CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia greenhornensis Morrow 1934
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Citation: Globorotalia greenhornensis Morrow 1934Taxonomic rank: speciesType specimens: Plate 31, figures 1a-c; 75378Type age (chronostrat): CenomanianType locality: Sec. 31, T. 218., R. 22N., Hodgeman County, Kansas, U. S. A.Type repository: Washington; USNM
Original Description Test trochoid, biconvex, dorsal side distinctly convex, ventral side strongly convex; periphery slightly scalloped, chambers numerous, eight or nine in final whorl, dorsal side flattened, bordered by a thickened, slightly elevated margin which curves forward from the edge of the preceding chamber to the spiral suture, chambers seen from the ventral side inflated, extended in the direction of the axis of coiling producing a deep steepsided umbilical area; sutures on the ventral side strongly depressed, curving gently backward; periphery acute, wall finely perforate; aperture umbilical at base of last chamber. Size: Diameter, 0.66 mm., thickness, 0.22mm. Extra details from original publication The characters of G. greenhornensis are distinctive and quite constant, making it very easy to distinguish from other species with which it is associated. This species is very abundant locally and apparently restricted to the Greenhorn formation.
References:
Morrow, A. L. (1934). Foraminifera and ostracoda from the Upper Cretaceous of Kansas. Journal of Paleontology. 8: 186-205. gs
Globorotalia greenhornensis compiled by the pforams@mikrotax project teamviewed: 21-5-2026
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