CATALOG OF ORIGINAL DESCRIPTIONS: Pseudoguembelina costellifera Masters 1976
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.
Citation: Pseudoguembelina costellifera Masters 1976Rank: SpeciesType specimens: 184726Type age (chronostrat): MaastrichtianType locality: from 11.6 feet above the contact of the Prairie Bluff Chalk with the underlying Ripley Formation [which in turn overlies the Demopolis Chalk], 15.1 feet above river level at mile 159.1 of the Alabama River on its south bank, Wilcox County.Type repository: Washington; USNM
Original Description "Test biserial, laterally compressed, gradually expanding from initial end. Chambers 14-15 in number, slightly inflated, with tendency toward reniform shape in gerontic stage, earlier chambers wider than broad. Wall very finely perforate. Pores in single rows between costae. Surface finely and abundantly costate. Primary aperture narrow, moderatly arched. Accessory apertures on tubelike chamber extensions in interiosutural position of ephebic stage. Sutures of juvenile stage straight, normal to edge, but convex toward the aperture in adult." Size: Etymology: Extra details from original publication
Editors' Notes
References:
Masters, B. A. (1976). Planktonic foraminifera from the Upper Cretaceous Selma group, Alabama. Journal of Paleontology. 50(2): 318-330. gs
Pseudoguembelina costellifera compiled by the pforams@mikrotax project teamviewed: 30-11-2022
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