 p. 493-518
Krasheninnikov,V.A. and Basov,I.A. (1983):
Cenozoic planktonic foraminifers of the Falkland Plateau and Argentine Basin, Deep Sea Drilling Projejt Leg 71.
In: Initial Reports of the Deep Sea Drilling Project Vol. 71 Eds: Ludwig, W.J.Krasheninninov, V.A. p. 821-845
Poore,R.Z. and Bybell,L.. (1988):
Eocene to Miocene biostratigraphy of New Jersey Core ACGS # 4: Implications for regional stratigraphy . U. S. Geological Survey Bulletin 1829 p. 1-22
Stott,L.D. and Kennett,J.P. (1990):
Antarctic Paleogene planktonic foraminifer biostratigraphy:ODP Leg 113, Sites 689 and 690.
In: Proceedings of the Ocean Drilling Program Vol. 113
Huber,B.T. (1991):
Paleogene and early Neogene planktonic foraminifer biostratigraphy of Sites 738 and 744, Kerguelen Plateau (southern Indian Ocean).
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 119 Eds: Leckie, R.M.Sigurdsson, H.Acton, G.D.Draper, G. p. 427-449
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
Pearson,P.N.; Olsson,R.K.; Hemleben,C.; Huber,B.T. and Berggren,W.A. (2006):
Atlas of Eocene Planktonic Foraminifera. p. 1-513
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