Acarinina collactea Finlay 1939 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 Acarinina collactea Finlay 1939 |
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| Diagnosis / Definition: |
Pearson et al. (2006):
DESCRIPTION.
Type of wall: Nonspinose; normal perforate;
densely muricate on both sides.
Test morphology: Test low-trochospiral, 5
subangular, essentially equal sized chambers in last
whorl, separated by straight radial to weakly curved
intercameral sutures; umbilicus narrow, deep; aperture
a low, arched slit along the base of the last chamber;
weakly convex to flat; about 12 rounded chambers in
three whorls on the spiral side; sutures radial, straight to
weakly curved; minute intercameral openings visible at
chamber junction margins on some well-preserved
specimens; rounded to subangular peripheral margin in
edge view.
Size: Maximum diameter of holotype 0.18 mm,
thickness 0.13 mm. |
| Discussion / Comments: |
Pearson et al. (2006):
DISTINGUISHING FEATURES.-
This taxon is
distinguished by its small size (-0.25-0.30 mm in
maximum diameter), 5-chambered and compact
(involute) test. Acarinina medizzai is morphologically
similar to, and probably descended from, A. collactea.
The moderately muricate medizzai may be distinguished
from collactea in having a smaller (generally less than
0.2 mm in diameter), lower trochospiral test and more
restricted aperture.
DISCUSSION.-
This is one of the most distinct and
ubiquitous components of middle Eocene planktonic
foraminiferal assemblages. Distinguished by its small
size and compact, densely muricate test with irregularly
distributed minute "openings" on the spiral side, it is a
familiar and particularly common form in mid-high
latitude assemblages.
This form has been thoroughly studied and
documented by Jenkins (1965a) who re-examined Finlay's original type material. Blow (1 979, p. 920) noted
that the suturally-located openings on the spiral side do
not appear to be functional supplementary apertures and
may owe their origin to the "stand off" effect of late
stage calcification preventing smooth junction of
adjacent chambers owing to the development of
previously calcified muricae in the intervening space(s).
The form identified by Bolli (1957a) as
Globorotalia spinuloinflata (Bandy) is a subangular
variant of the generally more rounded collactea and
included here in the synonomy of collactea. In the former
Soviet Union collactea has been identified as Acarinina
rotundimurginata Subbotina from the middle Eocene of
the N. Caucasus. We specifically exclude from collactea
the ovate, sinistrally coiled specimens identified by
Brönnimann (1 952) and Postuma (197 1) from the lower
Eocene (Zone P6b) of Trinidad. Acarinina collactea is
generally subcircular in outline, dextrally coiled and
restricted to stratigraphicafy younger levels. The
possible extension of this taxon into upper Eocene levels
in high latitudes remains controversial.
PHYLOGENETIC RELATIONSHIPS.-
Ancestry
uncertain; possibly descended from A. pentacamerata; this morphospecies probably evolved into A. medizzai.
STRATIGRAPHIC RANGE.-
Zone E7 to Zone E14.
On the Kerguelen Plateau collactea disappears at a
stratigraphic level possibly correlative with
Magnetochron C17n (~/= to Zones NP17/18=P 15; - 37
Ma; near the Bartonian/Priabonian = middle/late Eocene
boundary; Berggren, 1992, p. 556, 557). Earlier, the
record from the Sovind Marl in Denmark (Berggren,
1969) suggested extension to the Priabonian/late Eocene
(Isthmolithus vecurvus Zone =NP 19/20).
GEOGRAPHIC DISTRIBUTION.-
As the synonymy
given above indicates, this taxon has an essentially cosmopolitan distribution, having been recorded from
latitudes in excess of 50° in both the northern (Denmark,
NW Germany) and southern (Kerguelen Plateau and
Maud Rise) hemispheres.
STABLE ISOTOPE PALEOBIOL0GY.-
No data
available.
