pforams@mikrotax - Sigalia pforams@mikrotax - Sigalia


Classification: pf_mesozoic -> Heterohelicidae -> Sigalia
Sister taxa: Heterohelix, Spiroplecta ⟩⟨ Braunella, Hendersonites, Huberella, Laeviheterohelix, Planoheterohelix, Protoheterohelix, Pseudoguembelina, Pseudotextularia ⟩⟨ Planoglobulina, Ventilabrella, Gublerina, Praegublerina, Sigalia, Racemiguembelina ⟩⟨ Lunatriella, Rectoguembelina, Zeauvigerina
Daughter taxa (time control age-window is: 0-800Ma)
Sigalia carpatica

Sigalia decoratissima

Sigalia deflaensis

Sigalia rugocostata

Sigalia sp.
Specimens which cannot be assigned to established species


Citation: Sigalia Reiss 1957
taxonomic rank: Genus
Type species: Guembelina deflaensis Sigal, 1952
Taxonomic discussion: The specimen shown in the top two figures of fig. 41 of Sigal (1952, *2917) was designated as the lectotype of Sigalia deflaensis (Sigal) by Salaj and Samuel (1963, *2715, p. 100), who restricted the genus as entirely biserial. However, both Reiss (1957, *2555) and Dowsett (1984, *1004, p. 133) noted that occasional chamber proliferation might occur and regarded the raised and beaded sutures as most characteristic of the genus.

Original description: Test compressed, biserial, rarely tending to add more than one chamber per series (row) in very late stages; wall structure calcareous, perforate; sutures limbate, covered by prominent rows of raised beads, giving the apertural end of each chamber a 'truncated' character; aperture arched, half-moon-shaped, in basal position at the inner margin of the chamber ('guembelinid'). Family Guembelinidae.

Entries in the Catalog of original descriptions: Sigalia

Distinguishing features:
Parent taxon (Heterohelicidae): Aperture symmetrical, ranging from a low slit to a high arch at the base of the final chamber, becoming terminal in uniserial taxa.
This taxon: Biserial or with chamber proliferation. Sutures rasied and beaded.

Test subtriangular in outline, compressed, biserial throughout, sutures moderately inflated but not globular, terminal face appearing truncate because of the elevated and beaded sutures; wall calcareous, surface with low and discontinuous ribs and distinctly perforate between the raised and strongly beaded sutures; aperture an arch at the base of the final chamber.

Geological Range:
Last occurrence (top): at top of D. asymetrica zone (100% up, 83.7Ma, in Santonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within D. concavata zone (85.60-89.75Ma, base in Turonian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:


Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs

Reiss, Z. (1957a). Notes on foraminifera from Israel. 1. Remarks on Truncorotalia aragonesis caucasica (Glaessner). 2. Loxostomoides, a new late Cretaceous and early Tertiary genus of foraminifera. 3. Sigalia, a new genus of foraminifera. Bulletin Research Council of Israel (Reprinted In Israel Geological Survey Bulletin). 6B: 239-244. gs


Sigalia compiled by the pforams@mikrotax project team viewed: 19-4-2024

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