Catalog - Globigerinella escheri clavata Catalog - Globigerinella escheri clavata

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinella escheri clavata Bronnimann 1952

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 -> Globigerinella -> Globigerinella escheri clavata
Other pages this level: G. aberranta, G. aissana, G. alexi, G. biforaminata, G. cushmani, G. duboisi, G. escheri clavata, G. evoluta, G. evoluta evoluta, G. gottisi, G. japonica, G. liverovskae, G. megaperta, G. messinae messinae, G. messinae subcarinata, G. naguewichiensis, G. praemicra, G. pseudovoluta, G. roeglina, G. subangulata, G. tururensis, G. ultramicra, G. voluta pinguis

Globigerinella escheri clavata

Citation: Globigerinella escheri clavata Bronnimann 1952
Taxonomic rank: sub-species
Type specimens: 689593 Holotype:T.L.L.Cat.No.167518.Text fig.24e,f.All appr.X 80. Plate 1, figs.12,13.
Type sample (& lithostrat): subsurface samples from the Morne Diablo area or the San Fernando area,
Type age (chronostrat): Turonian-Senonian, lower part of the Globotruncana lapparenti s.l. zone
Type locality: subsurface samples from the Morne Diablo area or the San Fernando area, southern Trinidad, B.W.I.
Type repository: Washington; USNM

Linked specimens: USNM-689593

Current identification/main database link: Clavihedbergella amabilis (Loeblich&Tappan, 1961)


Original Description

The test is similar to that of Globigerinella escheri escheri, except that the end chamber, occasionally also the penultimate one, is distinctly prolonged in radial direction, thus producing in lateral view a broad ellipsoid, non-tapering outline.

Size:
The maximum diameter of the paratypes is from 0.225mm.to 0.275mm.
Holotype:Maximum diameter 0.238mm.End chamber: radial diameter 0.11mmmm.;tangential diameter 0,1mm.;thickness 0.075mm. Thickness of first chamber of last volution 0.050mm.

Extra details from original publication
Remarks. The subspecies differs from the central type by the prolongation of the end chamber and by the non-tapering outline in lateral view. Globigerina subdigitata (Carman,1929,p.315,pi.34,fig.5,non fig.4),from the Niobrara formation of Wyoming displays affinities to the subspecies clavata. The Trinidad specimens, however, have radially and not obliquely arranged chambers.
OccurrenceGlobotruncana lapparenti, s.l. zone. Scarce.

References:

Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs


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Globigerinella escheri clavata compiled by the pforams@mikrotax project team viewed: 19-11-2025

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Comments (3)

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The holotype of Globigerinella escheri clavata Bronnimann is clearly and obviously low trochospiral. All images of Georgescu and Huber (2008) of "Globigerinelloides clavatus" used in this site are planispiral. It seems that we are dealing two different genera, let alone the same species.

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I agree it is clearly trochospiral, and I think the holotype of escheri clavata should be reassigned to Clavihedbergella amabilis. Planispiral specimens assigned to clavatus in the Georgescu & Huber 2008 paper should be reassigned to mendezensis. I am working on revision of Late Cretaceous species assigned to Globigerinelloides and have included those revisions in that manuscript.

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Following your comments and those of Changjie I am now removing the Globigerinoides clavatus page, reassigning the specimens to Globigerinelloides mendezensis and treating Globigerinella escheri clavata as a junior synonym of C. amabilis.

I hope that looks right

Jeremy