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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.
holotype-245.jpg
paratype-245~a.jpg
paratype-245~b.jpg
paratype-245~c.jpg
paratype-245~d.jpgLinked specimens: USNM-689011
Current identification/main database link: Rugotruncana circumnodifer (Finlay, 1940)
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"
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. gsReferences:
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Globigerina circumnodifer compiled by the pforams@mikrotax project team viewed: 23-1-2021
Short stable page link: http://mikrotax.org/pforams/index.php?id=130405 Go to Archive.is to create a permanent copy of this page - citation notes |