CATALOG OF ORIGINAL DESCRIPTIONS: Hastigerina eocenica Berggren 1960
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 Test free, early chambers slightly trochoid, adult planispiral, early portion involute, final whorl somewhat evolute but not uncoiling, biumbilicate, strongly symmetrical, periphery rounded, peripheral margin lobulate, outline oval to subcircular; chambers subspherical to ovate, inflated, particularly in the final chamber, 5-6 (occasionally 7) in the final whorl, 15-16 visible 2½ whorls extending into the narrowing umbilicus; sutures deeply depressed, radially curved on both sides of the test; wall calcareous, densely perforated by distinct small pores, surface otherwise smooth ad nglossy; aperture interiomarginal, a long low equatorial arch extending along the base of the septal margin of the final chamber and becoming quite high in peripheral view; thickened apertural lip usually present, occasionally with a sharp rim. Size: Dimensions in mm.- Holotype Paratype Paratype Maximum height in umbilical view 0.380 0.325 0.325 Maximum width in umbilical view 0.310 0.250 0.390 Maximum inflation of test in edge view 0.220 0.190 0.210 Diameter of aperture in peripheral view from point of opening to point of closure 0.100 - 0.130 Editors' Notes original combination not double checked
References:
Berggren, W. A. (1960). Some planktonic foraminifera from the Lower Eocene (Ypresian) of Denmark and northwestern Germany. Stockholm Contributions in Geology. 5: 41-108. gs
Hastigerina eocenica compiled by the pforams@mikrotax project teamviewed: 2-4-2023
holotype illus_892.jpg
holotype illus_892.jpg
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