Plummerita

Daughter taxa (time control age-window is: 0-800Ma)
			Plummerita hantkeninoides
			Plummerita kennerleyi
			Plummerita reicheli
			Plummerita sp. Specimens which cannot be assigned to established species

Taxonomy

Original description: Test small, Hantkenina-like, almost planispiral to distinctly trochoidal, generally only last whorl visible. Chambers increasing in size as added, compressed in early portion of last volution, slightly to much inflated in the adult. Spines in axial position of the chambers, present throughout the last vi^horl or restricted to early chambers. Sutures straight, shallow, but clearly marked. Umbilicus developed in trochoidal species, probably with covering plate. Aperture unknown, in analogy to the related forms probably rounded and large, leading into the umbilicus. Wall thick and surface ornamented by minute spines and ridges, either irregularly distributed or arranged in rows radiating from a central point on the surface toward the apertural face (meridional pattern).

Entries in the Catalog of original descriptions: Rugoglobigerina (Plummerella), Plummerita

Distinguishing features:
Parent taxon (Rugoglobigerinidae): Test trochospiral, chambers inflated, periphery rounded, not carinate; wall with pustules, costellae, or other rugosities; aperture umbilical, with portici or tegilla.
This taxon: Test with inflated triangular chambers in a low to flat trochospire, those of the final whorl radially elongate and ending in a tubulospine, sutures radial, depressed, umbilicus small, periphery rounded to compressed between tubulospines, peripheral outline strongly lobate and stellate; wall calcareous, perforate, surface with rugosities and costellae in meridional alignment; primary aperture interiomarginal, umbilical, provided with tegilla, and having both proximal and distal accessory apertures.

Geological Range:
Last occurrence (top): at top of P. hantkeninoides zone (100% up, 66Ma, in Danian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within A. mayaroensis zone (67.64-69.27Ma, base in Maastrichtian 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: Rugoglobigerinidae

Plummerita compiled by the pforams@mikrotax project team viewed: 9-10-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110418 Go to Archive.is to create a permanent copy of this page - citation notes

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