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.
Current identification/main database link: Globigerinella siphonifera (d'Orbigny, 1839)
Original Description
[Brady, 1884, op. cit., p. 605]: "Test planospiral, compressed, bilaterally symmetrical, tvpically evolute; consisting of rather more than a single loosely-coiled convolution; segments usually about six in number, and all visible from either side of the shell, nearlv globular in shape, the last sometimes smaller than the penultimate; aperture an arched opening on the umbilical face of each segment. Diameter, 1/30 inch (0.84 mm.), more or less.
Size:
Etymology:
Extra details from original publication
"Globigerina aequilateralis occurs amongst the surface-microzoa from the North Atlantic and the North and South Pacific. It has also been found in the South Atlantic but only in bottom-dredgings. Its area of distribution appears to extend from off the southwest corner of Ireland, lat. 50° N., to the Cape of Good Hope, about lat. 35° S.
"There can be little doubt that one of the specimens figured by Egger (1857, Neues Jahrb. Min., etc., p. 296, pl. 11, fig. 4) under the name Cassidulina globulosa Egger belongs to the present species, so that its geological history dates back at least as far as the Miocene period. Ehrenberg gives a drawing of a very similar form, possibly the same (Phanerostomum asperum Ehrenberg, 1854, Mikrogeologie, pl. 30, fig. 26a-b) from the Chalk of the Island of Rugen."
Editors' Notes
Bolli, H. M., Loeblich, A. R. & Tappan, H. (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 3-50. gs V O Brady, H. B. (1879). Notes on some of the reticularian Rhizopoda of the "Challenger" expedition. I.- On new or little known arenaceous types. Quarterly Journal of Microscopical Science. 19: 20-63. gsReferences:
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Globigerina aequilateralis compiled by the pforams@mikrotax project team viewed: 29-1-2023
Short stable page link: https://mikrotax.org/pforams/index.php?id=130328 Go to Archive.is to create a permanent copy of this page - citation notes |
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