Orbulinoides beckmanni Saito 1962 (TaxonConcept

Anonymous: Unedited TaxonConcept data

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Species Orbulinoides beckmanni Saito 1962

Diagnosis / Definition:

Pearson et al. (2006):
DESCRIPTION. Type of wall: Spinose, cancellate. Test morphology: Test almost spherical, early chambers in low trochospiral , then streptospirally coiled and increasingly larger with a very large, hemispherical last chamber enveloping the previous whorls and covering the umbilical area formed by the previous chambers. Sutures radial, slightly depressed in the early coil, depressed in the adult stage. Primary aperture umbilical - extraumbilical in the early stage, in later stage single primary aperture replaced by smaller multiple, irregularly arched, sutural apertures developed at the base of the last chambers; numerous spiral supplementary apertures in the early coils; the last one or two chambers may possess areal apertures. Small bullae or some irregular bulla-like structures may also be present. Size: Dimensions: 0.50-0.60 mm.

Discussion / Comments:

Toumarkine & Luterbacher (1985):
The genus Orbulinoides is monotypic. Orbulinoides diners from Globigerinatheka in possessing spiral areal apertures in the large globular end-chamber which connect via vestibules with apertures of the covering thick wall. Orbulinoides possesses a larger number of sutural apertures in the last two or three chambers and it may have areal apertures in the last chambers which are not known in Globigerinatheka, 0. beckmanni has a similarly large test (0.4 to 0.7 mm) as the large species of Globigerinatheka (G. subconglobata euganea and G. subconglobata luterbacheri) but it can be differentiated from them by the almost spherical shape of the test and the final chamber which strongly embraces the umbilical region and the multiple sutural openings.
Pearson et al. (2006):
DISTINGUISHING FEATURES.- Orbulinoides beckmanni is distinctive due to its spherical test with numerous small secondary apertures. It differs from its ancestor Globigerinatheka euganea as well as from the other globigerinathekids by possessing a well-developed inner spire and a greater number of sutural supplementary apertures along the inner spire. DISCUSSION.- The holotype chosen by Saito (19621, here refigured in P1. 7.10, Figs. 1-3, falls within the variability of 0 . beckmanni as the last chamber possesses numerous supplementary apertures at its base; however' the enveloping degree of the early chambers of the outer whorl by the last chamber is moderate, resulting in a less compact shape instead of a spherical shape as in specimens illustrated in P1.7.11, Figs. 4- 16; in addition, the sutural supplementary apertures are poorly visible in the early chambers. While the presence of areal supplementary apertures is further confirmed (see Pl. 7.11, Fig. 15), we do not have any evidence that the sutural supplementary apertures open into vestibules as described by Cordey (1968) and Proto Decima and Bolli (1970). The specimens illustrated by Blow (1979) as Globigerapsis beckmanni in pl. 192, figs. 6-9 do not represent the beckmanni stage, because they lack multiple sutural supplementary apertures even at the base of the last chamber (see Blow, 1979, p. l 138) and in our opinion they fall within the variability of G. euganea. PHYLOGENETIC RELATIONSHIPS.- Proto Decima and Bolli (1 970) indicated that Orbulinoides beckmanni is the end member of the lineage curryi-euganea-beckmanni. STRATIGRAPHIC RANGE.- Orbulinoides beckmanni has a restricted stratigraphic range, confined to the middle Eocene Zone E12 (P13) (Orbulinoides beckrnanni Zone). GEOGRAPHlC DISTRIBUTION.- Tropical to warm mid latitudes. STABLE ISOTOPE PALEOBIOL0GY.- No data available.

Systematics:

15
Classis Foraminifera
  Genus Orbulinoides
   Species Orbulinoides beckmanni

35
  Ordo Foraminiferida
   Superfamilia Globigerinaceae
    Familia Globigerinidae
     Genus Orbulinoides
      Species Orbulinoides beckmanni

Synonym list:

Toumarkine & Luterbacher (1985):

1962 Porticulasphaera beckmanni Saito. - Saito : 221-222 pl 34 figs 1a-c (type reference)

1985 Orbulinoides beckmanni Saito. - Toumarkine & Luterbacher : 141, 147 figs 37.3, 40.1-6

Pearson et al. (2006):

p 1953 Globigerinoides mexicana Cushman. - Beckmann : p.393 pl. 25 (partim); fig. 17-19 (not figs. 1 5, 16 = G. euganea); [middle Eocene, Oceanic Fm., Barbados]; [Not Cushman, 1925]

1957 Porticulasphaera mexicana Cushman. - Bolli et al. : p. 34-35 pl. 6; fig. 8-9b [middle Eocene Orbulinoides beckmanni Zone, Navet Fm. Trinidad]

1957 Porticulasphaera mexicana Cushman. - Bolli : p.165 pl. 37; fig. 1a-b [middle Eocene, Orbulinoides beckmanni Zone, Navet Fm., Trinidad]; [Not Cushman, 1925]

1962 Porticulasphaera beckmanni Saito. - Saito : p.221 pl. 34; fig. 1a-c [Eocene, Hahajima, Hillsborough Island, Japan]

1968 Orbulinoides beckmanni Saito. - Cordey : p. 371-375 text-fig. 1a-d [Eocene Orbulinoides beckmanni Zone, Navet Fm., Point-a-Pierre, Trinidad]

1970 Orbulinoides beckmanni Saito. - Proto Decima & Bolli : p.899 text-fig. 16-30, 32-37; pl. 1, fig. 12; pl. 2, fig. 8, 11 [middle Eocene Orbulinoides beckmanni Zone, (text-figs. 32-34, 36, S 205), Mount Hillaby River Section, Barbados]

