New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific)
Author
Holzmann, Maria
0000-0003-2460-6210
Department of Genetics and Evolution, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Geneva, Switzerland.
olzmann@unige.ch
Author
Barrenechea-Angeles, Inés
Department of Genetics and Evolution, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Geneva, Switzerland. & Department of Geosciences, The Arctic University of Norway, Dramsvegen 201, 9037 TromsØ, Norway.
Author
Lim, Swee-Cheng
Tropical Marine Science Institute, National University of Singapore, 18 Kent Ridge Road, Singapore 119227, Singapore. & Lee Kong Chian Natural History Museum, National University of Singapore, 2 Conservatory Drive, Singapore 117377
Author
Pawlowski, Jan
Institute of Oceanology, Polish Academy of Sciences, 81 - 712 Sopot, Poland. & ID-Gene Ecodiagnostics, Chemin du Pont-du-Centenaire 109, 1228 Plan-les-Ouates, Switzerland.
text
Zootaxa
2024
2024-03-06
5419
2
151
188
http://dx.doi.org/10.11646/zootaxa.5419.2.1
journal article
10.11646/zootaxa.5419.2.1
1175-5326
10792055
88353CBA-6C4D-40E3-8475-B1FCA2C48637
Aschemonella
?
sp.
Supplementary
Fig. S2
Material examined.
BC040 RC1698 (morphology).
Description
. The two illustrated fragments are around 7 and
19 mm
in maximum dimension. The larger (Supplementary
Fig. S2B
) forms an irregular mass that is perforated by several open spaces, up to
2.20 mm
across, so that parts of it appear broadly reticulated. The smaller (Supplementary
Fig. S2A
) has a single round open space,
1.24 mm
in diameter, that is surrounded by broad bars, between 1.40 and 2.00 mm wide.
Both fragments are pale yellowish brown, with a smooth, generally finely agglutinated outer surface. However, the wall also incorporates relatively large, black grains, probably fragments of micronodules, that are concentrated in certain areas. This is most clear in the smaller fragment, where the dark grains occur mainly in bands across the bars, in one case being largely restricted to a distinct zone where the largest grain is 230 µm in size. The test wall is very delicate and no more than about 30-40 µm thick. There are no internal xenophyae and the test interior is filled with dark grey decayed stercomare.There is no sign of granellare.
Remarks.
The thin, delicate wall composed of mineral grains and the absence of internal xenophyae suggest a placement for these distinctive fragments in
Aschemonella
.