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Species Globigerinatheka curryi Proto Decima & Bolli 1970


Diagnosis / Definition:
Pearson et al. (2006):
DESCRIPTION. Type of wall: Spinose, cancellate with pores about 0.08 mm in diameter. Test morphology: Test subglobular, with a subtriangular equatorial outline, two and a half whorls, inner spire low, composed of 6-7 small chambers increasing slowly in size as added, then increasing much faster becoming subspherical in the second whorl; 3 chambers in the last whorl, rapidly increasing with the penultimate chamber twice as large as the antepenultimate chamber, chambers globular except for the last which is hemispherical and appears smaller in spiral view due to its flattened shape. Coiling from low trochospiral to streptospiral with final few chambers covering previous whorl; sutures distinct even in the inner whorls, becoming progressively more depressed in the final stage. Primary aperture in the adult a low umbilical arch, two secondary low arched sutural apertures at the base of the last chamber above the sutures between the earlier chambers. Size: Greatest diameter of holotype 0.56 mm.
Discussion / Comments:
Pearson et al. (2006):
DISTINGUISHING FEATURES.- Globigerinatheka curryi is loosely coiled with deeply incised sutures and inflated chambers. It differs from G. kugleri by its longer initial spire with more numerous chambers and larger size; it differs from G. euganea by its shorter inner spire with fewer chambers, less numerous secondary apertures, less globular general shape, more moderate size of the last chambers and more distinct and depressed sutures especially in the outer whorl. Globigerinatheka curryi is morphologically close to G. lutep.bac?zeri from which it differs in having a lower spire resulting in a shape that is more subglobular. DISCUSSION.- The holotype of G. curryi was previously included by Bolli (1957) in G. kugleri, from which species, according to Proto Decima and Bolli (1970), it differs by its distinctly larger size, more robust wall and more restricted range. The specimens identified by Blow (1979) on his pl. 186, fig. 5 and pl. 192, figs. 2 and 3 as G. kugleri euganea are here included in G. curryi due to their subtriangular outline and the few supplementary apertures. PHYLOGENETIC RELATIONSHIPS.- Bolli (1972) considered both G. curryi and G. euganea as subspecies of G. subconglobata, although he also considered G. curryi to belong to the lineage leading to Orbulinoides beckmanni via G. euganea. In our opinion, G. curryi may have evolved from G. kugleri by decreasing the initial spire and number of chambers in final whorl, and thereby increasing chamber compaction. GEOGRAPHIC DISTRIBUTION.- This species is present in tropical to temperate regions, with large specimens only in tropical regions. STABLE ISOTOPE PALEOBIOL0GY.- No data available.
Systematics:

