Gumbelina globulosa striatula Marie 1941 = Guembelina globulosa striatula Marie 1941
Guembelina ultimatumida
Guembelina ventilabrelliformis
Taxonomic discussion: Illustration in E+M online catalogue not very good. Georgescu & Huber. 2009, p.87: ""Heterohelix" globulosa displays globular chambers overlapping at low rates, in contrast with any species of Planoheterohelix. This suggests that it is related to "H." reussi (Cushman, 1938)." [copied from Chronos database]
Type images:
neotype: T. globulosa
topotype: T. globulosa
topotype: T. globulosa
topotype: T. globulosa
topotype: T. globulosa
topotype: T. globulosa
Original description: Translation from Latin: Shell microscopic, surface smooth, longer than larger in the adult, chambers globular.
Emended description: Georgescu & Huber. 2009, p.87: "Test is biserial throughout, with small proloculus (10-13 microns) followed by 11-16 globular, and gradually increasing in size chambers. Sutures are depressed and straight to slightly curved. Periphery is broadly rounded. Aperture is an interiomarginal, low- to medium-high arch, bordered by two small, symmetrically developed flanges. Chamber surface is ornamented with fine costae (2.2-3.5 microns). Test wall is calcareous, hyaline, and microperforate; pore diameter ranges 0.5-0.7 microns." Haynes, 2015, p. 55: Test is moderate in size, ranging from 161 to 300 microns (n = 11) in length with 9 to 14 biserially arranged chambers. Proloculus is moderately sized, averaging 22 microns in diameter among the 10 specimens measured, with subsequent globular to subglobular chambers increasing slowly in size. In side view the test is subtriangular in outline and weakly tapered, and in edge view the test is slightly compressed. Sutures are straight to slightly curved, moderately depressed, and meet the central axis at an oblique angle. Aperture is a medium to low-arched, symmetrical semicircular arch formed at the base of the final chamber, and is commonly bordered by either symmetrical flanges or an apertural lip. Test wall is calcitic, hyaline, and ornamented with costae that are expressed variably in terms of continuity and thickness but are generally fine and continuous (average thickness = 2.6 microns, n = 6). Test wall is microperforate with an average pore diameter of 0.8 microns (n = 1). [copied from Chronos database]
Character matrix
test outline:
Subtriangular
chamber arrangement:
Biserial
edge view:
Compressed
aperture:
Interiomarginal
sp chamber shape:
Globular
coiling axis:
N/A
periphery:
N/A
aperture border:
Thin lip
umb chbr shape:
Globular
umbilicus:
N/A
periph margin shape:
Broadly rounded
accessory apertures:
N/A
spiral sutures:
Strongly depressed
umb depth:
N/A
wall texture:
Finely costate
shell porosity:
-
umbilical or test sutures:
Strongly depressed
final-whorl chambers:
2-2
N.B. These characters are used for advanced search. N/A - not applicable
Geological Range: Last occurrence (top): within P. hariaensis zone (66.39-67.64Ma, top in Maastrichtian stage). Data source: [copied from Chronos database] First occurrence (base): within R. cushmani zone (94.03-98.69Ma, base in Cenomanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Ehrenberg, C. G. (1840). Uber die Bildung der Kreidenfelsen und des Kreidemergels durch unsichtbare Organismen. Physik. Abh. (1838), Berlin. 59-147. gs
Eicher, D. L. & Worstell, P. (1970). Lunatriella, a Cretaceous heterohelicid foraminifer from the western interior of the United States. Micropaleontology. 16(1): 117-121. gs
Georgescu, M. D. & Huber, B. T. (2009). Early evolution of the Cretaceous serial planktic foraminifera (late Albian-Cenomanian). Journal of Foraminiferal Research. 39: 335-360. gs
Georgescu, M. D. (1995). Upper Cretaceous Heterohelicidae in the Romanian Western Black Sea offshore. Revista Española de Micropaleontología. 27: 91-106. gs
Nederbragt, A. J. (1991). Late Cretaceous biostratigraphy and development of Heterohelicidae (planktic foraminifera). Micropaleontology. 37: 329-372. gs
Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gsO
Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gsO
Planoheterohelix globulosa compiled by the pforams@mikrotax project teamviewed: 14-9-2024
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Le Coze
146
Aug 2017
Le Coze(France)
Hello,
Guembelina (Pseudoguembelina) striata anfracta Geodakchan & Aliyulla 1965 = Heterohelix (Pseudoguembelina) striata anfracta (Geodakchan & Aliyulla 1965) in the synonymy should be given as Guembelina (Pseudoguembelina) striata anfracta (Geodakchan & Aliyulla 1965) = Heterohelix (Pseudoguembelina) striata anfracta Geodakchan & Aliyulla 1965. The subspecies was published under Heterohelix (Pseudoguembelina).
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Pessagno 1967 pl78 04-5.JPG
Pessagno 1967 pl87 06-7.JPG
Pessagno 1967 pl87 11-13.JPG
Pessagno 1967 pl88 03-4.JPG
Pessagno 1967 pl88 05.JPG
Pessagno 1967 pl88 06-7.JPG
ODP Site 1050-156~b.JPG
Nederbragt 1991_2f2-156.JPG
Smith and Pessagno 1973_3f8-11-156.JPG
ODP Leg 174-156~b.JPG
Ehrenberg_f2 5 7 8-156.JPG
DSDP Site 511-156.JPG
Eicher Worstell 1970_8f3-156.JPG
Georgescu 1995_1f1-2-156.JPG
Nederbragt 1991_2f1-156.JPG
ODP Leg 174-156~a.JPG
ODP Site 1050-156~a.JPG
Pessagno 1967 pl98 16.JPG
Seymour Island-156.JPG
Comments (1)
Hello,
Guembelina (Pseudoguembelina) striata anfracta Geodakchan & Aliyulla 1965 = Heterohelix (Pseudoguembelina) striata anfracta (Geodakchan & Aliyulla 1965) in the synonymy should be given as Guembelina (Pseudoguembelina) striata anfracta (Geodakchan & Aliyulla 1965) = Heterohelix (Pseudoguembelina) striata anfracta Geodakchan & Aliyulla 1965. The subspecies was published under Heterohelix (Pseudoguembelina).
Best wishes,
François