Catalog - Favusella orbiculata Catalog - Favusella orbiculata

CATALOG OF ORIGINAL DESCRIPTIONS: Favusella orbiculata Michael 1973

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.


Higher levels: pf_cat -> F -> Favusella -> Favusella orbiculata
Other pages this level: F. confusa, F. hedbergellaeformis, F. nitida, F. orbiculata, F. papagayosensis, F. pessagnoi, F. planata, F. quadrata, F. scitula, F. stiftia, F. voloshinae, F. wenoensis

Favusella orbiculata

Citation: Favusella orbiculata Michael 1973
taxonomic rank: Species
Type specimens: Plate 4, figs. 1-3; Holotype: USNM 172795; Paratype: USNM 172796; Paratype: F.M. 8; Pessagno Collection, University of Texas at Dallas.
Type locality: Holotype and paratypes from locality Tcx 10 Cook County (sample Wn. 2); Weno Forma- tion.
Type repository: Washington; USNM

Linked specimens: USNM-172796 USNM-172795

Current identification/main database link: Favusella washitensis (Carsey, 1926)


Original Description

Test small, round and circular, a low trochospire having two volutions of five globular chambers per whorl that increase gradually in size; narrow flanges in last three chambers; umbilicus wide and deep; sutures radial, depressed, those of earlier whorl almost obscured by the coarse ornamentation; primary aperture interiomarginal, umbilical-extraumbilical; very coarse polygonal ornamentation composed of relatively thick and high hexagonal ridges.

Etymology:
from Orbicu- latus-a-urn (Latin) = round or circular.

Extra details from original publication
Remarks. Favusella orbiculuta, n. sp., is characterizcd by its rounded circular test, its coarse polygonal ornamentation; its narrow flangcs developed by the last 3 or 2 chambers, and its deep umbilicus. This species is distinguished from Hedbergella hiltermanni Loeblich and Tappan, by its cameral flanges umbilically, by its regular polygonal ornamentation composed of relatively thick, high, hexagonal ridgcs; by being lower spired; by having less chambers per whorl; and by being subspherical.
Range: Upper Albian, Hedbergella implicata Subzone of the F . washitensis Assemblage Zone.
Occurrence: F. orbiculata is abundant in the Weno Formation and common in the Pawpaw and Denton Formations of North Central Texas.

References:

Michael, F. Y. (1973). Planktonic foraminifera from the Comanchean Series (Cretaceous) of Texas. Journal of Foraminiferal Research. 2 (1972)(4): 200-220. gs


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Favusella orbiculata compiled by the pforams@mikrotax project team viewed: 26-5-2024

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