Taxonomy of Middle Miocene foraminifera from the northern Namibian continental shelf
Author
Bergh, Eugene W.
0000-0002-0765-4141
Marine Research Institute and Department of Geological Sciences, University of Cape Town, Private Bag X 3, Rondebosch, 7701, South Africa. & Department of Environmental and Geographical Sciences, University of Cape Town, Private Bag X 3, Rondebosch, 7701, South Africa; & Invertebrate palaeontology and Geology, Iziko South African Museum, P. O. Box 61, Cape Town 8000, South Africa. john. compton @ uct. ac. za; https: // orcid. org / 0000 - 0002 - 0765 - 4141
john.compton@uct.ac.za
Author
Compton, John S.
Marine Research Institute and Department of Geological Sciences, University of Cape Town, Private Bag X 3, Rondebosch, 7701, South Africa.
text
Zootaxa
2022
2022-01-12
5091
1
1
55
journal article
2636
10.11646/zootaxa.5091.1.1
51b42715-ddb1-4b4a-aad4-8be0f600a287
1175-5326
5840434
ABC8AF70-F691-4D07-8F20-70934642C8BC
Pseudonodosaria brevis
(
d’Orbigny, 1846
)
Pl. 1, fig. 19
Dentalina brevis
d’Orbigny, 1846
, p. 48
, pl. 2, figs. 9, 10.
Glandulina discreta
Reuss, 1850
, p. 366
, pl. 46, fig. 3;
Loeblich & Tappan, 1964
, C522, fig. 408: 5–6.
Description:
The test wall is calcareous, hyaline. The test is large, ovate, globular and circular in cross section. Chambers become larger as added. Sutures are depressed, with the aperture radiate, projecting slightly from the larger last chamber.
Remarks:
One test identified as
Pseudonodosaria brevis
was found between 74 and
79 cm
in core 2670. The test is of moderate size, measuring
0.4 mm
in cross-section and up to
0.9 mm
in length.
Life strategy
: This species is infaunal and adapted to suboxic conditions (
Pezelj
et al
., 2013
and references therein).
Regional occurrence:
This is the first documentation of this species in the area for the middle Miocene Namibian continental shelf. This species has, however, been recorded by
Hay
et al.
(1984)
in slope sediments off the Walvis Ridge in
late Miocene
to Pleistocene sediments.