CATALOG OF ORIGINAL DESCRIPTIONS: Ticinella petalloidea Longoria and Gamper 1977

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 -> T -> Ticinella -> Ticinella petalloidea
Other pages this level: T. albiana, T. aprica, T. bejaouaensis transitoria, T. caronae, T. floresae, T. madecassiana, T. moulladei, T. petalloidea, T. praeticinensis, T. primula, T. raynaudi, T. raynaudi aperta, T. raynaudi digitalis, T. raynaudi raynaudi, T. roberti bejaouaensis, T. roberti eubejaouaensis, T. subbreggiensis,

Ticinella petalloidea

Citation: Ticinella petalloidea Longoria and Gamper 1977
Rank: Species
Type locality: Sabinas Basin, Northern Mexico
Type age: Ticinella breggiensis zone, Albian
Type sample and level: 41
Holotype Repository: USNM;
Type & figured specimens: P1. 2, Figs. 13-15: Unfigured paratypes will be Longoria Collection of the Instituto de Geologia, UNAM.

Current identification/main database link: Ticinella primula Luterbacher, in Renz et al., 1963


Original Description
Test of medium size, low trochospire; peripheral margin subcircular, lobate; six to seven chambers in the last whorl, increasing gradually in size as added, early chambers petalloid; later chambers crescent-shaped on spiral side; early chambers subtriangular; later chambers crescent-shaped on umbilical side; sutures strongly depressed and straight on both spiral and umbilical sides; primary aperture extraumbilical-spiroumbilical in position; umbilical area wide and shallow.

Etymology: This species derives its name from the petalloid-shape of the chambers of the last whorl.

Extra details from original publication
Variation of the species. Ticinella petalloidea n. sp. is abundant in the material studied, and more than 90 specimens were analyzed. It shows little morphologic variation. The height of the spire is constant; all the specimens observed have low trochospiral coil. Individuals with seven chambers in the last whorl are rarely observed.

Remarks. Ticinella petalloidea n. sp. differs from T. primulla Luterbacher by its crescent-shaped chambers and by its subcircular instead of elliptical peripheral outline.

 Range. Upper Ticinella breggiensis Zone (upper Albian) to lower Thalmanninella evoluta Zone (lower Cenomanian).

References:

Longoria, J. F. & Gamper, M. A. (1977). Albian planktoinc foraminifera from the Sabinas Basin of northern Mexico. Journal of Foraminiferal Research. 7(3): 190-215. gs


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Ticinella petalloidea compiled by the pforams@mikrotax project team viewed: 2-4-2020

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