Subbotina angiporoides Hornibrook 1965 (TaxonConcept

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Species Subbotina angiporoides Hornibrook 1965

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:

1
Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globigerinaceae
       Superfamilia Nonionacea
        Familia Eoglobigerinidae
         Familia Globigerinidae
          Genus Subbotina
           Species Subbotina angiporoides

35
  Ordo Foraminiferida
   Superfamilia Globigerinaceae
    Familia Globigerinidae
     Genus Subbotina
      Species Subbotina angiporoides

Synonym list:

Tjalsma (1977):

1965 Globigerina angiporoides Hornibrook. - Hornibrook : 835, 838 figs. 1-2

1971 Globigerina (Subbotina) angiporoides angiporoides Hornibrook. - Jenkins : p.160 pl. 20, figs. 588-594

1977 Subbotina angiporoides Hornibrook. - Tjalsma : p.509 pl. 5, fig. 1

Pearson et al. (2006):

1939 Globigerina angipora Stache. - Finlay : p.125

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]

1966 Globigerina angiporoides minima Jenkins. - Jenkins : p.1096 fig. 7; nos 52-57 [middle Eocene, Hampden Beach, South Island, New Zealand]

1971 Globigerina (Subbotina) angiporoides angiporoides Hornibrook. - Jenkins : pl. 20; fig. 588-594 [upper Eocene-lower Oligocene, South Island, New Zealand]

1972 Globigerina linaperta trunsdanubica Samuel. - Samuel : p. 181-182 pl. 37, fig. 4a-c; pl. 38, fig. 1-2 [upper Eocene, Nagyveleg-1 borehole, Bakony Mountains, Hungary]

1983 Globigerina (Subbotina) angiporoides angiporoides Hornibrook. - Krasheninnikov & Basov : p.838 pl. 3; fig. 1-4 [middle Eocene, DSDS Site 512, Falkland Plateau, southern South Atlantic]

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)

Was used in synonym list of:

Subbotina utilisindex Jenkins & Orr 1973

Stratigraphy - absolute ages:

LAD: 30 ± 0 [Ma], Berggren et al. (1995)

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

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

Anonymous: Unedited TaxonConcept data

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