CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinella messinae messinae Bronnimann 1952
This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Original Description "The small and compressed test with its more or less lobate outline is semi-involute and planispiral in the adult, though occasionally developing a tendency toward a weak trochoidal spiral. The test throughout is closely coiled. The adult volution comprises five, rarely six, chambers. They are peripherally rounded and laterally somewhat compressed, and increase in size rapidly. The outline of the chambers is elongate-ellipsoid in apertural view and subcircular in umbilical view. The shallow umbilici are partly covered with the prolongations of the delicate lip-like projections of the apertural border. In the well-preserved individuals they exhibit portions of the early ontogenetic volutions. No details of shape and arrangement of the innermost chambers are recognizable. The straight sutures are deep and well marked. The large arcuate aperture issituated equatorially at the base of the end chamber. The aperture is surrounded with delicate lip-like projections extending into the umbilici. The walls appear to be thin and finely perforate. Minute papillae are evenly distributed over the surface. Early chambers are more strongly ornamented." Size: The maximum diameter of the paratypes ranges from 0.31mm.to 0.4mm.
Holotype: Maximum diameter 0.4mm.End chamber: radial diameter 0.2mm.;tangential diameter 0.2mm.;thickness 0.175 mm. Etymology: This subspecies is named after Miss A. Messina, co-author of the Catalogue of Foraminifera.
It differs from the related forms by the rounded periphery of the chambers. Extra details from original publication Remarks. This subspecies differs from the related forms by the rounded periphery of the chambers. From Globigerinella voluta (White),originally described from the Mendez shale and from the base of the Velasco shale,Tampico Embayment area, Mexico (White,M.P.,1928,pp.197-198,pi.28,figs.5a-b) it is distinguished by the much smaller size, the distinctly laterally compressed, finely ornamented chambers, and by the large arcuate aperture with liplike projection, which in Globigerinella voluta is "a thin lunate opening in the suture on the margin of the last chamber."
References:
Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs
Globigerinella messinae messinae compiled by the pforams@mikrotax project teamviewed: 19-11-2025
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