Subbotina corpulenta Subbotina 1953 from: Pearson, P.N.Olsson, R.K.Hemleben, C.Huber, B.T.Berggren, W.A. (2006): Atlas of Eocene Planktonic Foraminifera. p. 1-513 | . |
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Species Subbotina corpulenta Subbotina 1953 |
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| Diagnosis / Definition: |
Pearson et al. (2006):
DESCRIPTION.
Type of wall: Cancellate, normal perforate,
spinose. Test morphology: Test moderately high
trochospiral, lobulate in outline, chambers globular; in
spiral view 4-4 1/2 globular chambers in ultimate whorl,
increasing moderately in size, sutures moderately
depressed, straight to slightly curved; in umbilical view
4-4 1/2 globular chambers, increasing moderately in size,
often with a reduced ultimate chamber cantilevered over
the umbilicus, sometimes centered and resembling a
bulla, sutures moderately depressed, straight to slightly
curved, umbilicus moderate in size, enclosed by
surrounding chambers and often partly to entirely
covered by the ultimate chamber; aperture umbilical,
generally without a lip; in edge view test with a
moderately elevated initial whorl, chambers globular in
shape, aperture generally not visible.
Size: Maximum diameter of holotype 0.57 mm,
thickness 0.38 mm. |
| Discussion / Comments: |
Pearson et al. (2006):
DISTINGUISHING FEATURES.-
The species is
characterized by its generally large adult size, moderately
elevated initial spire, lobulate test, globular chambers
and the cantilevered ultimate chamber directed over the
umbilicus.
DISCUSSION.-
Subbotina corpulenta belongs to the
group of large subbotinids which includes S. eocaena
and S. hagni. It differs from S. hagni in the arrangement
of the ultimate chamber, which is cantilevered over the
umbilicus in varying degrees. Although this arrangement
does not occur in all specimens, it characteristically
occurs in a population of the species. Subbotina eocaena
is more tightly coiled and has 3 1/2 chambers in the
ultimate whorl. Globigerina cryptomphala Glaessner
may be a senior synonym but Glaessner's specimens are
lost. Subbotina (1953) apparently did not consider his
species as representing her new species S. corpulenta
and placed cryptomphala in synonomy with Globigerina
bulloides d'orbigny. However, Toumarkine and Luterbacher (1985) recognized Glaessner's species, and considered it separate from cryptomphala. We place all these morphotypes in S. corpulenta. As noted by many workers, the peak abundance of large subbotinids occurs in the middle to upper Eocene. They are less abundant in the uppermost Eocene, where they are replaced by various species of Dentoglobigerina.
PHYLOGENETIC RELATIONSHIPS.-
Subbotina
corplenta belongs to a group of closely related Eocene
large-sized subbotinids, which includes S. eocaena and
S. hagni. It is closely related to S. hugni, from which it
evolved, by development of an elevated initial spire, and
an umbilically cantilevered ultimate chamber.
GEOGRAPHIC DISTRIBUTION.-
Global in low to mid latitudes.
STABLE ISOTOPE PALEOBIOL0GY.-
Poore and
Matthews (1984) and Boersma and others (1987)
recorded this species (as Globigerina pera) as having
the most positive ň18O of any planktonic species in the
lower Oligocene, indicating a deep water habitat. |
| Systematics: |
35
Ordo Foraminiferida
Superfamilia Globigerinaceae
Familia Globigerinidae
Genus Subbotina
Species Subbotina corpulenta
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| Synonym list: |
Pearson et al. (2006):
1953 Globigerina corpulenta Subbotina. - Subbotina : p.101 pl. 9, fig. 5a-7c (5a-c = holotype)[upper Eocene Zone of Globigerinoides conglobatus and large Globigerina, northern Caucasus];
pl. 10, fig. 1a-c [upper Eocene,
subzone with large Globigerina, White Series, Kuban River, northern Caucasus];
pl. 10, fig. 2a-c [upper Eocene
Globigerinoides conglobatus Zone, Upper White Series, Mangyshlak Dzhaman-Kyzylyt];
pl. 10, fig. 3a-c [upper
Eocene zone of Globigerinoides conglobatus and large Globigerina, Khieu River, northern Caucasus];
pl. 10, fig. 4a, b [upper Eocene lagenid zone, Kiev Stage (kw), Stalingrad region, Krasnoarmeisk]
p 1953 Globigerina inflata d'Orbigny. - Subbotina : p.94 pl. 7, fig. 6a-8b (partim, not pl. 8: fig. 7a-c) [upper Eocene Bolivina Zone, White Series, Kuban River, northern Caucasus];
pl. 8, fig. 1a-c [upper Eocene zone with
Almaena taurica, Crimea];
pl. 8, fig. 2a-6c [lower Oligocene, Matsestinsk Series, Mount Bytkha, northern Caucasus];
pl. 15, fig. 4a-6c [upper Eocene zone of
Globigerznoides conglobatus and large Globigerina,
Khieu River, northern Caucasus] [Not d'Orbigny, 1839.]
