Paragloborotalia griffinoides Olsson & Pearson 2006 from: Pearson, P.N.Olsson, R.K.Hemleben, C.Huber, B.T.Berggren, W.A. (2006): Atlas of Eocene Planktonic Foraminifera. p. 1-513 | . |
Notice: This catalogue page may contain unedited data.
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Species Paragloborotalia griffinoides Olsson & Pearson 2006 |
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| Diagnosis / Definition: |
Pearson et al. (2006):
DESCRIPTION.
Type of wall: Normal perforate, coarsely
cancellate, sacculifer-type, spinose.
Test morphology: Test very low trochospiral,
globular, subquadrate in outline; chambers globular,
much inflated, embracing; in spiral view 4, occasionally
4% globular, embracing chambers in ultimate whorl,
increasing rapidly in size; sutures slightly depressed,
straight; last 4 chambers make up about three-quarters
of the test, ultimate chamber may be slightly reduced in
size; in umbilical view 4, occasionally 41/2 globular,
embracing chambers, increasing rapidly in size, sutures
slightly depressed, straight; umbilicus very small
opening, sometimes closed offby surrounding chambers;
aperture umbilical-extraumbilical, bordered by a narrow,
often thickened, continuous, lip; ultimate chamber may
be slightly reduced in size; in edge view chambers
globular, periphery rounded, aperture a high arch
extending midway onto the peripheral edge, bordered
by a thickened lip.
Size: Maximum diameter of holotype 0.41 mm,
minimum diameter 0.39 mm, maximum width 0.29 mm. |
| Discussion / Comments: |
Pearson et al. (2006):
ETYMOLOGY.- Named because it is like, but not
identical to, Parasubbotina griffinae (Blow).
DlSTlNGUISHING FEATURES.- P. griffinoides is
distinguished by its small, very low trochospiral,
compact, subquadrate test, coarsely cancellate wall, and
aperture with a thickened contiinuous lip. Parasubbotina
varianta is more loosely coiled and its chambers are less
embracing than in P griffinoides, leading to a more
lobulate test. In P. griffinoides, the apertural lip is more
uniform and constant in thickness than in P. varianta
and other species of Parasubbotina. Parasubbotina
griffinae differs from Paragloborotalia griffinoides in
its generally larger test size, greater number of chambers
in the ultimate whorl, and high porosity, reticulate wall.
DISCUSSION.- When Blow (1979) described Globorotalia (Turborotalia) griffinae (=Parasubbotina
griffinae) he selected the holotype and some paratypes from the same sample (KANE 9 Core 42,200 cm) from which he also illustrated Hastigerina? bolivariana (=Pseudoglobigerinella bolivariana). His case for regarding griffinae as ancestral to bolivariana is clear
from the SEM illustrations of the two species (his pl. 150, figs. 1-9) as they both share a sacculifer-type reticulate wall texture. The illustration ofparatypes from
other levels in KANE 9 Core 42 (his pl. 157, fig. 7, from
95 cm; pl. 162, figs. 8,9, from 42 cm; pl. 165, figs. 1-3,
from 15 cm), however, clearly differ from the holotype
and paratypes of the species illustrated from the type
level of the holotype. These paratypes differ in having
a more coarsely cancellate, non-reticulate wall texture
and a thickened, continuous apertural lip. The test is
more compact and subquadrate in shape, in contrast to
P. griffinae. These morphotypes are the basis for the
new species, Paragloborotalia griffinoides. Toumarkine
and Luterbacher (1985) and Warraich and Ogasawara
(2001) also included morphotypes like these in griffinae
(which were placed by them in Turborotalia, fig. 27: 19-
23 and fig. 5: 13, 14,18, respectively). P. griffinoides is
a common and widespread form in the Eocene and its
stratigraphic range is from lower to upper Eocene.
PHYLOGENETIC RELATIONSHIPS.- The genus
Paragloborotalia arose through the development of P.
griffnoides from Parasubbotina varianta in Zone PS.
The close relationship of P griffinoides and P. varianta
is clearly seen in specimens from Zone El in the Bass
River Borehole, New Jersey (Pls. 5.7 and 5.13). The
two species are linked by transitional morphotypes that
show a range of test morphology from the inflated,
compact, subquadrate test of P. griffinoides to the more
loosely coiled, less inflated test of P. varianta.
GEOGRAPHIC DISTRIBUTION.- P. griffinoides seems to have preferred cold-water high productivity environments and is generally absent from deep-sea oligotrophic settings.
