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Chiloguembelina cubensis Palmer 1934 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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Anonymous: Unedited TaxonConcept data
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Species Chiloguembelina cubensis Palmer 1934


Diagnosis / Definition:
Pearson et al. (2006):
DESCRIPTION. Type of wall: Microperforate, surface texture finely pustulose on youngest chambers, later becoming faintly but distinctly costate in rows / striae aligned with the long axis of the test. Test morphology: Test biserial, elongate, subtriangular in outline, moderately expanding, periphery rounded rather than compressed; chambers increasing moderately in size, up to 15 in adult specimens; sutures depressed, perpendicular to slightly oblique to growth axis; aperture a low, moderately narrow to broad symmetrical arch centered or slightly off-center from the base of the final chamber, bordered on one side by a narrow collar that thickens away from its attachment point on the chamber face. Size: Length 0.18-0.25 mm, breadth 0.10 -0.15 mm.
Discussion / Comments:
Jenkins (1985):
C. cubensis ranges through the Middle Eocene to Late Oligocene; within its range in New Zealand it is the only Chiloguembelina. It has been recorded in South Australia and Victoria in the Late Eocene Oligocene (Carter, 1958; Ludbrook & Lindsay, 1969), and is also present at DSDP Leg 29 Site 277 (Jenkins, 1975) and Leg 40 Site 362A (Tournarkine, 1978). The extinction level of C. cubensis appears to be a widespread marker in the Late Oligocene.
Van Eijden & Smit (1991):
Remarks. Although rare in many lower and middle Oligocene 125-250-¦Ìm fractions, this species can be extremely abundant in the <125-¦Ìm fractions. In these sections its last occurrence seems to be just above the top of the /. opima Zone (P21), as it was found by Beckmann (1957) in the Caribbean. According to Palmer (1940), Renz (1948), Berm¨²dez (1949), Blow (1979), and Jenkins (1985), it may range into the upper Oligocene.
Pearson et al. (2006):
DISTINGUISHING FEATURES- Distinguished from Chiloguembelina ototara by presence of fine, discontinuous to continuous costae that are aligned parallel to the elongate axis of the test. DISCUSSION.- The type descriptions of both Guembelina garretti Howe and Guembelina barnardi Ansary refer to longitudinal striations on the test, hence both are probably referable to this taxon pending further study. Poore and Gosnell (1985) placed C. cubensis in Streptochilus based on observation of an internal plate connecting the foramina of all but the final two chambers. Resig (1993) tentatively reassigned C. cubensis to Chiloguembelina noting that its aperture is typically lower arched and the position of the internal plate is off-centered coinpared to species of Streptochilus. Observation of costae in this species may require use of an SEM. PHYLOGENETIC RELATIONSHIPS.- Probably evolved from C. ototara during the late Eocene. STRATIGRAPHIC RANGE.- Upper Eocene through upper Oligocene; Zone E10 - Zone 06. The oldest occurrence of this species was recorded from the middle Eocene (Zone E 10) of Tanzania (Pl. 16.3, Figs. 23-24). Beckmann (1 957) recorded the highest occurrence of C. cubenis in the Globorotalia opima opima Zone of Trinidad, and Berggren and others (1 995) placed its "last common occurrence" at the top of Subzone P2 1 a (=Zone 04) in mid-Chron 10, at 28.5 Ma. Although Pearson and Chaisson (1997) observed an abrupt extinction of C. cubensis on Ceara Rise, Hornibrook (1990) records continuous occurrences of C. cubensis into the upper Oligocene of New Zealand and lowermost Miocene of Chatham Island. Presence of this species in the equivalent of Zone 06 at ODP Holes 803D and 807A (Leckie and others, 1993) supports Hornibrook's (1 990) observations. GEOGRAPHIC DISTRIBUTION.- Cosmopolitan. STABLE ISOTOPE PALEOBIOLOGY- Poore and Matthews (1984) recorded this species as having amongst the most negative oxygen isotope ratios in an assemblage from DSDP Site 366, suggesting that it inhabited the surface mixed layer. Similarly, Barrera and Huber (1 99 1, 1993) recorded C. cubensis as having more negative oxygen isotope and more positive carbon isotope values than CO-occurring species in uppermost Eocene and lower Oligocene at ODP Site 738 (southern Indian Ocean). In contrast Wade and Kroon (2002) recorded oxygen isotope values similar to benthic foraminifera. REPOSITORY.- Cotypes deposited in the Palmer Collection, Museo Poey, Universidad de la Habana, Cuba.
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Heterohelicacea
       Superfamilia Nonionacea
        Familia Chiloguembelinidae
         Genus Chiloguembelina
          Species Chiloguembelina cubensis

