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.
|Hantkenina (Cribrohantkenina) bermudezi Thalmann 1942|
= Cribrohantkenina inflata
Current identification/main database link: Cribrohantkenina Thalmann, 1942
See also: Cribrohantkenina - also used as genus;
Geologic range: Upper Eocene (Ledian and Wemmelian); questionably also in lower Oligocene (Lattorfian).
In a personal communication (letter, dated April 2, 1942), Henry V. Howe stated, that by washing topotype material of Hantkenina inflata with his soap method details of the aperture were brought out which are not evident from the description of the holotype. He found that what he had taken to be a tripartite aperture in his holotype (Pl. 1, Fig. 7), is in fact an aperture with three distinct holes, one median, and two lateral. Topotype specimens sent to the writer confirmed Howe's discovery, and, therefore, H. inflata is placed into the subgenus Cribrohantkenina. With regard to the alleged Oligocene age of the holotype, Howe further states, that, when collecting the sample in 1924, he landed on the contact between the Vicksburg and the Jackson formation at the type locality. The basal Vicksburg beds apparently contain reworked Jackson fossils, a condition that "certainly prevails for at least ten feet above the base of the Red Bluff at its type locality," where the Foraminifera are distinctly of Vicksburg, the Bryozoa, however, clearly of reworked Jackson age.
With respect to Hantkenina mccordi Howe and Wallace, Henry Y. Howe, in his letter cited above, remarks that the edge of the aperture does not appear to be broken (see Howe and Wallace, 1932), "but I suspect that the animal was about to begin the secretion of the supplementary apertural plate similar to that possessed by H. danvillensis, and from the number of lobes it shows, I suspect that if it had been complete it should have had as many as seven or eight holes in it." H. mccordi Howe and Wallace, is, therefore, placed by the writer into the subgenus Cribrohantkenina.
Extra details from original publication
Hantkenina (Cribrohantkenina) compiled by the pforams@mikrotax project team viewed: 6-2-2023
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