Catalog - Globotruncana cachensis Catalog - Globotruncana cachensis

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana cachensis Douglas, in Douglas & Sliter 1966

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 -> Globotruncana -> Globotruncana cachensis
Other pages this level: << < G. ansarii, G. appenninica, G. arabica, G. araratica, G. arca caribica, G. arca esnehensis, G. arcaformis, G. aspera, G. asymetrica, G. atlantica, G. aturica, G. azerbaidjanica, G. bahijae, G. bollii, G. bulloides naussi, G. cachensis, G. calcarata, G. calcarata arcata, G. calcarata primitiva, G. calcarata retardata, G. caliciformis sarmientoi, G. caliciformis trinidadensis, G. campbelli, G. canaliculata ventricosa, G. carpathica, G. carteri, G. churchi, G. citae, G. coldreriensis, G. concavata cyrenaica, G. conica> >>

Globotruncana cachensis

Citation: Globotruncana cachensis Douglas, in Douglas & Sliter 1966
Taxonomic rank: species
Described on page(s) : 108
Type specimens: P1. 5, fig. 5
Type locality: alt Creek, Colusa Co. (UCLA loc. 5238), California
Type repository: UCMP Department of Geology, University of California, Los Angeles

Current identification:


Original Description

Test free, low to high trochospiral, spiro-convex, axial periphery ovate, marginal band with well developed keel on spiral edge in early chambers, later rounded, equatorial periphery lobate. Chambers globular, creasing gradually in size, 5 to 6 in final whorl. Sutures curved, limbate, beaded on early chambers of spiral side, later ones slightly depressed, umbilical sutures depressed, nearly straight, radial. Wall calcareous, radial in structure, perforate, sur-lace rugose, particularly the carinal band. later chambers usually smooth. Umbilicus deep and wide. Aperture interiomarginal, umbilical. Specimens examined are without preserved tegilla.

Size:
Greatest diameter of holotype 0.43 mm, thickness 0.24 mm.

Extra details from original publication
Remarks: Juvenile forms are similar to Praeglobotruncana helvetica (Bolli) but are readily distinguished from the latter by the spiroconvexity and ovate chambers in final whorl, which lose the distinct keel on the spiral edge of the margin. Axial thin-sections show a wide poreless margin in the early chambers which becomes narrower with age. Margins of the final chamber may be entirely porous. The stratigraphic range is from Middle Turonian to Coniacian.

Also recorded from the Dry Creek area, California (Marianos and Zingula, 1966, in press)

References:

Douglas, R. & Sliter, W. V. (1966).

RegionaI distribution of some Cretaceous Rotaliporidae and Globotruncanidae ( Foraminiferida) within North America.

. Tulane Studies in Geology. 4(3): 89-131. gs O

Marianos, A. W. & Zingula, R. P. (1966). Cretaceous planktonic foraminifers from Dry Creek, Tehama County, California. Journal of Paleontology. 40: 328-343. gs


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Globotruncana cachensis compiled by the pforams@mikrotax project team viewed: 5-9-2026

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