CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina circumnodifer Finlay 1940
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.
Original Description "Large, loosely coiled, 4 chambers per coil, about 2 coils visible dorsally, ventrally nearly involute; spire flatly depressed, second coil more descending, chambers sub-globular, smooth, shining above and below but with faint peripheral sulcus margined by low nodules increasing in extent posteriorly to cover most of early chambers; umbilicus widely open, about one-third of shell diameter, aperture opening laterally into it, apertures of all ventral chambers probably visible if matrix absent. Size, 0.47 mm. Evidently a close relative of the abundant Navarro Globigerina rugosa Plummer, which has 5 chambers per coil and more ornament of a different character. It is a moot point whether these are not Globotruncana, as they differ only in the absence of keels and feebler sculpture"
References:
Finlay, H. J. (1940). New Zealand foraminifera: Key species in stratigraphy - no. 4. Transactions of the Royal Society of New Zealand. 69(4): 448-472. gs
Globigerina circumnodifer compiled by the pforams@mikrotax project teamviewed: 21-3-2023
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