pforams@mikrotax - Kuglerina

nmn

Kuglerina

Classification: pf_mesozoic -> Rugoglobigerinidae -> Kuglerina
Sister taxa: Archaeoglobigerina, Bucherina, Kuglerina, Plummerita, Rugoglobigerina, Rugotruncana, Trinitella,

Daughter taxa: (blue => in age window 0-800Ma)
			Kuglerina rotundata
			Kuglerina sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Kuglerina Brönnimann and Brown 1956

Rank: Genus

Type species: Rugoglobigerina rugosa subsp. rotundata Brönnimann, 1952

Taxonomic discussion: Helvetiella was described as differing from Rugoglobigerina in lacking a meridional alignment of rugosities and from Archaeoglobigerina in lacking an imperforate carinal band (although none is present in the type species of either) and in the heavily ornamented surface. However, it appears very similar to Kuglerina and is here regarded as synonymous.

Original description: The calcareous hyaline test is initially coiled in a low trochospiral, later becoming a high trochospiral with an accompanying shift in the axis of coiling. The early chambers are globular, inflated, and globigerine-like. Later chambers are axially (vertically) elongated and are broadly rounded. The early chambers are smooth to irregularly hispid. Later chambers exhibit fine costellae or traces of costellae arranged in a meridional pattern. The aperture is rounded, interiomarginal, and opens into a relatively small but deep umbilicus. Short apertural flaps extend into the umbilicus but do not form a cover-plate.

Entries in the Catalog of original descriptions: Kuglerina

Distinguishing features: Test relatively large, up to 0.5 mm in diameter, with moderately high trochospiral coil, chambers globular to somewhat elongate as seen in edge view, enlarging gradually, four to six in the final whorl, sutures radial, depressed, umbilicus about one-fourth the test diameter, periphery rounded, noncarinate, peripheral outline lobulate; wall calcareous, perforate, surface with prominent pustules and rugosities but without regularly aligned costellae; primary aperture umbilical, provided with tegilla and with both proximal and distal accessory apertures.

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Campanian Stage (72.05-83.64Ma, base in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

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

References:

Brönnimann, P. & Brown, N. K. (1956). Taxonomy of the Globotruncanidae. Eclogae Geologicae Helvetiae. 48: 503-562. gs :: ::

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