22
  Subordo Globigerinina
   Familia Heterohelicidae
    Genus Chiloguembelina
     Species Chiloguembelina cubensis

35
  Ordo Foraminiferida
   Superfamilia Globigerinaceae
    Familia Chiloguembelinidae
     Genus Streptochilus
Synonym list:
Jenkins (1985):
1934 Guembelina cubensis Palmer. - Palmer : p.73 text-figs. 1-6 no holotype designated
1985 Chiloguembelina cubensis Palmer. - Jenkins : p.273 figs. 6.13; 5
Van Eijden & Smit (1991):
1934 Guembelina cubensis Palmer. - Palmer : p.74 figs. 1-6
1991 Chiloguembelina cubensis Palmer. - Van Eijden & Smit : p.120 pl. 2, figs. 1,2
Spezzaferri & Silva (1990):
1934 Guembelina cubensis Palmer. - Palmer : fig. 1-6
1934 Guembelina cubensis Palmer. - Palmer :
1990 Chiloguembelina cubensis Palmer. - Spezzaferri & Silva : p.250 pl. X; fig. 5a-9b
Pearson et al. (2006):
1934 Guembelina cubensis Palmer. - Palmer : p.74 fig. 1-6 [lower Oligocene, Palmer Station well 1163, Santa Clara Province, Cuba]
? 1939 Chiloguembelina garretti Howe. - Howe : p.61 pl. 8; fig. 14 [Eocene Cook Mountain Fm., Subinne River, Louisana]
? 1955 Chiloguembelina barnardi Ansary. - Ansary : p.77 pl. 2; fig. 26 [upper Eocene, Wadi Weseiyit, Egypt]
1957 Chiloguembelina cubensis Palmer. - Beckmann : p.89 pl. 21, fig. 21; text-fig. 14(5-8) [lower Oligocene, Cipero Fm., San Fernando, Trinidad]
1985 Streptochilus cubensis Palmer. - Poore & Gosnell : p.5 pl. 2; fig. 1-13 [lower Oligocene, DSDP Site 366A, central Atlantic Ocean; Eltanin Core E-67-128, Gulf of Mexico]
1990 Chiloguembelina cubensis Palmer. - Hornibrook : p.368 pl. 1; fig. 1-11 [lower and upper Oligocene, Cuba, Chatham Rise, Chatham Island, and New Zealand]
1993 Chiloguembelina cubensis Palmer. - Resig : p.241 pl. 1; fig. 1-8, 10, 13, 17 [uppermost Eocene-lower Oligocene Zones P17-P2la, ODP Site 807, Ontong Java Plateau, western Pacific Ocean]
2006 Chiloguembelina cubensis Palmer. - Pearson et al. : p.480 pl. 16.3; fig. 23-24
Quilty (1976):
1934 Chiloguembelina cubensis Palmer. - Palmer : p.74 text-figs. 1-6
1957 Chiloguembelina cubensis Palmer. - Beckmann : p.89 pl. 21, fig. 21
1976 Chiloguembelina cubensis Palmer. - Quilty : p.703 pl. 19, fig. 15
Was used in synonym list of:
Stratigraphy - absolute ages:
LAD: 28.5 ± 0 [Ma], Berggren et al. (1995)
References:

Palmer,D.K. (1934):
The foraminiferal genus Gümbelina in the Tertiary of Cuba . Mem. Soc. Cubana Hist. Nat. Vol. 8 p. 73-76

Howe,H.V. (1939):
Louisiana Cook Mountain Eocene Foraminifera. Louisiana Dep. Cons. . Geol. Surv. Bull. Vol. 14 p. 1-122

Ansary,S.E.. (1955):
Report on the foraminiferal fauna from the Upper Eocene of Egypt . Publications de l'Institut du Desert d'Egypte Vol. 6 p. 1-160

Beckmann,J.P. (1957):
Chiloguembelina Loeblich and Tappan and Related Foraminifera from the Lower Tertiary.
In: Studies in Foraminifera, United States National Museum Bulletin Vol. 215 Eds: Loeblich, A.R.et al. p. 83-95

Quilty,P.G.. (1976):
Planctonic foraminifera DSDP Leg 34- Nazca Plata . DSDP initial reports Vol. 34

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

Poore,R.Z. and Gosnell,L.B.. (1985):
Apertural features and surface texture of upper Paleogene biserial planktonic foraminifers; Links between Chiloguembelina and Streptochilus . Journal of Foraminiferal Research Vol. 15 p. 1-5

Spezzaferri,S. and Silva,I.S.. (1990):
Oligocene planktonic foraminiferal biostratigraphy and paleoclimatic interpretation from Hole 538A, DSDP Leg 77, Gulf of Mexico . Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 83 p. 217-263

Hornibrook,N. (1990):
Chiloguembelina cubensis (Palmer) and C. ototara (Finlay), in New Zealand . Journal of Foraminiferal Research Vol. 20 p. 368-371

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123

Resig,J.M.. (1993):
Cenozoic stratigraphy and paleoceanography of biserial planktonic foraminifers, Ontong Java Plateau .
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 130 Eds: Berger, W.H.Kroenke, L.W..Mayer, L.A..and others p. 231-244

Berggren,W.A.; Kent,D.V.; Swisher,C.C. and Aubry,M.P. (1995):
A revised Cenozoic Geochronology and Chronostratigraphy.
In: Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication Vol. 54

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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