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.
Linked specimens: USNM-4856
Current identification/main database link: Trinitella scotti Bronnimann 1952
Original Description
The umbilicus is large, deep, subcircular and probably provided with a delicate covering plate. Only fragments of this plate are preserved along the border of the umbilicus. The chambers are truncate toward the apertural side and increase in size as added. Seen from the spiral side, each adult chamber overlaps the next one. The sutures on the spiral side, therefore, are strongly curved in the direction of coiling. Those on the umbilical side are deep and relatively straight to slightly curved backward.
The arcuate apertures open into the umbilicus. The walls seem to be thick, and the surface, especially of the inner chambers, is strongly rugose. The ornamentation appears to be of the meridional pattern, although no central point was noted on the surface of the end chamber.
The counted individuals are invariably dextrally coiling.
Size:
The longer diameter of the paratypes measures from 0.27mm.to 0.425mm.
Etymology:
Extra details from original publication
groups of Rugoglobigerina.
Occurrence: Globotruncana mayaroensis zone. Frequent. Possibly also Globotruncana gansseri zone.
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 Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gsReferences:
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Trinitella scotti compiled by the pforams@mikrotax project team viewed: 31-1-2023
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