Catalog - Globuligerina bathoniana gigantea

CATALOG OF ORIGINAL DESCRIPTIONS: Globuligerina subsp. bathoniana gigantea Wernli & Gorog 1999

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.


Higher levels: pf_cat -> G -> Globuligerina -> Globuligerina bathoniana gigantea
Other pages this level: G. altissapertura, G. bathoniana australiana, G. bathoniana gigantea, G. calloviensis, G. caucasica, G. frequens, G. glinskikhae, G. gulekhensis, G. hungarica, G. meganomica, G. neilii, G. parva, G. parva Kuznetsova, G. stellapolaris, G. tojeiraensis, G. umbilicata, G. waskowskae

Globuligerina bathoniana gigantea

Citation: Globuligerina subsp. bathoniana gigantea Wernli & Gorog 1999
Rank: sub-species
Type specimens: Plate 1, Figs. 15-23.
Type sample (& lithostrat): level 6 - Dachsteinkalk
Type age (chronostrat): Bajocian
Type locality: Som Hill, Bakonybel, Hungary
Type repository: Geneva; Museum of Natural History

Current identification:


Original Description

The tests are of large size for a protoglobigerinid since they are comprised between 280 and 320 µm, instead of 120-185 µm for typical individuals of Poland (Pazdrowa, 1969, p. 45, and fig. 12). They are coiled in high trochospire on 3-4 whorls, with 4-5 (?) chambers in the first whorl and 3 in the last one. So the test appears approximately triserial in the adult stage. During the ontogenesis the increasing rate of size of the chambers is rather variable, giving shells either regularly conical (Pl. I, Fig. 17), or conical and after more or less cylindrical in shape. In the last case the trochospire changes to a rather helicoidal coiling because the cham- bers size slowly increases (Pl. I, Figs 15, 18, 19). The chambers are fully globular, in compact assemblage, with slightly depressed sutures. The umbilical side is well trilobated with a moderately deep umbilicus well highlighted by 3 sutures forming an Y shape. The aperture umbilically positioned is relatively large in arch hig- her than wide, asymmetrical and characteristic of Globuligerina. A small bulla (Plate I, Fig. 20) or its imprint (Pl. I, Fig. 17) can often be seen. Some of these bullae have a smaller infralaminal aperture. Generally the wall is recrystallized in calcite giving a finely rugose surface as the primary ornamentation being destroyed. In rare cases (Plate I, Fig. 21) one can observe pseudomuricae which sometimes fuse to discontinuous ridges. Small pores are distributed at random.

Size:
280 - 320 µm

Etymology:
giant.

Extra details from original publication
Our record at Som Hill comprises numerous shells with the general morphology of G. bathoniana but giant in size, two times larger than the holotypus. In the lack of good phyletic hypothesis about Bajocian species we prefer for the moment to describe this new taxon at the subspecific level.

Editors' Notes

References:

Wernli, R. & Gorog, A. (1999). Protoglobigerinids (foraminifera) acid extracted from Bajocian limestones (Hungary). Revista Española de Micropaleontología. 31(3): 419-426. gs V O


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Globuligerina bathoniana gigantea compiled by the pforams@mikrotax project team viewed: 3-12-2022

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