CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina almadenensis Cushman&Todd 1948
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.
Citation: Globigerina almadenensis Cushman&Todd 1948Taxonomic rank: speciesType specimens: Pl. 16, figs. 18, 19. Cushman Coll. No 58502Type age (chronostrat): Cretaceous? [probably Albian]Type locality: A road cut in a small stream valley about 0.23 mi. from the Shannon Road junction on a small secondary road which trends southwesterly from Shannon Road at a point 0.7 mi. west of Guadalupe Creek, in the southwest quarter of sec. 24, T. 8 S., R. 1 W., Mt. Diablo meridian, New Almaden district, Santa Clara Co., California.Type repository: Washington; USNM
Original Description Test trochoid, compressed, composed of 2 to 2½ whorls, spire low, umbilicus large, open; chambers distinct, seven in the adult whorl, very little increasing in size as added in the adult; sutures distinct, depressed, radial; wall rough, probably due to the original spinosity of the surface; aperture opening into the umbilicus. Extra details from original publication This species differs from G. cretacea d'Orbigny in having seven instead of five chambers in the adult whorl and in the more open umbilicus. It somewhat resembles G. planispira Tappan from the Lower Cretaceous of Texas but is twice as large and the chambers are less spherical in shape and so the periphery is less lobulated. It occurs very abundantly. Editors' Notes The type material is probably Albian in age [comment from Chronos website]
References:
Cushman, J. A. & Todd, R. (1948). A foraminiferal fauna from the New Almaden district, California. Contributions from the Cushman Laboratory for Foraminiferal Research. 24: 90-98. gs
Globigerina almadenensis compiled by the pforams@mikrotax project teamviewed: 16-11-2025
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