Daughter taxa (time control age-window is: 0-800Ma) | ||||
Praeglobotruncana algeriana | ||||
Praeglobotruncana clotensis | ||||
Praeglobotruncana compressa | ||||
Praeglobotruncana delrioensis | ||||
Praeglobotruncana gibba | ||||
Praeglobotruncana gungardensis | ||||
Praeglobotruncana hilalensis | ||||
Praeglobotruncana inermis | ||||
Praeglobotruncana kalaati | ||||
Praeglobotruncana oraviensis | ||||
Praeglobotruncana plenusiensis | ||||
Praeglobotruncana pseudoalgeriana | ||||
Praeglobotruncana stephani | ||||
Praeglobotruncana sp. Specimens which cannot be assigned to established species |
Taxonomy
Original description: Concha trocoide, comprimida, biconvexa; horde periferico simple y aguda, camaras numerosas, aumentando gradualmente de tamafio segun se forman, todas visibles por el lado dorsal en varias vueltas de espira, solo visibles par el lado ventrallas de la ultima vuelta; suturas dorsales limbadas, ventrales hundidas; pared calcarea, perforada; umbilicada; abertura como una ranura sencilla en la base de la cara septal de la ultima camara. Dimension 0.3 mm.
Entries in the Catalog of original descriptions: Praeglobotruncana
Distinguishing features:
Parent taxon (Hedbergellidae): Test trochospirally coiled, primary aperture interiomarginal, extraumbilical-umbilical, with prominent apertural lip, apertures of earlier chambers remain visible around the umbilical region; no sutural secondary apertures.
This taxon: Test trochospiral, biconvex to spiroconvex, umbilicate, periphery subangular with prominent nonporous carinal band that may have numerous pustules in the earlier part of the last whorl but is less distinct on the final chamber, sutures curved on the spiral side, radial on the umbilical side, flush to slightly depressed; wall calcareous, finely and densely perforate, radial in structure, surface smooth to pustulose or nodose, most rugose on the early chambers and keel; aperture an interiomarginal, extraumbilical-umbilical arch that extends to the periphery, bordered by an imperforate lip or flap.
Geological Range:
Last occurrence (top): at top of D. concavata zone (100% up, 85.6Ma, in Santonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within P. appenninica zone (100.50-101.92Ma, base in Albian 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. gsReferences:
Praeglobotruncana compiled by the pforams@mikrotax project team viewed: 14-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110425 Go to Archive.is to create a permanent copy of this page - citation notes |
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