Catalog - Globigerina cyclostoma

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina cyclostoma Galloway & Wissler 1927

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 cyclostoma
Other pages this level: << < G. conglomerata Terquem, G. conglomerata paula, G. conica, G. contorta, G. corpulenta, G. crassa, G. crassaformis, G. cretacea, G. cretacea delrioensis, G. cretacea eggeri, G. cretacea esnehensis, G. cretacea saratogaensis, G. cristata, G. cristatiformis, G. cryophila, G. cyclostoma, G. danica, G. danvillensis, G. daubjergensis, G. decepta, G. depressa, G. depressa d’Orbigny, G. detrita, G. difformis, G. digitata, G. dinodensis, G. diplostoma, G. dissimilis, G. druryi, G. druryi decoraperta, G. dubia> >>

Globigerina cyclostoma

Citation: Globigerina cyclostoma Galloway & Wissler 1927
Rank: species
Type locality: Lomita Quarry, Palos Verdes Hills, California
Type age (chronostrat): Pleistocene
Type sample (& lithostrat): lower bed at the D. M. S. & B. Quarry; Lower San Pedro Fm.
Type specimens: Plate 7, figs. 8, 9
Type repository: Columbia University Paleo. Coll. No. 19818

Linked specimens: USNM-454924 USNM-454923

Current identification/main database link: Globigerinoides ruber (d’Orbigny, 1839)


Original Description
Test subglobular, composed of about seven or eight rapidly and regularly enlarging, closely appressed chambers, three of which compose the final volution, the last chamber being somewhat flattened on top and composing slightly less than one-half of the test; wall coarsely reticulate, the angles between having spines or knobs which almost obscure the pores; sutures depressed, inconspicuous; aperture a circular opening at the center of the inner margin of the last chamber, with a slight lip and with several small rounded secondary apertures between the chambers at the top of the spire.

Size: Length of the type specimen, 0.39 mm.; width 0.35mm.

Extra details from original publication
Occurrence. Rare in all three beds at the D. M. S. & B. Quarry. Not present in the Timms Point Pliocene material examined. Present in a few well samples from the Saugus and the Upper and Lower Pico of the Los Angeles Basin.
This species differs from G. rubra d'Orbigny (in De la Sagra, Hist. Ph Nat. Cuba, 1839, Foraminiferes, p. 94, pl. 4, figs. 12-14), by its much more compact method of coiling, its less globular chambers, its more regularly formed trochoid coil and its small, circular aperture. Figure 9 shows a specimen from the middle bed in which the secondary apertures are obscure.

References:

Galloway, J. J. & Wissler, S. G. (1927). Pleistocene foraminifera from the Lomita Quarry, Palos Verdes Hills, California. Journal of Paleontology. 1(1): 35-87. gs


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Globigerina cyclostoma compiled by the pforams@mikrotax project team viewed: 19-9-2021

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