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| Systematics: |
1
Superregnum Eukaryota
Regnum Protoctista
Phylum Ciliophora
Subphylum Postciliodesmatophora
Ordo Globigerinida
Superfamilia Globorotaliaceae
Superfamilia Nonionacea
Familia Truncorotaloididae
Genus Acarinina
Species Acarinina collactea
35
Ordo Foraminiferida
Superfamilia Globigerinaceae
Familia Truncorotaloididae
Genus Acarinina
Species Acarinina collactea
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| Synonym list: |
Pearson et al. (2006):
1939 Globorotalia collactea Finlay. - Finlay : p.327 pl. 29; fig. 164, 165 [middle Eocene, Hampden Beach, North Otago, New Zealand)
non 1952 Globigerina collactea Finlay. - Brönnimann : p.13 pl. 1; fig. 13-15 [G. aragonensis Zone, Ramdat Marl,
Navet Fm. (= upper Lizard Springs Fm., see Bolli,
1957a:64, south-east Trinidad]
1953 Acarinina rotundimarginata Subbotina. - Subbotina : p.234 pl. 25; fig. 1a-c (holotype), 2a-3c [middle Eocene Zone of thin-walled
pelagic foraminifera, Bura Group, Kuban River section,
north Caucasus]
non 1957 Globigerina collactea Finlay. - Bolli : p.72 pl. 15; fig. 21-23 [G. rex Zone, upper Lizard Springs Fm.,
Trinidad]
non 1957 Globigerina collactea Finlay. - Bolli : p.162 pl. 35; fig. 18a-b [G.
palmerae Zone, Navet Fm., Trinidad]
1960 Truncorotaloides rotundimarginata Subbotina. - Berggren : p.53 pl. 1; fig. 19a, b [middle Eocene, approximately
equivalent to Zones P10/11, Otta borehole, western
Nigeria]
1961 Globigerina collactea Finlay. - Hornibrook : p.149 [middle Eocene, Hampden Beach, North Otago, New
Zealand]
1970 Truncorotaloides collactea Finlay. - Samanta : p.206 pl. 3; fig. 15-17 [Orbulinoides beckmanni Zone, Lakhpat, Cutch,western India]
1971 Truncorotaloides collactea Finlay. - Jenkins : p. 134, 135 pl. 14; fig. 402-404 (holotype reillustrated), 405-407 (paratypes) [middle Eocene, Hampden Beach, North Otago, New Zealand]
non 1971 Globigerina collactea Finlay. - Postuma : p.147 text-fig. on p. 147 [G. formosa formosa
Zone, Trinidad]
1972 Truncorotaloides collactea Finlay. - McKeel & Lipps : p. 82, 83 pl. 1; fig. 5a-c [lower
middle Eocene upper Tyee Fm., Ulatisian Stage, Oregon
Range]
1977 Truncorotaloides collactea Finlay. - Poore & Brabb : p.269 pl. 5; fig. 5-7 [Zone P 1311 4
equivalent, Butano Sandstone Fm., Santa Cruz Mountains,
California]
1979 Globorotalia (Acarinina) collactea Finlay. - Blow : p.919 pl. 172, fig. 7-9 [Zone P1 1, sample RS. 24, Kilwa area, Tanzania];
pl. 194: fig. 1-4 [Zone P13, Sample RS. 3 11,
Kilwa area, Tanzania]
1985 Truncorotaloides collactea Finlay. - Toumarkine & Luterbacher : p.132 fig. 6, 7, 9 (re-illustrations from the literature; incorrect reference made to Jenkins, 1985, Chapter 7 for illustrations)
1986 Truncorotaloides collactea Finlay. - Jenkins & Srinivasan : p.824 pl. 5; fig. 11, 12 [G. aculeata Zone, DSDP Site 592, Lord Howe Rise, south-west Pacific Ocean]
1988 Truncorotaloides collactea Finlay. - Poore & Bybell : p.20 pl. 5; fig. 7, 8 [Turborotalia pomeroli/T. cerroazulensis
Zone, Mansquan Fm., Core ACGS #4, New
Jersey]
1990 Acarinina collactea Finlay. - Stott & Kennett : p.559 pl. 6; fig. 7, 8 [Zone AP8, ODP Hole 689B, Maud Rise,
Antarctic Ocean]
1991 Acarinina collactea Finlay. - Huber : p.439 pl. 3; fig. 16, 17 [Zone AP 10, Hole 738B, Kerguelen Plateau, southern
Indian Ocean]
1992 Acarinina collactea Finlay. - Berggren : p.563 pl. 2; fig. 13-15 [middle Eocene A. collactea Zone, ODP Hole 748C,
Kerguelen Plateau, southern Indian Ocean]
