CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina almadenensis Cushman and 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.


Higher levels: pf_cat -> G -> Globigerina -> Globigerina almadenensis
Other pages this level: Globigerina (Globigerinella), G. achtschacujmensis, G. adriatica, G. aequabilis, G. aequatorialis, G. aequilateralis, G. aequilateralis involuta, G. affinis, G. alanwoodi, G. almadenensis, G. alpigena, G. altispira, G. ampliapertura, G. ampliapertura cancellata, G. anconitana, G. angipora, G. angiporoides, G. angiporoides minima, G. angulata, G. anguliofficinalis, G. antarctica, G. antillensis, G. apertura, G. applanata, G. aptica> >>

Globigerina almadenensis

Citation: Globigerina almadenensis Cushman and Todd 1948
Rank: Species
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 age (chronostrat): Cretaceous? [probably Albian]
Type specimens: Pl. 16, figs. 18, 19. Cushman Coll. No 58502
Type repository: Washington; USNM

Linked specimens: USNM-58502 USNM-370076 USNM-58503 USNM-58504

Current identification/main database link: Muricohedbergella almadenensis (Cushman and Todd, 1948)


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 V O

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Globigerina almadenensis compiled by the pforams@mikrotax project team viewed: 2-3-2021

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