pforams@mikrotax - Sigalia deflaensis

Sigalia deflaensis


Classification: pf_mesozoic -> Heterohelicidae -> Sigalia -> Sigalia deflaensis
Sister taxa: S. carpatica, S. decoratissima, S. deflaensis, S. rugocostata, S. sp.

Taxonomy

Citation: Sigalia deflaensis (Sigal, 1952)
Rank: Species
Basionym: Guembelina deflaensis Sigal, 1952
Synonyms:

Type images:

Original description: caractérisée par l'ornementation des loges et les sutures du milieu du test légèrement en relief, est un bon repère du sommet de l'étage D, peut-etre est-ce du Coniacien ; nous ne l'avons jamais observée au-dessus des bancs à Inoceramus siccensis.

Entries in the Catalog of original descriptions: Guembelina deflaensis, Guembelina conjakica, Guembelina malocaucasica, Gublerina primitiva


Emended description:

Salaj and Samuel, 1963, op. cit., p. 105. (Translation from the Slovak). Test calcareous, biserial for its whole length, 5 to 7 chambers in each row. Chambers on both side compressed and peripherally embracing. Sutures limbate and in well developed individuals gently rise above the surface of the chambers or are on the same plane with them. Test surface can be decorated with delicate striations, which are well visible especially in the proximal part of the test, in the distal part only at great magnification, or fade out completely. Aperture semicircular, at the base of the last chamber. Height 0.29-0.34 mm., width 0.16-0.24 mm., thickness 0.07-0.10 mm. Original description written in French in Ellis and Messina. REMARKS: description emended by Salaj and Samuel 1963. [copied from Chronos database]

Morphology:

Wall type:

Size:

Character matrix
test outline:Triangularchamber arrangement:Biserialedge view:Compressedaperture:
sp chamber shape:N/Acoiling axis:N/Aperiphery:N/Aaperture border:N/A
umb chbr shape:N/Aumbilicus:N/Aperiph margin shape:N/Aaccessory apertures:None
spiral sutures:Weakly depressedumb depth:N/Awall texture:Meridional costellaeshell porosity:
umbilical or test sutures:Weakly depressedfinal-whorl chambers:5.0-7.0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): at top of D. asymetrica zone (99% up, 84.2Ma, in Santonian stage). Data source: PETRIZZO, M. R., JIMÉNEZ BERROCOSO, A., FALZONI, F
First occurrence (base): near base of D. asymetrica zone (10% up, 86.5Ma, in Coniacian stage). Data source:

Plot of range and occurrence data:

References:

Honigstein, A., Almogi-Labin, A. & Rosenfeld, A. (1987). Combined ostracod and planktonic foraminiferal biozonation of the Late Coniacian - Early Maastrichtian in Israel. Journal of Micropalaeontology. 6(2): 41-60. gs V O

Nederbragt, A. J. (1991). Late Cretaceous biostratigraphy and development of Heterohelicidae (planktic foraminifera). Micropaleontology. 37: 329-372. gs

Sigal, J. (1952). Apercu stratigraphique sur la micropaleontologie du Cretace. XIX Congr. géol. internat., Algers, Monographies Regionales. 1(26): 3-43. gs


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Sigalia deflaensis compiled by the pforams@mikrotax project team viewed: 28-9-2022

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