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Current identification:
Original Description
Extra details from original publication
Helvetiellids are considered as a specialized stock of planktonic foraminifera. lt is possible that they represent a migration of warm-water species to cool-water realms in Maastrichtian time (this conclusion is supported by their abundance in higher latitude faunas). Consequently, helvetiellids may represent an important component of the high latitude faunas that can be used as paleobiogeographic indicators connecting both low and higher latitude faunal realms.
The helvetiellids may be significant in understanding the migration of Tethyan faunas to the northern and southern latitudes. At the same time, their migration pattern would be indicative of paleo-oceanographic currents such as those that Berggren (1962) proposed to explain the invasion of Tethyan faunas in higher latitudes during Maastrichtian time.
Finally, helvetiellids may prove to be useful for correlating Maastrichtian strata of different paleogeographic provinces.
Range: Maastrichtian.
Occurrence: World·wide.
Longoria, J. F. & Gamper, M. A. (1984). Subfamily Helvetiellinae, a new group of Late Cretaceous (Maastrichtian) planktonic foraminifera. Micropaleontology. 30: 171-179. gsReferences:
Helvetiellinae compiled by the pforams@mikrotax project team viewed: 13-10-2024
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