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.
Current identification:
Description.– Test biserial throughout (Pl. 2, Fig. 7, Pl. 3, Figs 1, 2, 5, 6, 8, 10, Pl. 4, Figs 7, 8) or, occasionally, with a very short early triserial stage (Pl. 3, Fig. 12, Pl. 4, Fig. 1).
Original Description
The test is twisted along the axis of growth at least in the earlier part. Proloculus is large, its maximum dimension ranging between 28 and 44 µm. Chambers are globular to subglobular, with little overlapping and slow and gradual increase in size. Aperture is elliptical and subterminal in position; it is bordered by an asymmetrical imperforate rim (Pl. 2, Fig. 8, Pl. 4, Figs 1, 2, 3, 6, 7) and provided with a toothplate. A supplementary suture is present on the apertural face of the last-formed chamber and it extends from the aperture base to the suture between the last-formed two chambers (Pl. 3, Fig. 2, Pl. 4, Figs 1-4, 6,7). Chamber surface is smooth. Test wall is calcitic, hyaline, nannoperforate; pores are elongate to circular in shape, their size ranging between 0.2 and 0.5 µm.
Size:
Etymology:
Extra details from original publication
Remarks.– Praeplanctonia globifera differs from P. quasiplanctonica nov. sp. by having larger proloculus and lower rate of increase in chamber size during the ontogenetic development.
Diagnosis.– Species of Praeplanctonia with large proloculus and globular chambers, which increase slowly in size.
Georgescu, M. D. (2009a). On the origins of Superfamily Heterohelicacea Cushman, 1927 and the polyphyletic nature of planktic foraminifera. Revista Española de Micropaleontología. 41: 107-144. gs References:

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Praeplanctonia globifera compiled by the pforams@mikrotax project team viewed: 13-9-2026
Short stable page link: https://mikrotax.org/pforams/index.php?id=132498 Go to Archive.is to create a permanent copy of this page - citation notes |
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