Catalog - Globorotalia archeomenardii Catalog - Globorotalia archeomenardii

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia archeomenardii Bolli 1957

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 -> G -> Globorotalia -> Globorotalia archeomenardii
Other pages this level: << < G. albeari, G. almadenensis, G. amuria, G. andalusiana, G. anfracta, G. angulata abundocamerata, G. angulata kubanensis, G. angulata praepentacamerata, G. apanthesma, G. apertura, G. aragonensis, G. aragonensis araratica, G. aragonensis caucasica, G. aragonensis incisimarginata, G. aragonensis twisselmanni, G. archeomenardii, G. armenica, G. australiformis, G. avanensis, G. barisanensis, G. bella, G. berggreni, G. bermudezi, G. berwaliana, G. birnageae, G. bollii, G. bonairensis, G. bononiensis, G. bouregregensis, G. broedermanni lodoensis, G. bullbrooki> >>

Globorotalia archeomenardii

Citation: Globorotalia archeomenardii Bolli 1957
Taxonomic rank: species
Type specimens: Holotype P5676
Type age (chronostrat): Globorotalia fohsi barisanensis zone
Type locality: Locality: Holotype (USNM P5676) from the type locality of the Globorotalia fohsi barisanensis zone, Trinidad, sample Bo 202 (TTOC 193125).
Type repository: Washington; USNM

Linked specimens: USNM-5676

Current identification/main database link: Globorotalia archeomenardii Bolli, 1957


Original Description

Shape of test low trochospiral, compressed; equatorial periphery slightly lobate; axial periphery acute with a thin but distinct keel. Wall calcareous, very finely perforate, surface smooth. Chambers angular rhomboid, strongly compressed; 12-15, arranged in about 3 whorls, the 4-5 chambers of the last whorl increase fairly rapidly in size. Sutures on spiral side strongly curved; on umbilical side radial to slightly curved, depressed. UmbUicus small, fairly shallow. Aperture a low slit; interiomarginal, umbilical-extraumbilical. Coiling random.

Size:
Largest diameter of holotype 0.3 mm.

Extra details from original publication
Stratigraphic range (in Cipero formation) : Upper part of the Globigerinatella insueta zone to the lower part of the Globorotalia fohsi fohsi zone.

Remarks: Globorotalia archeomenardii, new species, is distinguished from G. menardii (d'Orbigny) and G. praemenardii Cushman and Stainforth by having a more convex spiral side and in being less lobate. The range in size of the specimens of the new species is very small in contrast to that of the other two species. Typical G. archeomenardii disappear with the first appearance of G. praemenardii. It is probably the ancestor of the G. praemenardii-menardii suite.

References:

Bolli, H. M. (1957b). Bolli, H. M. (1957). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In, Loeblich, A. R. , Jr. , Tappan, H. , Beckmann, J. P. , Bolli, H. M. , Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 97-123. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 97-123. gs


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Globorotalia archeomenardii compiled by the pforams@mikrotax project team viewed: 17-6-2025

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