1957 Globigerina pera Todd. - Todd : p.301 pl. 70; fig. 10, 11 [upper
Eocene, Saipan].
1962 Globigerinita pera Todd. - Blow & Banner : p.112 pl. 14; fig. E-H [lower Oligocene Globigerina
oligocaenicu Zone, Sample FCRM 1922, Lindi area,
Tanzania]
1975 Globigerina cryptomphala Glaessner. - Toumarkine : p.742 pl. 1; fig. 5 [middle Eocene Zone E10/11, DSDP
Site 313, northeastern Mid-Pacific Mountains, western Pacific Ocean]
1977 Globigerina eocaena Guembel. - Poore & Brabb : p.255 pl. 4; fig. 12 [upper Eocene Zone E 14/15, Two Bar Shale
Member, San Lorenzo Fm., Santa Cruz Mountains,
California] [Not Guembel, 1868.]
1980 Catapsydrax pera Todd. - Charollais et al. : pl. 5; fig. 14 [lower Oligocene, France]
1985 Globigerina cryptomphala Glaessner. - Toumarkine & Luterbacher : p.149 fig. 42: 5a, b [reillustration of holotype, upper Eocene, North Caucasus];
fig. 42: 6 [reillustration of Charollais and others, 1980, pl. 5, fig. 14, lower Oligocene, France, identified as Catapsydrax pera]
2006 Subbotina corpulenta Subbotina. - Pearson et al. : p.131 pl. 6.7; fig. 1-14 (Pl. 6.7, Figs. 1-3: new SEMs of holotype of
Globigerina corpulenta Subbotina)
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| Specimen: |
VNIGRI collections, St. Petersburg, Inventory number: 4033
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| References: |
Glaessner,M.F. (1937):
Planktonische Foraminiferen aus der Kreide und dem Eozän und ihre stratigraphische Bedeutung.
In: Studies in Micropaleontology Vol. 1(1) p. 27-46
Subbotina,N.N. (1953):
Iskopaemye foraminifery SSSR (Globigerinidy, Khantkenininidy i Globorotaliidy) . Trudy Vsesoyznogo Nauchno-Issledovatel'skogo Geologo-razvedochnogo Instituta (VNIGRI) Vol. 76 p. 296
Hofker,J. (1956):
Foraminifers of Santa Cruz and Thatcher Island, Virginia Archipelago, West Indies. . Copenhagen Univ., Zool. Mus. Spolia (Skrifler) Vol. 15
Todd,R. (1957):
Smaller foraminifers.
In: Geology of Saipan, Mariana Islands (Pt. 3) Paleontology, US. Geological Survey Professional Papers280-H p. 265-320
Blow,W.H. and Banner,F.T. (1962):
The Mid-Tertiary (Upper Eocene to Aquitanian) Globigerinaceae.
In: Fundamentals of Mid‑Tertiary Stratigraphical Correlation Eds: Eames, F.E.Banner, F.T.Blow, W.H.Clarke, W.J. p. 61‑151
Toumarkine,M. (1975):
Middle and Late Eocene planktonic foraminifera from the northwestern Pacific, Leg 32 of the Deep Sea Drilling Project.
In: Initial Reports of the Deep Sea Drilling Project Vol. 32 Eds: Larson, R.L.Moberly, R. p. 735-751
Poore,R.Z. and Brabb,E.E.. (1977):
Eocene and Oligocene planktonic foraminifera from the Upper Butano Sandstone and type San Lorenzo Formation, Santa Cruz Mountains, California . Journal of Foraminiferal Research Vol. 7 p. 249-272
Charollais,J..; Hochuli,P..; Oektlt,H..; Perch-Nielsen,K.; Toumarkine,M.; Rögl,F. and Pajris,-.J.. (1980):
Les Marnes Foraminiféres et les Schistes a Meletta des Chaines Subalpines septentrionales (Haute-Savoie, France) . Eclogae Geologicae Helvetiae Vol. 73 p. 9-69
Toumarkine,M. and Luterbacher,H.P. (1985):
Paleocene and Eocene Planktic Foraminifera.
In: Plankton Stratigraphy p. 87-154
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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