1993 Acarinina collactea Finlay. - Lu & Keller : p.103 pl. 3; fig. 12-13 [lower Eocene Zone
AP7, ODP Hole 738C, Kerguelen Plateau, southern Indian
Ocean]
2006 Acarinina collactea Finlay. - Pearson et al. : p.278 pl. 9.8; fig. 1-16 (Pl. 9.8, Figs. 1-7: new SEMs of holotype and paratypes of Globorotalia collactea Finlay)
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| Specimen: |
New Zealand Geological Survey Collection - Lower Hutt, New Zealand, Inventory number: TF 1150/1
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| References: |
Finlay,H.J. (1939):
New Zealand foraminifera: key species in stratigraphy No. 2 . Trans. Proc. R. Soc. N.Z. Vol. 69 p. 89-128
Brönnimann,P. (1952):
Trinidad Paleocene and lower Eocene Globigerinidae . Bulletins of American paleontology Vol. 34(143) p. 1-34
Subbotina,N.N. (1953):
Iskopaemye foraminifery SSSR (Globigerinidy, Khantkenininidy i Globorotaliidy) . Trudy Vsesoyznogo Nauchno-Issledovatel'skogo Geologo-razvedochnogo Instituta (VNIGRI) Vol. 76 p. 296
Bolli,H.M. (1957):
The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82
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
Berggren,W.A. (1960):
Some planktonic Foraminifera from the Lower Eocene (Ypresian) of Denmark and northwestern Germany . Stockholm Contribution in Geology Vol. 5 p. 41-108
Hornibrook,N. (1961):
Tertiary foraminifers from Oamaru District (N.Z.), Part 1.Systematics and distribution . New Zealand Geological Survey Paleontological Bulletin Vol. 34
Jenkins,D.G. (1965):
A re-examination of Globorotalia collactea Finlay, 1939 . New Zealand Journal of Geology and Geophysics Vol. 8 p. 843-848
Berggren,W.A. (1969):
Paleogene Biostratigraphy and Planktonic Foraminifera of Northwestern Europe.
In: Proceedings of the First International Conference on Planktonic Microfossils Vol. 1 Eds: Brönnimann, P.Renz, H.H. p. 121-160
Samanta,B.K. (1970):
Middle Eocene Planktonic Foraminifera from Lakhpat, Cutch, Western India . Micropaleontology Vol. 16
Jenkins,D.G. (1971):
New Zealand Cenozoic Planktonic Foraminifera . New Zealand Geological Survey Paleontological Bulletin Vol. 42
Postuma,J.A. (1971):
Manual of Planktonic Foraminifera. p. 422 pp
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
Berggren,W.A. (1977):
Atlas of Paleogene planktonic foraminifera. Some species of the genera Subbotina, Planorotalites, Morozovella, Acarinina and Truncorotaloides.
In: Oceanic Micropaleontology Eds: Ramsay, A.T.S. p. 205-299
Blow,W.H. (1979):
The Cainozoic Globigerinida. 3 Vols p. 1413 pp
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
Toumarkine,M. and Luterbacher,H.P. (1985):
Paleocene and Eocene Planktic Foraminifera.
In: Plankton Stratigraphy p. 87-154
Jenkins,D.G. and Srinivasan,M.S. (1986):
Cenozoic planktonic foraminifera from the equator to the subantarctic of the southwest Pacific.
In: Init. Rep. Deep Sea Drilling Project Vol. 90(2) Eds: Haq, B.U..von Rad, U..et al. p. 795-834
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 p. 549-569
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. (1992):
Paleogene Planktonic Foraminifera Magnetobiostratigraphy of the Southern Kerguelen Plateau (Sites 747-749).
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 120
Lu,G. and Keller,G. (1993):
The Paleocene-Eocene Transition in the Antarctic Indian Ocean: Inference from Planktic Foraminifera . Marine Micropaleontology Vol. 21 p. 101-142
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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