Globigerina


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Related to Globigerina: globigerina ooze

Globigerina

 

a genus of protozoan animals of the order Foraminifera of the class Rhizopoda. The porous calcareous shell of Globigerina consists of several interconnected, spherical chambers. The surfaces of the chambers are covered with numerous long, radial needles, which facilitate floating in water. Globigerina, as distinguished from other rhizopods, is not benthonic but free swimming, and it is found in large numbers in plankton in warm seas. There are several tens of species, including many fossils. The shells of dead Globigerina fall to the bottom of the sea and form the principal constituent of deepwater oceanic globigerina ooze.

References in periodicals archive ?
The species differs from Globigerinoides tenellus and Globigerinoides ruber in having a more lobulate periphery and in the absence of supplementary apertures; and from other Globigerina species in having a coarsely perforate wall.
(ra), Epistomina umbonifera (ra), Fissurina marginata (ra), Globigerina praebulloides (ra), Globobulimina sp.
They are gray to green and contain benthic (miliolids, Nummulites, Neorotalia, Elphidium, Operculina, Amphistegina and textularids) and planktonic (Paragloborotalia mayeri and Globigerina spp.) foraminifera.
Also, the number of marine microorganisms in seafloor sediment--in particular, that of a species called Globigerina bulloides--indicates the upwelling of nutrient-rich waters, another measure of wind shear at the ocean's surface.
In cores 25-1 and 25-2 I have recognized Bolli's Quaternary Globorotalia crassaformis viola, Globorotalia crassaformis hessi, Globigerina calida calida, Globigerina bermudezi, and Globorotalia fimbriata Subzones (Bylinskaya et al., 2002).
Tanner (1835-1906) was making familiar entries of salps, foraminifera, globigerina, large red crabs, starfish, squid, "coral growth," barnacles, and lobsters, reflecting the growing interest of all in that portion of the harvest.
She has found that the isotopic composition of two species, Globigerina bulloides and Globigerinoides ruber, accurately records sea surface temperature changes in Guaymas Basin [ILLUSTRATION OMITTED].
The planktic foraminifera include genera of Globorotalia Globigerina andPlanorotalites and their abundance ranges from 10 to 20 % of the total allochems.