1970 Orbulinoides beckmanni Saito. - Mohan & Soodan : pl. 2; fig. 11a-b [middle Eocene Orbulinoides beckmanni Zone, Kutch, India]

1970 Orbulinoides beckmanni Saito. - Samanta : pl. 2; fig. 22-23 [middle Eocene Orbulinoides beckmanni Zone, Lakhpat, Cutch, India]

? 1970 Orbulinoides beckmanni Saito. - Baumann : pl. 3; fig. 2 [middle Eocene Orbulinoides beckmanni Zone, Bottaccione Section, Gubbio, central Italy]

1971 Orbulinoides beckmanni Saito. - Postuma : p.230 fig. on p. 231 [Trinidad]

1975 Orbulinoides beckmanni Saito. - Stainforth et al. : fig. 38.1a-b (from Bolli, 1957); fig. 38.4, 5, 8 (from Proto Decima and Bolli, 1970); figs. 38.2, 3-7, 9 [middle Eocene Orbulinoides beckmanni Zone, Oceanic Fm., Barbados]

1975 Orbulinoides beckmanni Saito. - Toumarkine : pl. 4; fig. 15, 16 [middle Eocene Orbulinoides beckmanni Zone, DSDP Site 3 13, Mid Pacific Mountains, Pacific]

1978 Orbulinoides beckmanni Saito. - Toumarkine : pl. 3; fig. 9-13 [middle Eocene Orbulinoides heckmanni Zone, DSDP Site 363, South Atlantic Ocean]

non 1979 Globigerapsis beckmanni Saito. - Blow : p. 1137-1138 pl. 192; fig. 6-9, ?fig. 5 [middle Eocene Zone P13, Kilwa area, Tanzania]; (= G. euganea)

1980 Orbulinoides beckmanni Saito. - Salaj : pl. 26; fig. 8 [middle Eocene Zone P 13, Enfidaville, Tunisia]

1983 Orbulinoides beckmanni Saito. - Toumarkine : pl. 21; fig. 1a-b (from Bolli and others, 1957), fig. 2a-b (from Bolli, 1957), fig. 3-4 (from Proto Decima and Bolli, 1970), figs. 5-6 (from Toumarkine, 1975)

2003 Orbulinoides beckmanni Saito. - Warraich & Nishi : pl. 2; fig. 9a-b [middle Eocene Zone P1 3, Zinda Pir West Section, Kirthar Fm., Sulaiman Range, Indus Basin, Pakistan]

2006 Orbulinoides beckmanni Saito. - Pearson et al. : p.203 pl. 7.11; fig. 1-16 (Pl. 7.1 1, Figs. 1-3: reillustration and new SEMs of holotype of Porticulasphaera beckmanni Saito)

Specimen:

Collection of the Tohoku University, Sendai, Japan , Inventory number: 79016
Collection of the Tohoku University, Sendai, Japan , Inventory number: 79017
Smithsonian Museum of Natural History, Washington, D.C., Inventory number: USNM P3902
Smithsonian Museum of Natural History, Washington, D.C., Inventory number: USNM P5728

References:

Beckmann,J.P. (1953):
Die Foraminiferen der Oceanic Formation (Eocaen-Oligocaen) von Barbados. KI. Antillen . Eclogae Geologicae Helvetiae Vol. 46 p. 301-412

Bolli,H.M.; Loeblich,A.R. and Tappan,H. (1957):
The Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae, and Globotruncanidae . U.S. National Museum Bull. Vol. 215 p. 3-50

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

Saito,T. (1962):
Eocene planktonic foraminifera from Hahajima (Hillsborough Island) . Trans. Proc. Paleontol. Soc. Japan, news series Vol. 45 p. 209-225

Cordey,W.G.. (1968):
A new Eocene Cassigerinella from Florida . Paleontology Vol. 11(3) p. 368-370

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

Samanta,B.K. (1970):
Middle Eocene Planktonic Foraminifera from Lakhpat, Cutch, Western India . Micropaleontology Vol. 16

Mohan,M.. and Soodan,K.S.. (1970):
Middle Eocene planktonic foraminiferal zonation of Kutch, India . Micropaleontology Vol. 16 p. 37-46

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

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

Stainforth,R.M.; Lamb,J.L.; Luterbacher,H.P.; Beard,J.H. and Jeffords,R.M. (1975):
Cenozoic planktonic foraminiferal zonation and characteristics of index forms . Paleontological ContributionsArticle 62 p. 425

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

Salaj,J. (1980):
Microbiostratigrayhie du Crétacé et du Paléogéne de la Tunisie septentrionale et orientale (hypostratotypes tunisiens) . Geologický Ústav Dionýza Stúra, Bratislava p. 238

Toumarkine,M. (1983):
Les Foraminiféres planctoniques de l'Eocène moyen et supérieur des régions tropicales a temperées chaudes. , Thése de Doctorat d'Etat ès Sciences Vol. 6(83-05) p. 219

Toumarkine,M. and Luterbacher,H.P. (1985):
Paleocene and Eocene Planktic Foraminifera.
In: Plankton Stratigraphy p. 87-154

Warraich,M.Y.. and Nishi,H.. (2003):
Eocene planktic foraminiferal biostratigraphy of the Sulaiman range, Indus Basin, Pakistan . Journal of Foraminiferal Research Vol. 33 p. 219-236

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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