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Current identification/main database link: Planohedbergella ultramicra (Subbotina, 1949)
Original Description
Size:
Extra details from original publication
Because of the peculiar combination of such morphological features as the small size of the test, rounded outline, relatively large number and almost uniform size of the chambers of the final whorl, as well as the straight sutures, Globigerinella ultramicra is distinctly different from all other known species of this genus. Globigerinella aspera (Ehrenberg) [Phanerostomum asperum, 1854] which is stratigraphically the most closely related species, differs from our species in the larger size, the oval outline of the test, the considerably greater difference in the size of the chambers of the final whorl, and the distinctly spinous wall.
Subbotina, N. N. (1949). Микрофауна меловых отложений южного склона Кавказа [Microfauna from the Cretaceous of the southern slope of the Caucasus]. Trudy VNIGRI Mikrofauna USSR. 34: 5-36. gsReferences:

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Globigerinella ultramicra compiled by the pforams@mikrotax project team viewed: 19-11-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=130777 Go to Archive.is to create a permanent copy of this page - citation notes |
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Comments (3)
Original name: Globigerinella ultramicra (genus is feminine)
According to Ellis and Messina the correct ref. is: original description Subbotina, N. N. (1949). Микрофауна меловых отложений южного склона Кавказа - Microfauna from the Cretaceous of the southern slope of the Caucasus. VNIGRI, Microfauna of the oil fields of the USSR. 2(34): 5-36.
page(s): p. 33 pl. 2 fig. 17-18
thanks for those - and ending corrected now