Praeglobotruncana

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:

• 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
• Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Hedbergellidae

Praeglobotruncana compiled by the pforams@mikrotax project team viewed: 16-10-2024 Taxon Search: Advanced Search 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