Catalog - Favusella confusa Catalog - Favusella confusa

CATALOG OF ORIGINAL DESCRIPTIONS: Favusella confusa Longoria&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 -> F -> Favusella -> Favusella confusa
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 confusa

Citation: Favusella confusa Longoria&Gamper 1977
taxonomic rank: Species
Type specimens: Pl. 3, Figs. 4-6, 10-12; Pl. 4, Figs. 25-27
Type sample (& lithostrat): 45
Type age (chronostrat): Ticinella breggiensis zone, Albian
Type locality: Sabinas Basin, Northern Mexico

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

Original Description

Test of medium size, low trochospire, formed by two or three whorls; peripheral margin elongate, strongly lobate; generally four chambers in the last whorl, first chambers increasing gradually in size as added; ultimate chamber considerably larger, comprising about one half of the total diameter of the test, crescent-shaped on both spiral and umbilical sides; primary aperture umbilical in position; surface cancellate; umbilicus narrow and shallow.

Extra details from original publication
Variation of the species. Favusella confusa n. sp. is abundant in the material studied, and more than 100 specimens were observed. This species displays little morphologic varia­tion. The test shows a low trochospire and the last chambers always comprise one half of the total diameter of the test.

Remarks. Favusella confusa was confused with Favusella washitensis by Plummer (1931, pI. 31, figs. 12a-b). However, the study of topotypic material and close comparison with the type figure by D. O. Carsey (1926) allowed the senior author to clarify the taxonomic status of both species. Favusella con­fusa basically differs from F. washitensis by its ultimate cham­ber which comprises one half of the total diameter of the test. This characteristic basically separates Favusella confusa from other species of Favusella.

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

Occurrence. Favusella confusa has been reported from the Grayson Formation of Texas (USA) by Plummer (1931) as Globigerina washitensis Carsey and by Longoria (1974) from the same locality as Favusella sp.


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


Favusella confusa compiled by the pforams@mikrotax project team viewed: 20-5-2024

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