STABLE ISOTOPE PALEOBIOLOGY.- Recorded (as P. wilsoni) by Pearson and others (2001) with consistently positive ò18O and strongly depleted ò13C indicating a deep planktonic habitat. |
| Systematics: |
35
Ordo Foraminiferida
Superfamilia Globigerinaceae
Familia Globigerinidae
Genus Paragloborotalia
Species Paragloborotalia griffinoides
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| Synonym list: |
Pearson et al. (2006):
1957 Globorotalia bolivariana Petters. - Bolli : p.169 pl. 37; fig. 14a-16 [Porticulasphaera mexicana Zone, Navet Fm.,
Trinidad]. [Not Petters, 1954.]
1972 Subbotina bolivariana Petters. - McKeel & Lipps : p.85 pl. 1; fig. 1a-c [middle Eocene, Tulee Fm., Coast
Ranges, Oregon]. [Not Petters, 1954.]
1977 Globorotaloides wilsoni Cole. - Poore & Brabb : p.263 pl. 2; fig. 10-13 [middle Eocene Zone E13, Twobar Shale
Member, San Lorenzo Fm., Santa Cruz mountains,
California]. [Not Cole, 1 927.]
p 1979 Globorotalia (Turborotalia) griffinae Blow. - Blow : p.1072 pl. 157, fig. 7 [Zone E8, KANE 9-Core 42,
Endeavour seamount, equatorial Atlantic Ocean];
pl. 162, fig. 8-9 [Zone E8, KANE 9-Core 42, Endeavour seamount, equatorial Atlantic Ocean];
pl. 165, fig. 1-3 [Zone E8, KANE 9-C piston core, Endeavour seamount, equatorial Atlantic Ocean] [Not Blow, 1979.]
1985 Turborotalia griffininae Blow. - Toumarkine & Luterbacher : p.127 fig. 27: 18 (reillustration of Blow 1979, pl. 165, fig. 2);
fig. 27: 19-23 [Middle Eocene, Bou Arada, Tunisia.] [Not Blow, 1979.]
1988 Globorotalia nana Bolli. - Poore & Bybell : p.18 pl. 5; fig. 9 [upper Eocene, Core ACGS # 4, New Jersey Coastal
Plain]. [Not Bolli, 1957b.]
1995 "Hastigerina" bolivariana Petters. - Poag & Commeau : p.144 pl. 4; fig. 22, 23 [middle Eocene, Hammond
core, Maryland]. [Not Petters, 1954.]
2001 Turborotalia griffininae Blow. - Warraich & Ogasawara : p.23 fig. 5: 13, 14, 18 [Zone E10-12, Kirthar Fm., Sulaiman
Range, Pakistan]. [Not Blow, 1979.]
2006 Paragloborotalia n sp. griffinoides Olsson & Pearson. - Pearson et al. : p.85 pl. 5.7; fig. 1-19 (Pl. 5.7, Figs. 4-6: reillustration of paratypes of
Globorotalia (Turborotalia) griffinae Blow)
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| Specimen: |
Smithsonian Museum of Natural History, Washington, D.C., Inventory number: USNM 523424
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| References: |
Bolli,H.M. (1957):
Planktonic Foraminifera from the Eocene Navet and San Fernando formations of Trinidad, B.W.I. . Bull. U.S. natl. Mus. Vol. 215 p. 155-172
McKeel,D.R.. and Lipps,J.H. (1972):
Calcareous plankton from the Tertiary of Oregon . Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 12 p. 75-93
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
Blow,W.H. (1979):
The Cainozoic Globigerinida. 3 Vols p. 1413 pp
Toumarkine,M. and Luterbacher,H.P. (1985):
Paleocene and Eocene Planktic Foraminifera.
In: Plankton Stratigraphy p. 87-154
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
Poag,C.W.. and Commeau,J.A.. (1995):
Paleocene to middle Miocene planktic foraminifera of the southwestern Salisbury Embayment, Virginia and Maryland: biostratigraphy, allostratigraphy, and sequence stratigraphy . Journal of Foraminiferal Research Vol. 25 p. 134-155
Warraich,M.Y.. and Ogasawara,K.. (2001):
Tethyan Paleocene-Eocene planktic foraminifera from the Rakhi Nala and Zinda Pir land sections of the Sulaiman Range, Pakistan . Science Reports of the Institute of Geoscience University of Tsukuba, section B Vol. 22 p. 1-59
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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