35
 Ordo Foraminiferida
  Superfamilia Globigerinaceae
   Familia Globigerinidae
    Genus Globigerinatheka
     Species Globigerinatheka curryi
Synonym list:
Pearson et al. (2006):
1966 Globigerapsis index Finlay. - Todd : pl. 2; fig. 1a-c [middle Eocene, Guam]. [Not Finlay, 1939]
1970 Globigerinatheka curryi Proto Decima & Bolli. - Proto Decima & Bolli : p.889 holotype pl. 36, figs. 21a-b in Bolli, 1957 as Globigerapsis kugleri Bolli, Loeblich and Tappan [middle Eocene Globorotulia lehneri Zone, Navet Fm., Trinidad]; pl. 1, figs. 1-4, text-figs. l -3a [middle Eocene Globorotalia lehneri Zone, Mount Hillaby River Section, Barbados]; text-figs. 38-39b [middle Eocene Globorotalia lehneri Zone, Cava Zillo, Euganei Hills, northern Italy]
1970 Globigerapsis cf. kugleri Bolli et al.. - Baumann : p.1189 pl. 1; fig. 13a-c [middle Eocene Globorotalia centralis Zone, Bottaccione Section, Gubbio, central Italy]; [Not Bolli, Loeblich and Tappan, 1957]
1971 Globigerapsis kugleri Bolli et al.. - Postuma : fig. at p. 139 [middle Eocene, Trinidad]; [Not Bolli, Loeblich and Tappan, 1957]
1972 Globigerinatheka subconglobata curryi Proto Decima & Bolli. - Bolli : p.132 pl. 1, fig. 14 [middle Eoccne Globigerinatheka subconglobata subconglobata Zone, Possagno Section, northern Italy]; text-fig. 27-30 (redrawn holotype)
? 1974 Globigerinatheka subconglobata curryi Proto Decima & Bolli. - Fleisher : pl. 8; fig. 8 [middle Eocene Zone P1l, DSDP Site 219, Arabian Sea]
1975 Globigerinatheka curryi Proto Decima & Bolli. - Toumarkine : pl. 4; fig. 11, 12 [middle Eocene Globorotalia lehneri Zone, DSDP Site 313, Mid Pacific Mountains]
1978 Globigerinatheka subconglobata curryi Proto Decima & Bolli. - Toumarkine : pl. 3; fig. 4-5 [middle Eocene Hantkenina aragonensis to Globorotalia lehneri Zone, DSDP Site 363, South Atlantic Ocean]
1979 Globigerapsis kugleri curryi Decima & Bolli. - Blow : p.1147 pl. 174, fig. 9 [middle Eocene Zone P ll, Kilwa area, Tanzania]; pl. 181, fig. 5; pl. 183, figs. 3,4; pl. 185, ?fig. 5 [middle Eocene Zone P1 l, DSDP Site 21A, South Atlantic Ocean]
1979 Globigerapsis kugleri euganea Decima & Bolli. - Blow : pl. 186, fig. 5 [middle Eocene Zone P1 2, DSDP Site 19, South Atlantic Ocean]; pl. 192, figs. 2, 3 [middle Eocene Zone P13, Kilwa area, Tanzania] [Not Proto Decima and Bolli, 1970]
1983 Globigerinatheka subconglobata curryi Proto Decima & Bolli. - Toumarkine : pl. 21, fig. 11-12 (from Proto Decima and Bolli, 1970); figs. 13-14 [middle Eocene Morozovella lehneri Zone, DSDP Site 3 13, Mid Pacific Mountains]; fig. 15 [middle Eocene Morozovella lehneri Zone, Baluchistan, Pakistan]
2006 Globigerinatheka curryi Proto Decima & Bolli. - Pearson et al. : p.181 pl. 7.3; fig. 1-8 (Pl. 7.3, Figs. 1,2: new SEMs of holotype of Globigerinatheka curryi Proto Decima and Bolli)
Specimen:
Smithsonian Museum of Natural History, Washington, D.C., Inventory number: USNM P5727
References:

Todd,R. (1966):
Smaller Foraminifera from Guam . U. S. Geological Survey, Professional Paper403-1 p. 1-36

Baumann,P.. (1970):
Mikropalaentologische und stratigraphische Untersuchungen der obereozaenen-oligozaenen Scaglia im zentralen Apennin (Italien) . Eclogae Geologicae Helvetiae Vol. 63 p. 1133-1211

Proto Decima,F. and Bolli,H.M. (1970):
Evolution and variability of Orbulinoides beckmanni (Saito) . Ecoglae geologicae Helvetiae Vol. 63 p. 883-905

Postuma,J.A. (1971):
Manual of Planktonic Foraminifera. p. 422 pp

Bolli,H.M. (1972):
The Genus Globigerinatheka Brönnimann . Journal of Foraminiferal Research Vol. 2 p. 109-136

Fleisher,R.L. (1974):
Cenozoic planktonic foraminifera and biostratigraphy, Arabian Sea, Deep Sea Drilling Project, Leg 23A.
In: Initial Reports of the Deep Sea Drilling Project Vol. 23 Eds: Whitmarsh, R.B.Weser, O.E.Ross, D.A. p. 1001-1072

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

Toumarkine,M. (1978):
Planktonic Foraminiferal Biostratigraphy of the Paleogene of Sites 360 to 364 and the Neogene of Sites 362A, 363, and 364 Leg 40.
In: Initial Results of the Deep Sea Drilling Project Vol. 40

Blow,W.H. (1979):
The Cainozoic Globigerinida. 3 Vols p. 1413 pp

Toumarkine,M. (1983):
Les Foraminiferes planctoniques de l'Eocéne moyen et supérieur des regions tropicales à temperées chaudes.
In: Thése de Doctorat d'Etat ès Sciences Vol. 6(83-05) p. 219

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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